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authorLinus Torvalds <torvalds@linux-foundation.org>2013-02-26 09:35:29 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-26 09:35:29 -0800
commit4c8c225abf972ce422c241579ce1d4d27eaeb166 (patch)
tree77bc67defdc53c494b20632e66b82ce9be3c06af /drivers/gpio
parent3eb05225ee8efb81fe50558f5f9d94e7477ade8f (diff)
parent9170100ee46402af6d318134525c728027318d67 (diff)
downloadvexpress-lsk-4c8c225abf972ce422c241579ce1d4d27eaeb166.tar.gz
Merge tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux
Pull GPIO changes from Grant Likely: "This branch contains the usual set of individual driver improvements and bug fixes, as well as updates to the core code. The more notable changes include: - Internally add new API for referencing GPIOs by gpio_desc instead of number. Eventually this will become a public API - ACPI GPIO binding support" * tag 'gpio-for-linus' of git://git.secretlab.ca/git/linux: (33 commits) arm64: select ARCH_WANT_OPTIONAL_GPIOLIB gpio: em: Use irq_domain_add_simple() to fix runtime error gpio: using common order: let 'static const' instead of 'const static' gpio/vt8500: memory cleanup missing gpiolib: Fix locking on gpio debugfs files gpiolib: let gpio_chip reference its descriptors gpiolib: use descriptors internally gpiolib: use gpio_chips list in gpiochip_find_base gpiolib: use gpio_chips list in sysfs ops gpiolib: use gpio_chips list in gpiochip_find gpiolib: use gpio_chips list in gpiolib_sysfs_init gpiolib: link all gpio_chips using a list gpio/langwell: cleanup driver gpio/langwell: Add Cloverview ids to pci device table gpio/lynxpoint: add chipset gpio driver. gpiolib: add missing braces in gpio_direction_show gpiolib-acpi: Fix error checks in interrupt requesting gpio: mpc8xxx: don't set IRQ_TYPE_NONE when creating irq mapping gpiolib: remove gpiochip_reserve() arm: pxa: tosa: do not use gpiochip_reserve() ...
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/Kconfig11
-rw-r--r--drivers/gpio/Makefile4
-rw-r--r--drivers/gpio/gpio-em.c3
-rw-r--r--drivers/gpio/gpio-langwell.c53
-rw-r--r--drivers/gpio/gpio-lynxpoint.c469
-rw-r--r--drivers/gpio/gpio-mpc8xxx.c1
-rw-r--r--drivers/gpio/gpio-mxs.c31
-rw-r--r--drivers/gpio/gpio-omap.c6
-rw-r--r--drivers/gpio/gpio-pca953x.c380
-rw-r--r--drivers/gpio/gpio-pl061.c2
-rw-r--r--drivers/gpio/gpio-pxa.c7
-rw-r--r--drivers/gpio/gpio-twl4030.c176
-rw-r--r--drivers/gpio/gpio-vt8500.c65
-rw-r--r--drivers/gpio/gpiolib-acpi.c87
-rw-r--r--drivers/gpio/gpiolib.c759
15 files changed, 1454 insertions, 600 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 74e17f19cc3..93aaadf99f2 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -30,6 +30,9 @@ config ARCH_REQUIRE_GPIOLIB
Selecting this from the architecture code will cause the gpiolib
code to always get built in.
+config GPIO_DEVRES
+ def_bool y
+ depends on HAS_IOMEM
menuconfig GPIOLIB
@@ -298,6 +301,14 @@ config GPIO_GE_FPGA
and write pin state) for GPIO implemented in a number of GE single
board computers.
+config GPIO_LYNXPOINT
+ bool "Intel Lynxpoint GPIO support"
+ depends on ACPI
+ select IRQ_DOMAIN
+ help
+ driver for GPIO functionality on Intel Lynxpoint PCH chipset
+ Requires ACPI device enumeration code to set up a platform device.
+
comment "I2C GPIO expanders:"
config GPIO_ARIZONA
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 6dbcba2e5ca..22e07bc9fcb 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -2,7 +2,8 @@
ccflags-$(CONFIG_DEBUG_GPIO) += -DDEBUG
-obj-$(CONFIG_GPIOLIB) += gpiolib.o devres.o
+obj-$(CONFIG_GPIO_DEVRES) += devres.o
+obj-$(CONFIG_GPIOLIB) += gpiolib.o
obj-$(CONFIG_OF_GPIO) += gpiolib-of.o
obj-$(CONFIG_GPIO_ACPI) += gpiolib-acpi.o
@@ -30,6 +31,7 @@ obj-$(CONFIG_GPIO_JANZ_TTL) += gpio-janz-ttl.o
obj-$(CONFIG_ARCH_KS8695) += gpio-ks8695.o
obj-$(CONFIG_GPIO_LANGWELL) += gpio-langwell.o
obj-$(CONFIG_ARCH_LPC32XX) += gpio-lpc32xx.o
+obj-$(CONFIG_GPIO_LYNXPOINT) += gpio-lynxpoint.o
obj-$(CONFIG_GPIO_MAX730X) += gpio-max730x.o
obj-$(CONFIG_GPIO_MAX7300) += gpio-max7300.o
obj-$(CONFIG_GPIO_MAX7301) += gpio-max7301.o
diff --git a/drivers/gpio/gpio-em.c b/drivers/gpio/gpio-em.c
index bdc8302e711..deca78f9931 100644
--- a/drivers/gpio/gpio-em.c
+++ b/drivers/gpio/gpio-em.c
@@ -299,8 +299,9 @@ static int em_gio_probe(struct platform_device *pdev)
irq_chip->irq_set_type = em_gio_irq_set_type;
irq_chip->flags = IRQCHIP_SKIP_SET_WAKE;
- p->irq_domain = irq_domain_add_linear(pdev->dev.of_node,
+ p->irq_domain = irq_domain_add_simple(pdev->dev.of_node,
pdata->number_of_pins,
+ pdata->irq_base,
&em_gio_irq_domain_ops, p);
if (!p->irq_domain) {
ret = -ENXIO;
diff --git a/drivers/gpio/gpio-langwell.c b/drivers/gpio/gpio-langwell.c
index e77b2b3e94a..634c3d37f7b 100644
--- a/drivers/gpio/gpio-langwell.c
+++ b/drivers/gpio/gpio-langwell.c
@@ -71,10 +71,12 @@ struct lnw_gpio {
struct irq_domain *domain;
};
+#define to_lnw_priv(chip) container_of(chip, struct lnw_gpio, chip)
+
static void __iomem *gpio_reg(struct gpio_chip *chip, unsigned offset,
enum GPIO_REG reg_type)
{
- struct lnw_gpio *lnw = container_of(chip, struct lnw_gpio, chip);
+ struct lnw_gpio *lnw = to_lnw_priv(chip);
unsigned nreg = chip->ngpio / 32;
u8 reg = offset / 32;
void __iomem *ptr;
@@ -86,7 +88,7 @@ static void __iomem *gpio_reg(struct gpio_chip *chip, unsigned offset,
static void __iomem *gpio_reg_2bit(struct gpio_chip *chip, unsigned offset,
enum GPIO_REG reg_type)
{
- struct lnw_gpio *lnw = container_of(chip, struct lnw_gpio, chip);
+ struct lnw_gpio *lnw = to_lnw_priv(chip);
unsigned nreg = chip->ngpio / 32;
u8 reg = offset / 16;
void __iomem *ptr;
@@ -130,7 +132,7 @@ static void lnw_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
static int lnw_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
{
- struct lnw_gpio *lnw = container_of(chip, struct lnw_gpio, chip);
+ struct lnw_gpio *lnw = to_lnw_priv(chip);
void __iomem *gpdr = gpio_reg(chip, offset, GPDR);
u32 value;
unsigned long flags;
@@ -153,7 +155,7 @@ static int lnw_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
static int lnw_gpio_direction_output(struct gpio_chip *chip,
unsigned offset, int value)
{
- struct lnw_gpio *lnw = container_of(chip, struct lnw_gpio, chip);
+ struct lnw_gpio *lnw = to_lnw_priv(chip);
void __iomem *gpdr = gpio_reg(chip, offset, GPDR);
unsigned long flags;
@@ -176,7 +178,7 @@ static int lnw_gpio_direction_output(struct gpio_chip *chip,
static int lnw_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
{
- struct lnw_gpio *lnw = container_of(chip, struct lnw_gpio, chip);
+ struct lnw_gpio *lnw = to_lnw_priv(chip);
return irq_create_mapping(lnw->domain, offset);
}
@@ -234,6 +236,8 @@ static DEFINE_PCI_DEVICE_TABLE(lnw_gpio_ids) = { /* pin number */
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x080f), .driver_data = 64 },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x081f), .driver_data = 96 },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x081a), .driver_data = 96 },
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x08eb), .driver_data = 96 },
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x08f7), .driver_data = 96 },
{ 0, }
};
MODULE_DEVICE_TABLE(pci, lnw_gpio_ids);
@@ -299,17 +303,6 @@ static const struct irq_domain_ops lnw_gpio_irq_ops = {
.xlate = irq_domain_xlate_twocell,
};
-#ifdef CONFIG_PM
-static int lnw_gpio_runtime_resume(struct device *dev)
-{
- return 0;
-}
-
-static int lnw_gpio_runtime_suspend(struct device *dev)
-{
- return 0;
-}
-
static int lnw_gpio_runtime_idle(struct device *dev)
{
int err = pm_schedule_suspend(dev, 500);
@@ -320,16 +313,8 @@ static int lnw_gpio_runtime_idle(struct device *dev)
return -EBUSY;
}
-#else
-#define lnw_gpio_runtime_suspend NULL
-#define lnw_gpio_runtime_resume NULL
-#define lnw_gpio_runtime_idle NULL
-#endif
-
static const struct dev_pm_ops lnw_gpio_pm_ops = {
- .runtime_suspend = lnw_gpio_runtime_suspend,
- .runtime_resume = lnw_gpio_runtime_resume,
- .runtime_idle = lnw_gpio_runtime_idle,
+ SET_RUNTIME_PM_OPS(NULL, NULL, lnw_gpio_runtime_idle)
};
static int lnw_gpio_probe(struct pci_dev *pdev,
@@ -349,7 +334,7 @@ static int lnw_gpio_probe(struct pci_dev *pdev,
retval = pci_request_regions(pdev, "langwell_gpio");
if (retval) {
dev_err(&pdev->dev, "error requesting resources\n");
- goto err2;
+ goto err_pci_req_region;
}
/* get the gpio_base from bar1 */
start = pci_resource_start(pdev, 1);
@@ -358,7 +343,7 @@ static int lnw_gpio_probe(struct pci_dev *pdev,
if (!base) {
dev_err(&pdev->dev, "error mapping bar1\n");
retval = -EFAULT;
- goto err3;
+ goto err_ioremap;
}
gpio_base = *((u32 *)base + 1);
/* release the IO mapping, since we already get the info from bar1 */
@@ -370,21 +355,21 @@ static int lnw_gpio_probe(struct pci_dev *pdev,
if (!base) {
dev_err(&pdev->dev, "error mapping bar0\n");
retval = -EFAULT;
- goto err3;
+ goto err_ioremap;
}
- lnw = devm_kzalloc(&pdev->dev, sizeof(struct lnw_gpio), GFP_KERNEL);
+ lnw = devm_kzalloc(&pdev->dev, sizeof(*lnw), GFP_KERNEL);
if (!lnw) {
dev_err(&pdev->dev, "can't allocate langwell_gpio chip data\n");
retval = -ENOMEM;
- goto err3;
+ goto err_ioremap;
}
lnw->domain = irq_domain_add_linear(pdev->dev.of_node, ngpio,
&lnw_gpio_irq_ops, lnw);
if (!lnw->domain) {
retval = -ENOMEM;
- goto err3;
+ goto err_ioremap;
}
lnw->reg_base = base;
@@ -403,7 +388,7 @@ static int lnw_gpio_probe(struct pci_dev *pdev,
retval = gpiochip_add(&lnw->chip);
if (retval) {
dev_err(&pdev->dev, "langwell gpiochip_add error %d\n", retval);
- goto err3;
+ goto err_ioremap;
}
lnw_irq_init_hw(lnw);
@@ -418,9 +403,9 @@ static int lnw_gpio_probe(struct pci_dev *pdev,
return 0;
-err3:
+err_ioremap:
pci_release_regions(pdev);
-err2:
+err_pci_req_region:
pci_disable_device(pdev);
return retval;
}
diff --git a/drivers/gpio/gpio-lynxpoint.c b/drivers/gpio/gpio-lynxpoint.c
new file mode 100644
index 00000000000..3472b05ac51
--- /dev/null
+++ b/drivers/gpio/gpio-lynxpoint.c
@@ -0,0 +1,469 @@
+/*
+ * GPIO controller driver for Intel Lynxpoint PCH chipset>
+ * Copyright (c) 2012, Intel Corporation.
+ *
+ * Author: Mathias Nyman <mathias.nyman@linux.intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/bitops.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/gpio.h>
+#include <linux/irqdomain.h>
+#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+/* LynxPoint chipset has support for 94 gpio pins */
+
+#define LP_NUM_GPIO 94
+
+/* Bitmapped register offsets */
+#define LP_ACPI_OWNED 0x00 /* Bitmap, set by bios, 0: pin reserved for ACPI */
+#define LP_GC 0x7C /* set APIC IRQ to IRQ14 or IRQ15 for all pins */
+#define LP_INT_STAT 0x80
+#define LP_INT_ENABLE 0x90
+
+/* Each pin has two 32 bit config registers, starting at 0x100 */
+#define LP_CONFIG1 0x100
+#define LP_CONFIG2 0x104
+
+/* LP_CONFIG1 reg bits */
+#define OUT_LVL_BIT BIT(31)
+#define IN_LVL_BIT BIT(30)
+#define TRIG_SEL_BIT BIT(4) /* 0: Edge, 1: Level */
+#define INT_INV_BIT BIT(3) /* Invert interrupt triggering */
+#define DIR_BIT BIT(2) /* 0: Output, 1: Input */
+#define USE_SEL_BIT BIT(0) /* 0: Native, 1: GPIO */
+
+/* LP_CONFIG2 reg bits */
+#define GPINDIS_BIT BIT(2) /* disable input sensing */
+#define GPIWP_BIT (BIT(0) | BIT(1)) /* weak pull options */
+
+struct lp_gpio {
+ struct gpio_chip chip;
+ struct irq_domain *domain;
+ struct platform_device *pdev;
+ spinlock_t lock;
+ unsigned long reg_base;
+};
+
+/*
+ * Lynxpoint gpios are controlled through both bitmapped registers and
+ * per gpio specific registers. The bitmapped registers are in chunks of
+ * 3 x 32bit registers to cover all 94 gpios
+ *
+ * per gpio specific registers consist of two 32bit registers per gpio
+ * (LP_CONFIG1 and LP_CONFIG2), with 94 gpios there's a total of
+ * 188 config registes.
+ *
+ * A simplified view of the register layout look like this:
+ *
+ * LP_ACPI_OWNED[31:0] gpio ownerships for gpios 0-31 (bitmapped registers)
+ * LP_ACPI_OWNED[63:32] gpio ownerships for gpios 32-63
+ * LP_ACPI_OWNED[94:64] gpio ownerships for gpios 63-94
+ * ...
+ * LP_INT_ENABLE[31:0] ...
+ * LP_INT_ENABLE[63:31] ...
+ * LP_INT_ENABLE[94:64] ...
+ * LP0_CONFIG1 (gpio 0) config1 reg for gpio 0 (per gpio registers)
+ * LP0_CONFIG2 (gpio 0) config2 reg for gpio 0
+ * LP1_CONFIG1 (gpio 1) config1 reg for gpio 1
+ * LP1_CONFIG2 (gpio 1) config2 reg for gpio 1
+ * LP2_CONFIG1 (gpio 2) ...
+ * LP2_CONFIG2 (gpio 2) ...
+ * ...
+ * LP94_CONFIG1 (gpio 94) ...
+ * LP94_CONFIG2 (gpio 94) ...
+ */
+
+static unsigned long lp_gpio_reg(struct gpio_chip *chip, unsigned offset,
+ int reg)
+{
+ struct lp_gpio *lg = container_of(chip, struct lp_gpio, chip);
+ int reg_offset;
+
+ if (reg == LP_CONFIG1 || reg == LP_CONFIG2)
+ /* per gpio specific config registers */
+ reg_offset = offset * 8;
+ else
+ /* bitmapped registers */
+ reg_offset = (offset / 32) * 4;
+
+ return lg->reg_base + reg + reg_offset;
+}
+
+static int lp_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+ struct lp_gpio *lg = container_of(chip, struct lp_gpio, chip);
+ unsigned long reg = lp_gpio_reg(chip, offset, LP_CONFIG1);
+ unsigned long conf2 = lp_gpio_reg(chip, offset, LP_CONFIG2);
+ unsigned long acpi_use = lp_gpio_reg(chip, offset, LP_ACPI_OWNED);
+
+ pm_runtime_get(&lg->pdev->dev); /* should we put if failed */
+
+ /* Fail if BIOS reserved pin for ACPI use */
+ if (!(inl(acpi_use) & BIT(offset % 32))) {
+ dev_err(&lg->pdev->dev, "gpio %d reserved for ACPI\n", offset);
+ return -EBUSY;
+ }
+ /* Fail if pin is in alternate function mode (not GPIO mode) */
+ if (!(inl(reg) & USE_SEL_BIT))
+ return -ENODEV;
+
+ /* enable input sensing */
+ outl(inl(conf2) & ~GPINDIS_BIT, conf2);
+
+
+ return 0;
+}
+
+static void lp_gpio_free(struct gpio_chip *chip, unsigned offset)
+{
+ struct lp_gpio *lg = container_of(chip, struct lp_gpio, chip);
+ unsigned long conf2 = lp_gpio_reg(chip, offset, LP_CONFIG2);
+
+ /* disable input sensing */
+ outl(inl(conf2) | GPINDIS_BIT, conf2);
+
+ pm_runtime_put(&lg->pdev->dev);
+}
+
+static int lp_irq_type(struct irq_data *d, unsigned type)
+{
+ struct lp_gpio *lg = irq_data_get_irq_chip_data(d);
+ u32 hwirq = irqd_to_hwirq(d);
+ unsigned long flags;
+ u32 value;
+ unsigned long reg = lp_gpio_reg(&lg->chip, hwirq, LP_CONFIG1);
+
+ if (hwirq >= lg->chip.ngpio)
+ return -EINVAL;
+
+ spin_lock_irqsave(&lg->lock, flags);
+ value = inl(reg);
+
+ /* set both TRIG_SEL and INV bits to 0 for rising edge */
+ if (type & IRQ_TYPE_EDGE_RISING)
+ value &= ~(TRIG_SEL_BIT | INT_INV_BIT);
+
+ /* TRIG_SEL bit 0, INV bit 1 for falling edge */
+ if (type & IRQ_TYPE_EDGE_FALLING)
+ value = (value | INT_INV_BIT) & ~TRIG_SEL_BIT;
+
+ /* TRIG_SEL bit 1, INV bit 0 for level low */
+ if (type & IRQ_TYPE_LEVEL_LOW)
+ value = (value | TRIG_SEL_BIT) & ~INT_INV_BIT;
+
+ /* TRIG_SEL bit 1, INV bit 1 for level high */
+ if (type & IRQ_TYPE_LEVEL_HIGH)
+ value |= TRIG_SEL_BIT | INT_INV_BIT;
+
+ outl(value, reg);
+ spin_unlock_irqrestore(&lg->lock, flags);
+
+ return 0;
+}
+
+static int lp_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+ unsigned long reg = lp_gpio_reg(chip, offset, LP_CONFIG1);
+ return inl(reg) & IN_LVL_BIT;
+}
+
+static void lp_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+ struct lp_gpio *lg = container_of(chip, struct lp_gpio, chip);
+ unsigned long reg = lp_gpio_reg(chip, offset, LP_CONFIG1);
+ unsigned long flags;
+
+ spin_lock_irqsave(&lg->lock, flags);
+
+ if (value)
+ outl(inl(reg) | OUT_LVL_BIT, reg);
+ else
+ outl(inl(reg) & ~OUT_LVL_BIT, reg);
+
+ spin_unlock_irqrestore(&lg->lock, flags);
+}
+
+static int lp_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+ struct lp_gpio *lg = container_of(chip, struct lp_gpio, chip);
+ unsigned long reg = lp_gpio_reg(chip, offset, LP_CONFIG1);
+ unsigned long flags;
+
+ spin_lock_irqsave(&lg->lock, flags);
+ outl(inl(reg) | DIR_BIT, reg);
+ spin_unlock_irqrestore(&lg->lock, flags);
+
+ return 0;
+}
+
+static int lp_gpio_direction_output(struct gpio_chip *chip,
+ unsigned offset, int value)
+{
+ struct lp_gpio *lg = container_of(chip, struct lp_gpio, chip);
+ unsigned long reg = lp_gpio_reg(chip, offset, LP_CONFIG1);
+ unsigned long flags;
+
+ lp_gpio_set(chip, offset, value);
+
+ spin_lock_irqsave(&lg->lock, flags);
+ outl(inl(reg) & ~DIR_BIT, reg);
+ spin_unlock_irqrestore(&lg->lock, flags);
+
+ return 0;
+}
+
+static int lp_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+ struct lp_gpio *lg = container_of(chip, struct lp_gpio, chip);
+ return irq_create_mapping(lg->domain, offset);
+}
+
+static void lp_gpio_irq_handler(unsigned irq, struct irq_desc *desc)
+{
+ struct irq_data *data = irq_desc_get_irq_data(desc);
+ struct lp_gpio *lg = irq_data_get_irq_handler_data(data);
+ struct irq_chip *chip = irq_data_get_irq_chip(data);
+ u32 base, pin, mask;
+ unsigned long reg, pending;
+ unsigned virq;
+
+ /* check from GPIO controller which pin triggered the interrupt */
+ for (base = 0; base < lg->chip.ngpio; base += 32) {
+ reg = lp_gpio_reg(&lg->chip, base, LP_INT_STAT);
+
+ while ((pending = inl(reg))) {
+ pin = __ffs(pending);
+ mask = BIT(pin);
+ /* Clear before handling so we don't lose an edge */
+ outl(mask, reg);
+ virq = irq_find_mapping(lg->domain, base + pin);
+ generic_handle_irq(virq);
+ }
+ }
+ chip->irq_eoi(data);
+}
+
+static void lp_irq_unmask(struct irq_data *d)
+{
+}
+
+static void lp_irq_mask(struct irq_data *d)
+{
+}
+
+static void lp_irq_enable(struct irq_data *d)
+{
+ struct lp_gpio *lg = irq_data_get_irq_chip_data(d);
+ u32 hwirq = irqd_to_hwirq(d);
+ unsigned long reg = lp_gpio_reg(&lg->chip, hwirq, LP_INT_ENABLE);
+ unsigned long flags;
+
+ spin_lock_irqsave(&lg->lock, flags);
+ outl(inl(reg) | BIT(hwirq % 32), reg);
+ spin_unlock_irqrestore(&lg->lock, flags);
+}
+
+static void lp_irq_disable(struct irq_data *d)
+{
+ struct lp_gpio *lg = irq_data_get_irq_chip_data(d);
+ u32 hwirq = irqd_to_hwirq(d);
+ unsigned long reg = lp_gpio_reg(&lg->chip, hwirq, LP_INT_ENABLE);
+ unsigned long flags;
+
+ spin_lock_irqsave(&lg->lock, flags);
+ outl(inl(reg) & ~BIT(hwirq % 32), reg);
+ spin_unlock_irqrestore(&lg->lock, flags);
+}
+
+static struct irq_chip lp_irqchip = {
+ .name = "LP-GPIO",
+ .irq_mask = lp_irq_mask,
+ .irq_unmask = lp_irq_unmask,
+ .irq_enable = lp_irq_enable,
+ .irq_disable = lp_irq_disable,
+ .irq_set_type = lp_irq_type,
+ .flags = IRQCHIP_SKIP_SET_WAKE,
+};
+
+static void lp_gpio_irq_init_hw(struct lp_gpio *lg)
+{
+ unsigned long reg;
+ unsigned base;
+
+ for (base = 0; base < lg->chip.ngpio; base += 32) {
+ /* disable gpio pin interrupts */
+ reg = lp_gpio_reg(&lg->chip, base, LP_INT_ENABLE);
+ outl(0, reg);
+ /* Clear interrupt status register */
+ reg = lp_gpio_reg(&lg->chip, base, LP_INT_STAT);
+ outl(0xffffffff, reg);
+ }
+}
+
+static int lp_gpio_irq_map(struct irq_domain *d, unsigned int virq,
+ irq_hw_number_t hw)
+{
+ struct lp_gpio *lg = d->host_data;
+
+ irq_set_chip_and_handler_name(virq, &lp_irqchip, handle_simple_irq,
+ "demux");
+ irq_set_chip_data(virq, lg);
+ irq_set_irq_type(virq, IRQ_TYPE_NONE);
+
+ return 0;
+}
+
+static const struct irq_domain_ops lp_gpio_irq_ops = {
+ .map = lp_gpio_irq_map,
+};
+
+static int lp_gpio_probe(struct platform_device *pdev)
+{
+ struct lp_gpio *lg;
+ struct gpio_chip *gc;
+ struct resource *io_rc, *irq_rc;
+ struct device *dev = &pdev->dev;
+ unsigned long reg_len;
+ unsigned hwirq;
+ int ret = -ENODEV;
+
+ lg = devm_kzalloc(dev, sizeof(struct lp_gpio), GFP_KERNEL);
+ if (!lg) {
+ dev_err(dev, "can't allocate lp_gpio chip data\n");
+ return -ENOMEM;
+ }
+
+ lg->pdev = pdev;
+ platform_set_drvdata(pdev, lg);
+
+ io_rc = platform_get_resource(pdev, IORESOURCE_IO, 0);
+ irq_rc = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+
+ if (!io_rc) {
+ dev_err(dev, "missing IO resources\n");
+ return -EINVAL;
+ }
+
+ lg->reg_base = io_rc->start;
+ reg_len = resource_size(io_rc);
+
+ if (!devm_request_region(dev, lg->reg_base, reg_len, "lp-gpio")) {
+ dev_err(dev, "failed requesting IO region 0x%x\n",
+ (unsigned int)lg->reg_base);
+ return -EBUSY;
+ }
+
+ spin_lock_init(&lg->lock);
+
+ gc = &lg->chip;
+ gc->label = dev_name(dev);
+ gc->owner = THIS_MODULE;
+ gc->request = lp_gpio_request;
+ gc->free = lp_gpio_free;
+ gc->direction_input = lp_gpio_direction_input;
+ gc->direction_output = lp_gpio_direction_output;
+ gc->get = lp_gpio_get;
+ gc->set = lp_gpio_set;
+ gc->base = -1;
+ gc->ngpio = LP_NUM_GPIO;
+ gc->can_sleep = 0;
+ gc->dev = dev;
+
+ /* set up interrupts */
+ if (irq_rc && irq_rc->start) {
+ hwirq = irq_rc->start;
+ gc->to_irq = lp_gpio_to_irq;
+
+ lg->domain = irq_domain_add_linear(NULL, LP_NUM_GPIO,
+ &lp_gpio_irq_ops, lg);
+ if (!lg->domain)
+ return -ENXIO;
+
+ lp_gpio_irq_init_hw(lg);
+
+ irq_set_handler_data(hwirq, lg);
+ irq_set_chained_handler(hwirq, lp_gpio_irq_handler);
+ }
+
+ ret = gpiochip_add(gc);
+ if (ret) {
+ dev_err(dev, "failed adding lp-gpio chip\n");
+ return ret;
+ }
+ pm_runtime_enable(dev);
+
+ return 0;
+}
+
+static int lp_gpio_runtime_suspend(struct device *dev)
+{
+ return 0;
+}
+
+static int lp_gpio_runtime_resume(struct device *dev)
+{
+ return 0;
+}
+
+static const struct dev_pm_ops lp_gpio_pm_ops = {
+ .runtime_suspend = lp_gpio_runtime_suspend,
+ .runtime_resume = lp_gpio_runtime_resume,
+};
+
+static const struct acpi_device_id lynxpoint_gpio_acpi_match[] = {
+ { "INT33C7", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, lynxpoint_gpio_acpi_match);
+
+static int lp_gpio_remove(struct platform_device *pdev)
+{
+ struct lp_gpio *lg = platform_get_drvdata(pdev);
+ int err;
+ err = gpiochip_remove(&lg->chip);
+ if (err)
+ dev_warn(&pdev->dev, "failed to remove gpio_chip.\n");
+ platform_set_drvdata(pdev, NULL);
+ return 0;
+}
+
+static struct platform_driver lp_gpio_driver = {
+ .probe = lp_gpio_probe,
+ .remove = lp_gpio_remove,
+ .driver = {
+ .name = "lp_gpio",
+ .owner = THIS_MODULE,
+ .pm = &lp_gpio_pm_ops,
+ .acpi_match_table = ACPI_PTR(lynxpoint_gpio_acpi_match),
+ },
+};
+
+static int __init lp_gpio_init(void)
+{
+ return platform_driver_register(&lp_gpio_driver);
+}
+
+subsys_initcall(lp_gpio_init);
diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c
index 9ae29cc0d17..a0b33a216d4 100644
--- a/drivers/gpio/gpio-mpc8xxx.c
+++ b/drivers/gpio/gpio-mpc8xxx.c
@@ -292,7 +292,6 @@ static int mpc8xxx_gpio_irq_map(struct irq_domain *h, unsigned int virq,
irq_set_chip_data(virq, h->host_data);
irq_set_chip_and_handler(virq, &mpc8xxx_irq_chip, handle_level_irq);
- irq_set_irq_type(virq, IRQ_TYPE_NONE);
return 0;
}
diff --git a/drivers/gpio/gpio-mxs.c b/drivers/gpio/gpio-mxs.c
index 45d97c46831..25000b0f845 100644
--- a/drivers/gpio/gpio-mxs.c
+++ b/drivers/gpio/gpio-mxs.c
@@ -66,6 +66,7 @@ struct mxs_gpio_port {
struct irq_domain *domain;
struct bgpio_chip bgc;
enum mxs_gpio_id devid;
+ u32 both_edges;
};
static inline int is_imx23_gpio(struct mxs_gpio_port *port)
@@ -82,13 +83,23 @@ static inline int is_imx28_gpio(struct mxs_gpio_port *port)
static int mxs_gpio_set_irq_type(struct irq_data *d, unsigned int type)
{
+ u32 val;
u32 pin_mask = 1 << d->hwirq;
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
struct mxs_gpio_port *port = gc->private;
void __iomem *pin_addr;
int edge;
+ port->both_edges &= ~pin_mask;
switch (type) {
+ case IRQ_TYPE_EDGE_BOTH:
+ val = gpio_get_value(port->bgc.gc.base + d->hwirq);
+ if (val)
+ edge = GPIO_INT_FALL_EDGE;
+ else
+ edge = GPIO_INT_RISE_EDGE;
+ port->both_edges |= pin_mask;
+ break;
case IRQ_TYPE_EDGE_RISING:
edge = GPIO_INT_RISE_EDGE;
break;
@@ -125,6 +136,23 @@ static int mxs_gpio_set_irq_type(struct irq_data *d, unsigned int type)
return 0;
}
+static void mxs_flip_edge(struct mxs_gpio_port *port, u32 gpio)
+{
+ u32 bit, val, edge;
+ void __iomem *pin_addr;
+
+ bit = 1 << gpio;
+
+ pin_addr = port->base + PINCTRL_IRQPOL(port);
+ val = readl(pin_addr);
+ edge = val & bit;
+
+ if (edge)
+ writel(bit, pin_addr + MXS_CLR);
+ else
+ writel(bit, pin_addr + MXS_SET);
+}
+
/* MXS has one interrupt *per* gpio port */
static void mxs_gpio_irq_handler(u32 irq, struct irq_desc *desc)
{
@@ -138,6 +166,9 @@ static void mxs_gpio_irq_handler(u32 irq, struct irq_desc *desc)
while (irq_stat != 0) {
int irqoffset = fls(irq_stat) - 1;
+ if (port->both_edges & (1 << irqoffset))
+ mxs_flip_edge(port, irqoffset);
+
generic_handle_irq(irq_find_mapping(port->domain, irqoffset));
irq_stat &= ~(1 << irqoffset);
}
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index f1fbedb2a6f..159f5c57eb4 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -1476,19 +1476,19 @@ static struct omap_gpio_reg_offs omap4_gpio_regs = {
.fallingdetect = OMAP4_GPIO_FALLINGDETECT,
};
-const static struct omap_gpio_platform_data omap2_pdata = {
+static const struct omap_gpio_platform_data omap2_pdata = {
.regs = &omap2_gpio_regs,
.bank_width = 32,
.dbck_flag = false,
};
-const static struct omap_gpio_platform_data omap3_pdata = {
+static const struct omap_gpio_platform_data omap3_pdata = {
.regs = &omap2_gpio_regs,
.bank_width = 32,
.dbck_flag = true,
};
-const static struct omap_gpio_platform_data omap4_pdata = {
+static const struct omap_gpio_platform_data omap4_pdata = {
.regs = &omap4_gpio_regs,
.bank_width = 32,
.dbck_flag = true,
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index cc102d25ee2..24059462c87 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -46,6 +46,7 @@
#define PCA957X_TYPE 0x2000
static const struct i2c_device_id pca953x_id[] = {
+ { "pca9505", 40 | PCA953X_TYPE | PCA_INT, },
{ "pca9534", 8 | PCA953X_TYPE | PCA_INT, },
{ "pca9535", 16 | PCA953X_TYPE | PCA_INT, },
{ "pca9536", 4 | PCA953X_TYPE, },
@@ -71,19 +72,23 @@ static const struct i2c_device_id pca953x_id[] = {
};
MODULE_DEVICE_TABLE(i2c, pca953x_id);
+#define MAX_BANK 5
+#define BANK_SZ 8
+
+#define NBANK(chip) (chip->gpio_chip.ngpio / BANK_SZ)
+
struct pca953x_chip {
unsigned gpio_start;
- u32 reg_output;
- u32 reg_direction;
+ u8 reg_output[MAX_BANK];
+ u8 reg_direction[MAX_BANK];
struct mutex i2c_lock;
#ifdef CONFIG_GPIO_PCA953X_IRQ
struct mutex irq_lock;
- u32 irq_mask;
- u32 irq_stat;
- u32 irq_trig_raise;
- u32 irq_trig_fall;
- int irq_base;
+ u8 irq_mask[MAX_BANK];
+ u8 irq_stat[MAX_BANK];
+ u8 irq_trig_raise[MAX_BANK];
+ u8 irq_trig_fall[MAX_BANK];
struct irq_domain *domain;
#endif
@@ -93,33 +98,69 @@ struct pca953x_chip {
int chip_type;
};
-static int pca953x_write_reg(struct pca953x_chip *chip, int reg, u32 val)
+static int pca953x_read_single(struct pca953x_chip *chip, int reg, u32 *val,
+ int off)
+{
+ int ret;
+ int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
+ int offset = off / BANK_SZ;
+
+ ret = i2c_smbus_read_byte_data(chip->client,
+ (reg << bank_shift) + offset);
+ *val = ret;
+
+ if (ret < 0) {
+ dev_err(&chip->client->dev, "failed reading register\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int pca953x_write_single(struct pca953x_chip *chip, int reg, u32 val,
+ int off)
+{
+ int ret = 0;
+ int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
+ int offset = off / BANK_SZ;
+
+ ret = i2c_smbus_write_byte_data(chip->client,
+ (reg << bank_shift) + offset, val);
+
+ if (ret < 0) {
+ dev_err(&chip->client->dev, "failed writing register\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int pca953x_write_regs(struct pca953x_chip *chip, int reg, u8 *val)
{
int ret = 0;
if (chip->gpio_chip.ngpio <= 8)
- ret = i2c_smbus_write_byte_data(chip->client, reg, val);
- else if (chip->gpio_chip.ngpio == 24) {
- cpu_to_le32s(&val);
+ ret = i2c_smbus_write_byte_data(chip->client, reg, *val);
+ else if (chip->gpio_chip.ngpio >= 24) {
+ int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
ret = i2c_smbus_write_i2c_block_data(chip->client,
- (reg << 2) | REG_ADDR_AI,
- 3,
- (u8 *) &val);
+ (reg << bank_shift) | REG_ADDR_AI,
+ NBANK(chip), val);
}
else {
switch (chip->chip_type) {
case PCA953X_TYPE:
ret = i2c_smbus_write_word_data(chip->client,
- reg << 1, val);
+ reg << 1, (u16) *val);
break;
case PCA957X_TYPE:
ret = i2c_smbus_write_byte_data(chip->client, reg << 1,
- val & 0xff);
+ val[0]);
if (ret < 0)
break;
ret = i2c_smbus_write_byte_data(chip->client,
(reg << 1) + 1,
- (val & 0xff00) >> 8);
+ val[1]);
break;
}
}
@@ -132,26 +173,24 @@ static int pca953x_write_reg(struct pca953x_chip *chip, int reg, u32 val)
return 0;
}
-static int pca953x_read_reg(struct pca953x_chip *chip, int reg, u32 *val)
+static int pca953x_read_regs(struct pca953x_chip *chip, int reg, u8 *val)
{
int ret;
if (chip->gpio_chip.ngpio <= 8) {
ret = i2c_smbus_read_byte_data(chip->client, reg);
*val = ret;
- }
- else if (chip->gpio_chip.ngpio == 24) {
- *val = 0;
+ } else if (chip->gpio_chip.ngpio >= 24) {
+ int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
+
ret = i2c_smbus_read_i2c_block_data(chip->client,
- (reg << 2) | REG_ADDR_AI,
- 3,
- (u8 *) val);
- le32_to_cpus(val);
+ (reg << bank_shift) | REG_ADDR_AI,
+ NBANK(chip), val);
} else {
ret = i2c_smbus_read_word_data(chip->client, reg << 1);
- *val = ret;
+ val[0] = (u16)ret & 0xFF;
+ val[1] = (u16)ret >> 8;
}
-
if (ret < 0) {
dev_err(&chip->client->dev, "failed reading register\n");
return ret;
@@ -163,13 +202,13 @@ static int pca953x_read_reg(struct pca953x_chip *chip, int reg, u32 *val)
static int pca953x_gpio_direction_input(struct gpio_chip *gc, unsigned off)
{
struct pca953x_chip *chip;
- uint reg_val;
+ u8 reg_val;
int ret, offset = 0;
chip = container_of(gc, struct pca953x_chip, gpio_chip);
mutex_lock(&chip->i2c_lock);
- reg_val = chip->reg_direction | (1u << off);
+ reg_val = chip->reg_direction[off / BANK_SZ] | (1u << (off % BANK_SZ));
switch (chip->chip_type) {
case PCA953X_TYPE:
@@ -179,11 +218,11 @@ static int pca953x_gpio_direction_input(struct gpio_chip *gc, unsigned off)
offset = PCA957X_CFG;
break;
}
- ret = pca953x_write_reg(chip, offset, reg_val);
+ ret = pca953x_write_single(chip, offset, reg_val, off);
if (ret)
goto exit;
- chip->reg_direction = reg_val;
+ chip->reg_direction[off / BANK_SZ] = reg_val;
ret = 0;
exit:
mutex_unlock(&chip->i2c_lock);
@@ -194,7 +233,7 @@ static int pca953x_gpio_direction_output(struct gpio_chip *gc,
unsigned off, int val)
{
struct pca953x_chip *chip;
- uint reg_val;
+ u8 reg_val;
int ret, offset = 0;
chip = container_of(gc, struct pca953x_chip, gpio_chip);
@@ -202,9 +241,11 @@ static int pca953x_gpio_direction_output(struct gpio_chip *gc,
mutex_lock(&chip->i2c_lock);
/* set output level */
if (val)
- reg_val = chip->reg_output | (1u << off);
+ reg_val = chip->reg_output[off / BANK_SZ]
+ | (1u << (off % BANK_SZ));
else
- reg_val = chip->reg_output & ~(1u << off);
+ reg_val = chip->reg_output[off / BANK_SZ]
+ & ~(1u << (off % BANK_SZ));
switch (chip->chip_type) {
case PCA953X_TYPE:
@@ -214,14 +255,14 @@ static int pca953x_gpio_direction_output(struct gpio_chip *gc,
offset = PCA957X_OUT;
break;
}
- ret = pca953x_write_reg(chip, offset, reg_val);
+ ret = pca953x_write_single(chip, offset, reg_val, off);
if (ret)
goto exit;
- chip->reg_output = reg_val;
+ chip->reg_output[off / BANK_SZ] = reg_val;
/* then direction */
- reg_val = chip->reg_direction & ~(1u << off);
+ reg_val = chip->reg_direction[off / BANK_SZ] & ~(1u << (off % BANK_SZ));
switch (chip->chip_type) {
case PCA953X_TYPE:
offset = PCA953X_DIRECTION;
@@ -230,11 +271,11 @@ static int pca953x_gpio_direction_output(struct gpio_chip *gc,
offset = PCA957X_CFG;
break;
}
- ret = pca953x_write_reg(chip, offset, reg_val);
+ ret = pca953x_write_single(chip, offset, reg_val, off);
if (ret)
goto exit;
- chip->reg_direction = reg_val;
+ chip->reg_direction[off / BANK_SZ] = reg_val;
ret = 0;
exit:
mutex_unlock(&chip->i2c_lock);
@@ -258,7 +299,7 @@ static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off)
offset = PCA957X_IN;
break;
}
- ret = pca953x_read_reg(chip, offset, &reg_val);
+ ret = pca953x_read_single(chip, offset, &reg_val, off);
mutex_unlock(&chip->i2c_lock);
if (ret < 0) {
/* NOTE: diagnostic already emitted; that's all we should
@@ -274,16 +315,18 @@ static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off)
static void pca953x_gpio_set_value(struct gpio_chip *gc, unsigned off, int val)
{
struct pca953x_chip *chip;
- u32 reg_val;
+ u8 reg_val;
int ret, offset = 0;
chip = container_of(gc, struct pca953x_chip, gpio_chip);
mutex_lock(&chip->i2c_lock);
if (val)
- reg_val = chip->reg_output | (1u << off);
+ reg_val = chip->reg_output[off / BANK_SZ]
+ | (1u << (off % BANK_SZ));
else
- reg_val = chip->reg_output & ~(1u << off);
+ reg_val = chip->reg_output[off / BANK_SZ]
+ & ~(1u << (off % BANK_SZ));
switch (chip->chip_type) {
case PCA953X_TYPE:
@@ -293,11 +336,11 @@ static void pca953x_gpio_set_value(struct gpio_chip *gc, unsigned off, int val)
offset = PCA957X_OUT;
break;
}
- ret = pca953x_write_reg(chip, offset, reg_val);
+ ret = pca953x_write_single(chip, offset, reg_val, off);
if (ret)
goto exit;
- chip->reg_output = reg_val;
+ chip->reg_output[off / BANK_SZ] = reg_val;
exit:
mutex_unlock(&chip->i2c_lock);
}
@@ -328,21 +371,21 @@ static int pca953x_gpio_to_irq(struct gpio_chip *gc, unsigned off)
struct pca953x_chip *chip;
chip = container_of(gc, struct pca953x_chip, gpio_chip);
- return chip->irq_base + off;
+ return irq_create_mapping(chip->domain, off);
}
static void pca953x_irq_mask(struct irq_data *d)
{
struct pca953x_chip *chip = irq_data_get_irq_chip_data(d);
- chip->irq_mask &= ~(1 << d->hwirq);
+ chip->irq_mask[d->hwirq / BANK_SZ] &= ~(1 << (d->hwirq % BANK_SZ));
}
static void pca953x_irq_unmask(struct irq_data *d)
{
struct pca953x_chip *chip = irq_data_get_irq_chip_data(d);
- chip->irq_mask |= 1 << d->hwirq;
+ chip->irq_mask[d->hwirq / BANK_SZ] |= 1 << (d->hwirq % BANK_SZ);
}
static void pca953x_irq_bus_lock(struct irq_data *d)
@@ -355,17 +398,20 @@ static void pca953x_irq_bus_lock(struct irq_data *d)
static void pca953x_irq_bus_sync_unlock(struct irq_data *d)
{
struct pca953x_chip *chip = irq_data_get_irq_chip_data(d);
- u32 new_irqs;
- u32 level;
+ u8 new_irqs;
+ int level, i;
/* Look for any newly setup interrupt */
- new_irqs = chip->irq_trig_fall | chip->irq_trig_raise;
- new_irqs &= ~chip->reg_direction;
-
- while (new_irqs) {
- level = __ffs(new_irqs);
- pca953x_gpio_direction_input(&chip->gpio_chip, level);
- new_irqs &= ~(1 << level);
+ for (i = 0; i < NBANK(chip); i++) {
+ new_irqs = chip->irq_trig_fall[i] | chip->irq_trig_raise[i];
+ new_irqs &= ~chip->reg_direction[i];
+
+ while (new_irqs) {
+ level = __ffs(new_irqs);
+ pca953x_gpio_direction_input(&chip->gpio_chip,
+ level + (BANK_SZ * i));
+ new_irqs &= ~(1 << level);
+ }
}
mutex_unlock(&chip->irq_lock);
@@ -374,7 +420,8 @@ static void pca953x_irq_bus_sync_unlock(struct irq_data *d)
static int pca953x_irq_set_type(struct irq_data *d, unsigned int type)
{
struct pca953x_chip *chip = irq_data_get_irq_chip_data(d);
- u32 mask = 1 << d->hwirq;
+ int bank_nb = d->hwirq / BANK_SZ;
+ u8 mask = 1 << (d->hwirq % BANK_SZ);
if (!(type & IRQ_TYPE_EDGE_BOTH)) {
dev_err(&chip->client->dev, "irq %d: unsupported type %d\n",
@@ -383,14 +430,14 @@ static int pca953x_irq_set_type(struct irq_data *d, unsigned int type)
}
if (type & IRQ_TYPE_EDGE_FALLING)
- chip->irq_trig_fall |= mask;
+ chip->irq_trig_fall[bank_nb] |= mask;
else
- chip->irq_trig_fall &= ~mask;
+ chip->irq_trig_fall[bank_nb] &= ~mask;
if (type & IRQ_TYPE_EDGE_RISING)
- chip->irq_trig_raise |= mask;
+ chip->irq_trig_raise[bank_nb] |= mask;
else
- chip->irq_trig_raise &= ~mask;
+ chip->irq_trig_raise[bank_nb] &= ~mask;
return 0;
}
@@ -404,13 +451,13 @@ static struct irq_chip pca953x_irq_chip = {
.irq_set_type = pca953x_irq_set_type,
};
-static u32 pca953x_irq_pending(struct pca953x_chip *chip)
+static u8 pca953x_irq_pending(struct pca953x_chip *chip, u8 *pending)
{
- u32 cur_stat;
- u32 old_stat;
- u32 pending;
- u32 trigger;
- int ret, offset = 0;
+ u8 cur_stat[MAX_BANK];
+ u8 old_stat[MAX_BANK];
+ u8 pendings = 0;
+ u8 trigger[MAX_BANK], triggers = 0;
+ int ret, i, offset = 0;
switch (chip->chip_type) {
case PCA953X_TYPE:
@@ -420,60 +467,88 @@ static u32 pca953x_irq_pending(struct pca953x_chip *chip)
offset = PCA957X_IN;
break;
}
- ret = pca953x_read_reg(chip, offset, &cur_stat);
+ ret = pca953x_read_regs(chip, offset, cur_stat);
if (ret)
return 0;
/* Remove output pins from the equation */
- cur_stat &= chip->reg_direction;
+ for (i = 0; i < NBANK(chip); i++)
+ cur_stat[i] &= chip->reg_direction[i];
+
+ memcpy(old_stat, chip->irq_stat, NBANK(chip));
- old_stat = chip->irq_stat;
- trigger = (cur_stat ^ old_stat) & chip->irq_mask;
+ for (i = 0; i < NBANK(chip); i++) {
+ trigger[i] = (cur_stat[i] ^ old_stat[i]) & chip->irq_mask[i];
+ triggers += trigger[i];
+ }
- if (!trigger)
+ if (!triggers)
return 0;
- chip->irq_stat = cur_stat;
+ memcpy(chip->irq_stat, cur_stat, NBANK(chip));
- pending = (old_stat & chip->irq_trig_fall) |
- (cur_stat & chip->irq_trig_raise);
- pending &= trigger;
+ for (i = 0; i < NBANK(chip); i++) {
+ pending[i] = (old_stat[i] & chip->irq_trig_fall[i]) |
+ (cur_stat[i] & chip->irq_trig_raise[i]);
+ pending[i] &= trigger[i];
+ pendings += pending[i];
+ }
- return pending;
+ return pendings;
}
static irqreturn_t pca953x_irq_handler(int irq, void *devid)
{
struct pca953x_chip *chip = devid;
- u32 pending;
- u32 level;
-
- pending = pca953x_irq_pending(chip);
+ u8 pending[MAX_BANK];
+ u8 level;
+ int i;
- if (!pending)
+ if (!pca953x_irq_pending(chip, pending))
return IRQ_HANDLED;
- do {
- level = __ffs(pending);
- handle_nested_irq(irq_find_mapping(chip->domain, level));
-
- pending &= ~(1 << level);
- } while (pending);
+ for (i = 0; i < NBANK(chip); i++) {
+ while (pending[i]) {
+ level = __ffs(pending[i]);
+ handle_nested_irq(irq_find_mapping(chip->domain,
+ level + (BANK_SZ * i)));
+ pending[i] &= ~(1 << level);
+ }
+ }
return IRQ_HANDLED;
}
+static int pca953x_gpio_irq_map(struct irq_domain *d, unsigned int irq,
+ irq_hw_number_t hwirq)
+{
+ irq_clear_status_flags(irq, IRQ_NOREQUEST);
+ irq_set_chip_data(irq, d->host_data);
+ irq_set_chip(irq, &pca953x_irq_chip);
+ irq_set_nested_thread(irq, true);
+#ifdef CONFIG_ARM
+ set_irq_flags(irq, IRQF_VALID);
+#else
+ irq_set_noprobe(irq);
+#endif
+
+ return 0;
+}
+
+static const struct irq_domain_ops pca953x_irq_simple_ops = {
+ .map = pca953x_gpio_irq_map,
+ .xlate = irq_domain_xlate_twocell,
+};
+
static int pca953x_irq_setup(struct pca953x_chip *chip,
const struct i2c_device_id *id,
int irq_base)
{
struct i2c_client *client = chip->client;
- int ret, offset = 0;
- u32 temporary;
+ int ret, i, offset = 0;
if (irq_base != -1
&& (id->driver_data & PCA_INT)) {
- int lvl;
switch (chip->chip_type) {
case PCA953X_TYPE:
@@ -483,49 +558,29 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
offset = PCA957X_IN;
break;
}
- ret = pca953x_read_reg(chip, offset, &temporary);
- chip->irq_stat = temporary;
+ ret = pca953x_read_regs(chip, offset, chip->irq_stat);
if (ret)
- goto out_failed;
+ return ret;
/*
* There is no way to know which GPIO line generated the
* interrupt. We have to rely on the previous read for
* this purpose.
*/
- chip->irq_stat &= chip->reg_direction;
+ for (i = 0; i < NBANK(chip); i++)
+ chip->irq_stat[i] &= chip->reg_direction[i];
mutex_init(&chip->irq_lock);
- chip->irq_base = irq_alloc_descs(-1, irq_base, chip->gpio_chip.ngpio, -1);
- if (chip->irq_base < 0)
- goto out_failed;
-
- chip->domain = irq_domain_add_legacy(client->dev.of_node,
+ chip->domain = irq_domain_add_simple(client->dev.of_node,
chip->gpio_chip.ngpio,
- chip->irq_base,
- 0,
- &irq_domain_simple_ops,
+ irq_base,
+ &pca953x_irq_simple_ops,
NULL);
- if (!chip->domain) {
- ret = -ENODEV;
- goto out_irqdesc_free;
- }
+ if (!chip->domain)
+ return -ENODEV;
- for (lvl = 0; lvl < chip->gpio_chip.ngpio; lvl++) {
- int irq = lvl + chip->irq_base;
-
- irq_clear_status_flags(irq, IRQ_NOREQUEST);
- irq_set_chip_data(irq, chip);
- irq_set_chip(irq, &pca953x_irq_chip);
- irq_set_nested_thread(irq, true);
-#ifdef CONFIG_ARM
- set_irq_flags(irq, IRQF_VALID);
-#else
- irq_set_noprobe(irq);
-#endif
- }
-
- ret = request_threaded_irq(client->irq,
+ ret = devm_request_threaded_irq(&client->dev,
+ client->irq,
NULL,
pca953x_irq_handler,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
@@ -533,28 +588,15 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
if (ret) {
dev_err(&client->dev, "failed to request irq %d\n",
client->irq);
- goto out_irqdesc_free;
+ return ret;
}
chip->gpio_chip.to_irq = pca953x_gpio_to_irq;
}
return 0;
-
-out_irqdesc_free:
- irq_free_descs(chip->irq_base, chip->gpio_chip.ngpio);
-out_failed:
- chip->irq_base = -1;
- return ret;
}
-static void pca953x_irq_teardown(struct pca953x_chip *chip)
-{
- if (chip->irq_base != -1) {
- irq_free_descs(chip->irq_base, chip->gpio_chip.ngpio);
- free_irq(chip->client->irq, chip);
- }
-}
#else /* CONFIG_GPIO_PCA953X_IRQ */
static int pca953x_irq_setup(struct pca953x_chip *chip,
const struct i2c_device_id *id,
@@ -567,10 +609,6 @@ static int pca953x_irq_setup(struct pca953x_chip *chip,
return 0;
}
-
-static void pca953x_irq_teardown(struct pca953x_chip *chip)
-{
-}
#endif
/*
@@ -619,18 +657,24 @@ pca953x_get_alt_pdata(struct i2c_client *client, int *gpio_base, u32 *invert)
static int device_pca953x_init(struct pca953x_chip *chip, u32 invert)
{
int ret;
+ u8 val[MAX_BANK];
- ret = pca953x_read_reg(chip, PCA953X_OUTPUT, &chip->reg_output);
+ ret = pca953x_read_regs(chip, PCA953X_OUTPUT, chip->reg_output);
if (ret)
goto out;
- ret = pca953x_read_reg(chip, PCA953X_DIRECTION,
- &chip->reg_direction);
+ ret = pca953x_read_regs(chip, PCA953X_DIRECTION,
+ chip->reg_direction);
if (ret)
goto out;
/* set platform specific polarity inversion */
- ret = pca953x_write_reg(chip, PCA953X_INVERT, invert);
+ if (invert)
+ memset(val, 0xFF, NBANK(chip));
+ else
+ memset(val, 0, NBANK(chip));
+
+ ret = pca953x_write_regs(chip, PCA953X_INVERT, val);
out:
return ret;
}
@@ -638,28 +682,36 @@ out:
static int device_pca957x_init(struct pca953x_chip *chip, u32 invert)
{
int ret;
- u32 val = 0;
+ u8 val[MAX_BANK];
/* Let every port in proper state, that could save power */
- pca953x_write_reg(chip, PCA957X_PUPD, 0x0);
- pca953x_write_reg(chip, PCA957X_CFG, 0xffff);
- pca953x_write_reg(chip, PCA957X_OUT, 0x0);
-
- ret = pca953x_read_reg(chip, PCA957X_IN, &val);
+ memset(val, 0, NBANK(chip));
+ pca953x_write_regs(chip, PCA957X_PUPD, val);
+ memset(val, 0xFF, NBANK(chip));
+ pca953x_write_regs(chip, PCA957X_CFG, val);
+ memset(val, 0, NBANK(chip));
+ pca953x_write_regs(chip, PCA957X_OUT, val);
+
+ ret = pca953x_read_regs(chip, PCA957X_IN, val);
if (ret)
goto out;
- ret = pca953x_read_reg(chip, PCA957X_OUT, &chip->reg_output);
+ ret = pca953x_read_regs(chip, PCA957X_OUT, chip->reg_output);
if (ret)
goto out;
- ret = pca953x_read_reg(chip, PCA957X_CFG, &chip->reg_direction);
+ ret = pca953x_read_regs(chip, PCA957X_CFG, chip->reg_direction);
if (ret)
goto out;
/* set platform specific polarity inversion */
- pca953x_write_reg(chip, PCA957X_INVRT, invert);
+ if (invert)
+ memset(val, 0xFF, NBANK(chip));
+ else
+ memset(val, 0, NBANK(chip));
+ pca953x_write_regs(chip, PCA957X_INVRT, val);
/* To enable register 6, 7 to controll pull up and pull down */
- pca953x_write_reg(chip, PCA957X_BKEN, 0x202);
+ memset(val, 0x02, NBANK(chip));
+ pca953x_write_regs(chip, PCA957X_BKEN, val);
return 0;
out:
@@ -675,7 +727,8 @@ static int pca953x_probe(struct i2c_client *client,
int ret;
u32 invert = 0;
- chip = kzalloc(sizeof(struct pca953x_chip), GFP_KERNEL);
+ chip = devm_kzalloc(&client->dev,
+ sizeof(struct pca953x_chip), GFP_KERNEL);
if (chip == NULL)
return -ENOMEM;
@@ -710,15 +763,15 @@ static int pca953x_probe(struct i2c_client *client,
else
ret = device_pca957x_init(chip, invert);
if (ret)
- goto out_failed;
+ return ret;
ret = pca953x_irq_setup(chip, id, irq_base);
if (ret)
- goto out_failed;
+ return ret;
ret = gpiochip_add(&chip->gpio_chip);
if (ret)
- goto out_failed_irq;
+ return ret;
if (pdata && pdata->setup) {
ret = pdata->setup(client, chip->gpio_chip.base,
@@ -729,12 +782,6 @@ static int pca953x_probe(struct i2c_client *client,
i2c_set_clientdata(client, chip);
return 0;
-
-out_failed_irq:
- pca953x_irq_teardown(chip);
-out_failed:
- kfree(chip);
- return ret;
}
static int pca953x_remove(struct i2c_client *client)
@@ -760,12 +807,11 @@ static int pca953x_remove(struct i2c_client *client)
return ret;
}
- pca953x_irq_teardown(chip);
- kfree(chip);
return 0;
}
static const struct of_device_id pca953x_dt_ids[] = {
+ { .compatible = "nxp,pca9505", },
{ .compatible = "nxp,pca9534", },
{ .compatible = "nxp,pca9535", },
{ .compatible = "nxp,pca9536", },
diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c
index c1720de18a4..b820869ca93 100644
--- a/drivers/gpio/gpio-pl061.c
+++ b/drivers/gpio/gpio-pl061.c
@@ -365,7 +365,7 @@ static int __init pl061_gpio_init(void)
{
return amba_driver_register(&pl061_gpio_driver);
}
-subsys_initcall(pl061_gpio_init);
+module_init(pl061_gpio_init);
MODULE_AUTHOR("Baruch Siach <baruch@tkos.co.il>");
MODULE_DESCRIPTION("PL061 GPIO driver");
diff --git a/drivers/gpio/gpio-pxa.c b/drivers/gpio/gpio-pxa.c
index 8325f580c0f..9cc108d2b77 100644
--- a/drivers/gpio/gpio-pxa.c
+++ b/drivers/gpio/gpio-pxa.c
@@ -642,12 +642,7 @@ static struct platform_driver pxa_gpio_driver = {
.of_match_table = of_match_ptr(pxa_gpio_dt_ids),
},
};
-
-static int __init pxa_gpio_init(void)
-{
- return platform_driver_register(&pxa_gpio_driver);
-}
-postcore_initcall(pxa_gpio_init);
+module_platform_driver(pxa_gpio_driver);
#ifdef CONFIG_PM
static int pxa_gpio_suspend(void)
diff --git a/drivers/gpio/gpio-twl4030.c b/drivers/gpio/gpio-twl4030.c
index 9572aa137e6..4d330e36da1 100644
--- a/drivers/gpio/gpio-twl4030.c
+++ b/drivers/gpio/gpio-twl4030.c
@@ -37,7 +37,6 @@
#include <linux/i2c/twl.h>
-
/*
* The GPIO "subchip" supports 18 GPIOs which can be configured as
* inputs or outputs, with pullups or pulldowns on each pin. Each
@@ -49,11 +48,6 @@
* There are also two LED pins used sometimes as output-only GPIOs.
*/
-
-static struct gpio_chip twl_gpiochip;
-static int twl4030_gpio_base;
-static int twl4030_gpio_irq_base;
-
/* genirq interfaces are not available to modules */
#ifdef MODULE
#define is_module() true
@@ -69,14 +63,24 @@ static int twl4030_gpio_irq_base;
/* Mask for GPIO registers when aggregated into a 32-bit integer */
#define GPIO_32_MASK 0x0003ffff
-/* Data structures */
-static DEFINE_MUTEX(gpio_lock);
+struct gpio_twl4030_priv {
+ struct gpio_chip gpio_chip;
+ struct mutex mutex;
+ int irq_base;
-/* store usage of each GPIO. - each bit represents one GPIO */
-static unsigned int gpio_usage_count;
+ /* Bitfields for state caching */
+ unsigned int usage_count;
+ unsigned int direction;
+ unsigned int out_state;
+};
/*----------------------------------------------------------------------*/
+static inline struct gpio_twl4030_priv *to_gpio_twl4030(struct gpio_chip *chip)
+{
+ return container_of(chip, struct gpio_twl4030_priv, gpio_chip);
+}
+
/*
* To configure TWL4030 GPIO module registers
*/
@@ -126,7 +130,7 @@ static inline int gpio_twl4030_read(u8 address)
/*----------------------------------------------------------------------*/
-static u8 cached_leden; /* protected by gpio_lock */
+static u8 cached_leden;
/* The LED lines are open drain outputs ... a FET pulls to GND, so an
* external pullup is needed. We could also expose the integrated PWM
@@ -140,14 +144,12 @@ static void twl4030_led_set_value(int led, int value)
if (led)
mask <<= 1;
- mutex_lock(&gpio_lock);
if (value)
cached_leden &= ~mask;
else
cached_leden |= mask;
status = twl_i2c_write_u8(TWL4030_MODULE_LED, cached_leden,
TWL4030_LED_LEDEN_REG);
- mutex_unlock(&gpio_lock);
}
static int twl4030_set_gpio_direction(int gpio, int is_input)
@@ -158,7 +160,6 @@ static int twl4030_set_gpio_direction(int gpio, int is_input)
u8 base = REG_GPIODATADIR1 + d_bnk;
int ret = 0;
- mutex_lock(&gpio_lock);
ret = gpio_twl4030_read(base);
if (ret >= 0) {
if (is_input)
@@ -168,7 +169,6 @@ static int twl4030_set_gpio_direction(int gpio, int is_input)
ret = gpio_twl4030_write(base, reg);
}
- mutex_unlock(&gpio_lock);
return ret;
}
@@ -193,10 +193,6 @@ static int twl4030_get_gpio_datain(int gpio)
u8 base = 0;
int ret = 0;
- if (unlikely((gpio >= TWL4030_GPIO_MAX)
- || !(gpio_usage_count & BIT(gpio))))
- return -EPERM;
-
base = REG_GPIODATAIN1 + d_bnk;
ret = gpio_twl4030_read(base);
if (ret > 0)
@@ -209,9 +205,10 @@ static int twl4030_get_gpio_datain(int gpio)
static int twl_request(struct gpio_chip *chip, unsigned offset)
{
+ struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip);
int status = 0;
- mutex_lock(&gpio_lock);
+ mutex_lock(&priv->mutex);
/* Support the two LED outputs as output-only GPIOs. */
if (offset >= TWL4030_GPIO_MAX) {
@@ -252,7 +249,7 @@ static int twl_request(struct gpio_chip *chip, unsigned offset)
}
/* on first use, turn GPIO module "on" */
- if (!gpio_usage_count) {
+ if (!priv->usage_count) {
struct twl4030_gpio_platform_data *pdata;
u8 value = MASK_GPIO_CTRL_GPIO_ON;
@@ -266,79 +263,120 @@ static int twl_request(struct gpio_chip *chip, unsigned offset)
status = gpio_twl4030_write(REG_GPIO_CTRL, value);
}
+done:
if (!status)
- gpio_usage_count |= (0x1 << offset);
+ priv->usage_count |= BIT(offset);
-done:
- mutex_unlock(&gpio_lock);
+ mutex_unlock(&priv->mutex);
return status;
}
static void twl_free(struct gpio_chip *chip, unsigned offset)
{
+ struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip);
+
+ mutex_lock(&priv->mutex);
if (offset >= TWL4030_GPIO_MAX) {
twl4030_led_set_value(offset - TWL4030_GPIO_MAX, 1);
- return;
+ goto out;
}
- mutex_lock(&gpio_lock);
-
- gpio_usage_count &= ~BIT(offset);
+ priv->usage_count &= ~BIT(offset);
/* on last use, switch off GPIO module */
- if (!gpio_usage_count)
+ if (!priv->usage_count)
gpio_twl4030_write(REG_GPIO_CTRL, 0x0);
- mutex_unlock(&gpio_lock);
+out:
+ mutex_unlock(&priv->mutex);
}
static int twl_direction_in(struct gpio_chip *chip, unsigned offset)
{
- return (offset < TWL4030_GPIO_MAX)
- ? twl4030_set_gpio_direction(offset, 1)
- : -EINVAL;
+ struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip);
+ int ret;
+
+ mutex_lock(&priv->mutex);
+ if (offset < TWL4030_GPIO_MAX)
+ ret = twl4030_set_gpio_direction(offset, 1);
+ else
+ ret = -EINVAL;
+
+ if (!ret)
+ priv->direction &= ~BIT(offset);
+
+ mutex_unlock(&priv->mutex);
+
+ return ret;
}
static int twl_get(struct gpio_chip *chip, unsigned offset)
{
+ struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip);
+ int ret;
int status = 0;
- if (offset < TWL4030_GPIO_MAX)
- status = twl4030_get_gpio_datain(offset);
- else if (offset == TWL4030_GPIO_MAX)
- status = cached_leden & LEDEN_LEDAON;
+ mutex_lock(&priv->mutex);
+ if (!(priv->usage_count & BIT(offset))) {
+ ret = -EPERM;
+ goto out;
+ }
+
+ if (priv->direction & BIT(offset))
+ status = priv->out_state & BIT(offset);
else
- status = cached_leden & LEDEN_LEDBON;
- return (status < 0) ? 0 : status;
+ status = twl4030_get_gpio_datain(offset);
+
+ ret = (status <= 0) ? 0 : 1;
+out:
+ mutex_unlock(&priv->mutex);
+ return ret;
}
-static int twl_direction_out(struct gpio_chip *chip, unsigned offset, int value)
+static void twl_set(struct gpio_chip *chip, unsigned offset, int value)
{
- if (offset < TWL4030_GPIO_MAX) {
+ struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip);
+
+ mutex_lock(&priv->mutex);
+ if (offset < TWL4030_GPIO_MAX)
twl4030_set_gpio_dataout(offset, value);
- return twl4030_set_gpio_direction(offset, 0);
- } else {
+ else
twl4030_led_set_value(offset - TWL4030_GPIO_MAX, value);
- return 0;
- }
+
+ if (value)
+ priv->out_state |= BIT(offset);
+ else
+ priv->out_state &= ~BIT(offset);
+
+ mutex_unlock(&priv->mutex);
}
-static void twl_set(struct gpio_chip *chip, unsigned offset, int value)
+static int twl_direction_out(struct gpio_chip *chip, unsigned offset, int value)
{
+ struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip);
+
+ mutex_lock(&priv->mutex);
if (offset < TWL4030_GPIO_MAX)
twl4030_set_gpio_dataout(offset, value);
- else
- twl4030_led_set_value(offset - TWL4030_GPIO_MAX, value);
+
+ priv->direction |= BIT(offset);
+ mutex_unlock(&priv->mutex);
+
+ twl_set(chip, offset, value);
+
+ return 0;
}
static int twl_to_irq(struct gpio_chip *chip, unsigned offset)
{
- return (twl4030_gpio_irq_base && (offset < TWL4030_GPIO_MAX))
- ? (twl4030_gpio_irq_base + offset)
+ struct gpio_twl4030_priv *priv = to_gpio_twl4030(chip);
+
+ return (priv->irq_base && (offset < TWL4030_GPIO_MAX))
+ ? (priv->irq_base + offset)
: -EINVAL;
}
-static struct gpio_chip twl_gpiochip = {
+static struct gpio_chip template_chip = {
.label = "twl4030",
.owner = THIS_MODULE,
.request = twl_request,
@@ -424,8 +462,14 @@ static int gpio_twl4030_probe(struct platform_device *pdev)
{
struct twl4030_gpio_platform_data *pdata = pdev->dev.platform_data;
struct device_node *node = pdev->dev.of_node;
+ struct gpio_twl4030_priv *priv;
int ret, irq_base;
+ priv = devm_kzalloc(&pdev->dev, sizeof(struct gpio_twl4030_priv),
+ GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
/* maybe setup IRQs */
if (is_module()) {
dev_err(&pdev->dev, "can't dispatch IRQs from modules\n");
@@ -445,12 +489,15 @@ static int gpio_twl4030_probe(struct platform_device *pdev)
if (ret < 0)
return ret;
- twl4030_gpio_irq_base = irq_base;
+ priv->irq_base = irq_base;
no_irqs:
- twl_gpiochip.base = -1;
- twl_gpiochip.ngpio = TWL4030_GPIO_MAX;
- twl_gpiochip.dev = &pdev->dev;
+ priv->gpio_chip = template_chip;
+ priv->gpio_chip.base = -1;
+ priv->gpio_chip.ngpio = TWL4030_GPIO_MAX;
+ priv->gpio_chip.dev = &pdev->dev;
+
+ mutex_init(&priv->mutex);
if (node)
pdata = of_gpio_twl4030(&pdev->dev);
@@ -481,23 +528,23 @@ no_irqs:
* is (still) clear if use_leds is set.
*/
if (pdata->use_leds)
- twl_gpiochip.ngpio += 2;
+ priv->gpio_chip.ngpio += 2;
- ret = gpiochip_add(&twl_gpiochip);
+ ret = gpiochip_add(&priv->gpio_chip);
if (ret < 0) {
dev_err(&pdev->dev, "could not register gpiochip, %d\n", ret);
- twl_gpiochip.ngpio = 0;
+ priv->gpio_chip.ngpio = 0;
gpio_twl4030_remove(pdev);
goto out;
}
- twl4030_gpio_base = twl_gpiochip.base;
+ platform_set_drvdata(pdev, priv);
if (pdata && pdata->setup) {
int status;
- status = pdata->setup(&pdev->dev,
- twl4030_gpio_base, TWL4030_GPIO_MAX);
+ status = pdata->setup(&pdev->dev, priv->gpio_chip.base,
+ TWL4030_GPIO_MAX);
if (status)
dev_dbg(&pdev->dev, "setup --> %d\n", status);
}
@@ -510,18 +557,19 @@ out:
static int gpio_twl4030_remove(struct platform_device *pdev)
{
struct twl4030_gpio_platform_data *pdata = pdev->dev.platform_data;
+ struct gpio_twl4030_priv *priv = platform_get_drvdata(pdev);
int status;
if (pdata && pdata->teardown) {
- status = pdata->teardown(&pdev->dev,
- twl4030_gpio_base, TWL4030_GPIO_MAX);
+ status = pdata->teardown(&pdev->dev, priv->gpio_chip.base,
+ TWL4030_GPIO_MAX);
if (status) {
dev_dbg(&pdev->dev, "teardown --> %d\n", status);
return status;
}
}
- status = gpiochip_remove(&twl_gpiochip);
+ status = gpiochip_remove(&priv->gpio_chip);
if (status < 0)
return status;
diff --git a/drivers/gpio/gpio-vt8500.c b/drivers/gpio/gpio-vt8500.c
index b53320a16fc..81683ca35ac 100644
--- a/drivers/gpio/gpio-vt8500.c
+++ b/drivers/gpio/gpio-vt8500.c
@@ -73,19 +73,20 @@ struct vt8500_gpio_data {
static struct vt8500_gpio_data vt8500_data = {
.num_banks = 7,
.banks = {
+ VT8500_BANK(NO_REG, 0x3C, 0x5C, 0x7C, 9),
VT8500_BANK(0x00, 0x20, 0x40, 0x60, 26),
VT8500_BANK(0x04, 0x24, 0x44, 0x64, 28),
VT8500_BANK(0x08, 0x28, 0x48, 0x68, 31),
VT8500_BANK(0x0C, 0x2C, 0x4C, 0x6C, 19),
VT8500_BANK(0x10, 0x30, 0x50, 0x70, 19),
VT8500_BANK(0x14, 0x34, 0x54, 0x74, 23),
- VT8500_BANK(NO_REG, 0x3C, 0x5C, 0x7C, 9),
},
};
static struct vt8500_gpio_data wm8505_data = {
.num_banks = 10,
.banks = {
+ VT8500_BANK(0x64, 0x8C, 0xB4, 0xDC, 22),
VT8500_BANK(0x40, 0x68, 0x90, 0xB8, 8),
VT8500_BANK(0x44, 0x6C, 0x94, 0xBC, 32),
VT8500_BANK(0x48, 0x70, 0x98, 0xC0, 6),
@@ -95,7 +96,6 @@ static struct vt8500_gpio_data wm8505_data = {
VT8500_BANK(0x58, 0x80, 0xA8, 0xD0, 5),
VT8500_BANK(0x5C, 0x84, 0xAC, 0xD4, 12),
VT8500_BANK(0x60, 0x88, 0xB0, 0xD8, 16),
- VT8500_BANK(0x64, 0x8C, 0xB4, 0xDC, 22),
VT8500_BANK(0x500, 0x504, 0x508, 0x50C, 6),
},
};
@@ -127,6 +127,12 @@ struct vt8500_gpio_chip {
void __iomem *base;
};
+struct vt8500_data {
+ struct vt8500_gpio_chip *chip;
+ void __iomem *iobase;
+ int num_banks;
+};
+
#define to_vt8500(__chip) container_of(__chip, struct vt8500_gpio_chip, chip)
@@ -224,19 +230,32 @@ static int vt8500_of_xlate(struct gpio_chip *gc,
static int vt8500_add_chips(struct platform_device *pdev, void __iomem *base,
const struct vt8500_gpio_data *data)
{
+ struct vt8500_data *priv;
struct vt8500_gpio_chip *vtchip;
struct gpio_chip *chip;
int i;
int pin_cnt = 0;
- vtchip = devm_kzalloc(&pdev->dev,
+ priv = devm_kzalloc(&pdev->dev, sizeof(struct vt8500_data), GFP_KERNEL);
+ if (!priv) {
+ dev_err(&pdev->dev, "failed to allocate memory\n");
+ return -ENOMEM;
+ }
+
+ priv->chip = devm_kzalloc(&pdev->dev,
sizeof(struct vt8500_gpio_chip) * data->num_banks,
GFP_KERNEL);
- if (!vtchip) {
- pr_err("%s: failed to allocate chip memory\n", __func__);
+ if (!priv->chip) {
+ dev_err(&pdev->dev, "failed to allocate chip memory\n");
return -ENOMEM;
}
+ priv->iobase = base;
+ priv->num_banks = data->num_banks;
+ platform_set_drvdata(pdev, priv);
+
+ vtchip = priv->chip;
+
for (i = 0; i < data->num_banks; i++) {
vtchip[i].base = base;
vtchip[i].regs = &data->banks[i];
@@ -273,36 +292,54 @@ static struct of_device_id vt8500_gpio_dt_ids[] = {
static int vt8500_gpio_probe(struct platform_device *pdev)
{
+ int ret;
void __iomem *gpio_base;
- struct device_node *np;
+ struct resource *res;
const struct of_device_id *of_id =
of_match_device(vt8500_gpio_dt_ids, &pdev->dev);
if (!of_id) {
- dev_err(&pdev->dev, "Failed to find gpio controller\n");
+ dev_err(&pdev->dev, "No matching driver data\n");
return -ENODEV;
}
- np = pdev->dev.of_node;
- if (!np) {
- dev_err(&pdev->dev, "Missing GPIO description in devicetree\n");
- return -EFAULT;
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "Unable to get IO resource\n");
+ return -ENODEV;
}
- gpio_base = of_iomap(np, 0);
+ gpio_base = devm_request_and_ioremap(&pdev->dev, res);
if (!gpio_base) {
dev_err(&pdev->dev, "Unable to map GPIO registers\n");
- of_node_put(np);
return -ENOMEM;
}
- vt8500_add_chips(pdev, gpio_base, of_id->data);
+ ret = vt8500_add_chips(pdev, gpio_base, of_id->data);
+
+ return ret;
+}
+
+static int vt8500_gpio_remove(struct platform_device *pdev)
+{
+ int i;
+ int ret;
+ struct vt8500_data *priv = platform_get_drvdata(pdev);
+ struct vt8500_gpio_chip *vtchip = priv->chip;
+
+ for (i = 0; i < priv->num_banks; i++) {
+ ret = gpiochip_remove(&vtchip[i].chip);
+ if (ret)
+ dev_warn(&pdev->dev, "gpiochip_remove returned %d\n",
+ ret);
+ }
return 0;
}
static struct platform_driver vt8500_gpio_driver = {
.probe = vt8500_gpio_probe,
+ .remove = vt8500_gpio_remove,
.driver = {
.name = "vt8500-gpio",
.owner = THIS_MODULE,
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index cbad6e908d3..a063eb04b6c 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -15,6 +15,7 @@
#include <linux/export.h>
#include <linux/acpi_gpio.h>
#include <linux/acpi.h>
+#include <linux/interrupt.h>
static int acpi_gpiochip_find(struct gpio_chip *gc, void *data)
{
@@ -52,3 +53,89 @@ int acpi_get_gpio(char *path, int pin)
return chip->base + pin;
}
EXPORT_SYMBOL_GPL(acpi_get_gpio);
+
+
+static irqreturn_t acpi_gpio_irq_handler(int irq, void *data)
+{
+ acpi_handle handle = data;
+
+ acpi_evaluate_object(handle, NULL, NULL, NULL);
+
+ return IRQ_HANDLED;
+}
+
+/**
+ * acpi_gpiochip_request_interrupts() - Register isr for gpio chip ACPI events
+ * @chip: gpio chip
+ *
+ * ACPI5 platforms can use GPIO signaled ACPI events. These GPIO interrupts are
+ * handled by ACPI event methods which need to be called from the GPIO
+ * chip's interrupt handler. acpi_gpiochip_request_interrupts finds out which
+ * gpio pins have acpi event methods and assigns interrupt handlers that calls
+ * the acpi event methods for those pins.
+ *
+ * Interrupts are automatically freed on driver detach
+ */
+
+void acpi_gpiochip_request_interrupts(struct gpio_chip *chip)
+{
+ struct acpi_buffer buf = {ACPI_ALLOCATE_BUFFER, NULL};
+ struct acpi_resource *res;
+ acpi_handle handle, ev_handle;
+ acpi_status status;
+ unsigned int pin;
+ int irq, ret;
+ char ev_name[5];
+
+ if (!chip->dev || !chip->to_irq)
+ return;
+
+ handle = ACPI_HANDLE(chip->dev);
+ if (!handle)
+ return;
+
+ status = acpi_get_event_resources(handle, &buf);
+ if (ACPI_FAILURE(status))
+ return;
+
+ /* If a gpio interrupt has an acpi event handler method, then
+ * set up an interrupt handler that calls the acpi event handler
+ */
+
+ for (res = buf.pointer;
+ res && (res->type != ACPI_RESOURCE_TYPE_END_TAG);
+ res = ACPI_NEXT_RESOURCE(res)) {
+
+ if (res->type != ACPI_RESOURCE_TYPE_GPIO ||
+ res->data.gpio.connection_type !=
+ ACPI_RESOURCE_GPIO_TYPE_INT)
+ continue;
+
+ pin = res->data.gpio.pin_table[0];
+ if (pin > chip->ngpio)
+ continue;
+
+ sprintf(ev_name, "_%c%02X",
+ res->data.gpio.triggering ? 'E' : 'L', pin);
+
+ status = acpi_get_handle(handle, ev_name, &ev_handle);
+ if (ACPI_FAILURE(status))
+ continue;
+
+ irq = chip->to_irq(chip, pin);
+ if (irq < 0)
+ continue;
+
+ /* Assume BIOS sets the triggering, so no flags */
+ ret = devm_request_threaded_irq(chip->dev, irq, NULL,
+ acpi_gpio_irq_handler,
+ 0,
+ "GPIO-signaled-ACPI-event",
+ ev_handle);
+ if (ret)
+ dev_err(chip->dev,
+ "Failed to request IRQ %d ACPI event handler\n",
+ irq);
+ }
+}
+EXPORT_SYMBOL(acpi_gpiochip_request_interrupts);
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 5359ca78130..4828fe7c66c 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -3,6 +3,7 @@
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/spinlock.h>
+#include <linux/list.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/debugfs.h>
@@ -52,14 +53,13 @@ struct gpio_desc {
/* flag symbols are bit numbers */
#define FLAG_REQUESTED 0
#define FLAG_IS_OUT 1
-#define FLAG_RESERVED 2
-#define FLAG_EXPORT 3 /* protected by sysfs_lock */
-#define FLAG_SYSFS 4 /* exported via /sys/class/gpio/control */
-#define FLAG_TRIG_FALL 5 /* trigger on falling edge */
-#define FLAG_TRIG_RISE 6 /* trigger on rising edge */
-#define FLAG_ACTIVE_LOW 7 /* sysfs value has active low */
-#define FLAG_OPEN_DRAIN 8 /* Gpio is open drain type */
-#define FLAG_OPEN_SOURCE 9 /* Gpio is open source type */
+#define FLAG_EXPORT 2 /* protected by sysfs_lock */
+#define FLAG_SYSFS 3 /* exported via /sys/class/gpio/control */
+#define FLAG_TRIG_FALL 4 /* trigger on falling edge */
+#define FLAG_TRIG_RISE 5 /* trigger on rising edge */
+#define FLAG_ACTIVE_LOW 6 /* sysfs value has active low */
+#define FLAG_OPEN_DRAIN 7 /* Gpio is open drain type */
+#define FLAG_OPEN_SOURCE 8 /* Gpio is open source type */
#define ID_SHIFT 16 /* add new flags before this one */
@@ -72,10 +72,36 @@ struct gpio_desc {
};
static struct gpio_desc gpio_desc[ARCH_NR_GPIOS];
+#define GPIO_OFFSET_VALID(chip, offset) (offset >= 0 && offset < chip->ngpio)
+
+static LIST_HEAD(gpio_chips);
+
#ifdef CONFIG_GPIO_SYSFS
static DEFINE_IDR(dirent_idr);
#endif
+/*
+ * Internal gpiod_* API using descriptors instead of the integer namespace.
+ * Most of this should eventually go public.
+ */
+static int gpiod_request(struct gpio_desc *desc, const char *label);
+static void gpiod_free(struct gpio_desc *desc);
+static int gpiod_direction_input(struct gpio_desc *desc);
+static int gpiod_direction_output(struct gpio_desc *desc, int value);
+static int gpiod_set_debounce(struct gpio_desc *desc, unsigned debounce);
+static int gpiod_get_value_cansleep(struct gpio_desc *desc);
+static void gpiod_set_value_cansleep(struct gpio_desc *desc, int value);
+static int gpiod_get_value(struct gpio_desc *desc);
+static void gpiod_set_value(struct gpio_desc *desc, int value);
+static int gpiod_cansleep(struct gpio_desc *desc);
+static int gpiod_to_irq(struct gpio_desc *desc);
+static int gpiod_export(struct gpio_desc *desc, bool direction_may_change);
+static int gpiod_export_link(struct device *dev, const char *name,
+ struct gpio_desc *desc);
+static int gpiod_sysfs_set_active_low(struct gpio_desc *desc, int value);
+static void gpiod_unexport(struct gpio_desc *desc);
+
+
static inline void desc_set_label(struct gpio_desc *d, const char *label)
{
#ifdef CONFIG_DEBUG_FS
@@ -83,6 +109,36 @@ static inline void desc_set_label(struct gpio_desc *d, const char *label)
#endif
}
+/*
+ * Return the GPIO number of the passed descriptor relative to its chip
+ */
+static int gpio_chip_hwgpio(const struct gpio_desc *desc)
+{
+ return desc - &desc->chip->desc[0];
+}
+
+/**
+ * Convert a GPIO number to its descriptor
+ */
+static struct gpio_desc *gpio_to_desc(unsigned gpio)
+{
+ if (WARN(!gpio_is_valid(gpio), "invalid GPIO %d\n", gpio))
+ return NULL;
+ else
+ return &gpio_desc[gpio];
+}
+
+/**
+ * Convert a GPIO descriptor to the integer namespace.
+ * This should disappear in the future but is needed since we still
+ * use GPIO numbers for error messages and sysfs nodes
+ */
+static int desc_to_gpio(const struct gpio_desc *desc)
+{
+ return desc->chip->base + gpio_chip_hwgpio(desc);
+}
+
+
/* Warn when drivers omit gpio_request() calls -- legal but ill-advised
* when setting direction, and otherwise illegal. Until board setup code
* and drivers use explicit requests everywhere (which won't happen when
@@ -94,10 +150,10 @@ static inline void desc_set_label(struct gpio_desc *d, const char *label)
* only "legal" in the sense that (old) code using it won't break yet,
* but instead only triggers a WARN() stack dump.
*/
-static int gpio_ensure_requested(struct gpio_desc *desc, unsigned offset)
+static int gpio_ensure_requested(struct gpio_desc *desc)
{
const struct gpio_chip *chip = desc->chip;
- const int gpio = chip->base + offset;
+ const int gpio = desc_to_gpio(desc);
if (WARN(test_and_set_bit(FLAG_REQUESTED, &desc->flags) == 0,
"autorequest GPIO-%d\n", gpio)) {
@@ -116,95 +172,54 @@ static int gpio_ensure_requested(struct gpio_desc *desc, unsigned offset)
}
/* caller holds gpio_lock *OR* gpio is marked as requested */
+static struct gpio_chip *gpiod_to_chip(struct gpio_desc *desc)
+{
+ return desc->chip;
+}
+
struct gpio_chip *gpio_to_chip(unsigned gpio)
{
- return gpio_desc[gpio].chip;
+ return gpiod_to_chip(gpio_to_desc(gpio));
}
/* dynamic allocation of GPIOs, e.g. on a hotplugged device */
static int gpiochip_find_base(int ngpio)
{
- int i;
- int spare = 0;
- int base = -ENOSPC;
-
- for (i = ARCH_NR_GPIOS - 1; i >= 0 ; i--) {
- struct gpio_desc *desc = &gpio_desc[i];
- struct gpio_chip *chip = desc->chip;
+ struct gpio_chip *chip;
+ int base = ARCH_NR_GPIOS - ngpio;
- if (!chip && !test_bit(FLAG_RESERVED, &desc->flags)) {
- spare++;
- if (spare == ngpio) {
- base = i;
- break;
- }
- } else {
- spare = 0;
- if (chip)
- i -= chip->ngpio - 1;
- }
+ list_for_each_entry_reverse(chip, &gpio_chips, list) {
+ /* found a free space? */
+ if (chip->base + chip->ngpio <= base)
+ break;
+ else
+ /* nope, check the space right before the chip */
+ base = chip->base - ngpio;
}
- if (gpio_is_valid(base))
+ if (gpio_is_valid(base)) {
pr_debug("%s: found new base at %d\n", __func__, base);
- return base;
-}
-
-/**
- * gpiochip_reserve() - reserve range of gpios to use with platform code only
- * @start: starting gpio number
- * @ngpio: number of gpios to reserve
- * Context: platform init, potentially before irqs or kmalloc will work
- *
- * Returns a negative errno if any gpio within the range is already reserved
- * or registered, else returns zero as a success code. Use this function
- * to mark a range of gpios as unavailable for dynamic gpio number allocation,
- * for example because its driver support is not yet loaded.
- */
-int __init gpiochip_reserve(int start, int ngpio)
-{
- int ret = 0;
- unsigned long flags;
- int i;
-
- if (!gpio_is_valid(start) || !gpio_is_valid(start + ngpio - 1))
- return -EINVAL;
-
- spin_lock_irqsave(&gpio_lock, flags);
-
- for (i = start; i < start + ngpio; i++) {
- struct gpio_desc *desc = &gpio_desc[i];
-
- if (desc->chip || test_bit(FLAG_RESERVED, &desc->flags)) {
- ret = -EBUSY;
- goto err;
- }
-
- set_bit(FLAG_RESERVED, &desc->flags);
+ return base;
+ } else {
+ pr_err("%s: cannot find free range\n", __func__);
+ return -ENOSPC;
}
-
- pr_debug("%s: reserved gpios from %d to %d\n",
- __func__, start, start + ngpio - 1);
-err:
- spin_unlock_irqrestore(&gpio_lock, flags);
-
- return ret;
}
/* caller ensures gpio is valid and requested, chip->get_direction may sleep */
-static int gpio_get_direction(unsigned gpio)
+static int gpiod_get_direction(struct gpio_desc *desc)
{
struct gpio_chip *chip;
- struct gpio_desc *desc = &gpio_desc[gpio];
+ unsigned offset;
int status = -EINVAL;
- chip = gpio_to_chip(gpio);
- gpio -= chip->base;
+ chip = gpiod_to_chip(desc);
+ offset = gpio_chip_hwgpio(desc);
if (!chip->get_direction)
return status;
- status = chip->get_direction(chip, gpio);
+ status = chip->get_direction(chip, offset);
if (status > 0) {
/* GPIOF_DIR_IN, or other positive */
status = 1;
@@ -248,19 +263,19 @@ static DEFINE_MUTEX(sysfs_lock);
static ssize_t gpio_direction_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- const struct gpio_desc *desc = dev_get_drvdata(dev);
- unsigned gpio = desc - gpio_desc;
+ struct gpio_desc *desc = dev_get_drvdata(dev);
ssize_t status;
mutex_lock(&sysfs_lock);
- if (!test_bit(FLAG_EXPORT, &desc->flags))
+ if (!test_bit(FLAG_EXPORT, &desc->flags)) {
status = -EIO;
- else
- gpio_get_direction(gpio);
+ } else {
+ gpiod_get_direction(desc);
status = sprintf(buf, "%s\n",
test_bit(FLAG_IS_OUT, &desc->flags)
? "out" : "in");
+ }
mutex_unlock(&sysfs_lock);
return status;
@@ -269,8 +284,7 @@ static ssize_t gpio_direction_show(struct device *dev,
static ssize_t gpio_direction_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
- const struct gpio_desc *desc = dev_get_drvdata(dev);
- unsigned gpio = desc - gpio_desc;
+ struct gpio_desc *desc = dev_get_drvdata(dev);
ssize_t status;
mutex_lock(&sysfs_lock);
@@ -278,11 +292,11 @@ static ssize_t gpio_direction_store(struct device *dev,
if (!test_bit(FLAG_EXPORT, &desc->flags))
status = -EIO;
else if (sysfs_streq(buf, "high"))
- status = gpio_direction_output(gpio, 1);
+ status = gpiod_direction_output(desc, 1);
else if (sysfs_streq(buf, "out") || sysfs_streq(buf, "low"))
- status = gpio_direction_output(gpio, 0);
+ status = gpiod_direction_output(desc, 0);
else if (sysfs_streq(buf, "in"))
- status = gpio_direction_input(gpio);
+ status = gpiod_direction_input(desc);
else
status = -EINVAL;
@@ -296,8 +310,7 @@ static /* const */ DEVICE_ATTR(direction, 0644,
static ssize_t gpio_value_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- const struct gpio_desc *desc = dev_get_drvdata(dev);
- unsigned gpio = desc - gpio_desc;
+ struct gpio_desc *desc = dev_get_drvdata(dev);
ssize_t status;
mutex_lock(&sysfs_lock);
@@ -307,7 +320,7 @@ static ssize_t gpio_value_show(struct device *dev,
} else {
int value;
- value = !!gpio_get_value_cansleep(gpio);
+ value = !!gpiod_get_value_cansleep(desc);
if (test_bit(FLAG_ACTIVE_LOW, &desc->flags))
value = !value;
@@ -321,8 +334,7 @@ static ssize_t gpio_value_show(struct device *dev,
static ssize_t gpio_value_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t size)
{
- const struct gpio_desc *desc = dev_get_drvdata(dev);
- unsigned gpio = desc - gpio_desc;
+ struct gpio_desc *desc = dev_get_drvdata(dev);
ssize_t status;
mutex_lock(&sysfs_lock);
@@ -338,7 +350,7 @@ static ssize_t gpio_value_store(struct device *dev,
if (status == 0) {
if (test_bit(FLAG_ACTIVE_LOW, &desc->flags))
value = !value;
- gpio_set_value_cansleep(gpio, value != 0);
+ gpiod_set_value_cansleep(desc, value != 0);
status = size;
}
}
@@ -368,7 +380,7 @@ static int gpio_setup_irq(struct gpio_desc *desc, struct device *dev,
if ((desc->flags & GPIO_TRIGGER_MASK) == gpio_flags)
return 0;
- irq = gpio_to_irq(desc - gpio_desc);
+ irq = gpiod_to_irq(desc);
if (irq < 0)
return -EIO;
@@ -638,29 +650,32 @@ static ssize_t export_store(struct class *class,
struct class_attribute *attr,
const char *buf, size_t len)
{
- long gpio;
- int status;
+ long gpio;
+ struct gpio_desc *desc;
+ int status;
status = strict_strtol(buf, 0, &gpio);
if (status < 0)
goto done;
+ desc = gpio_to_desc(gpio);
+
/* No extra locking here; FLAG_SYSFS just signifies that the
* request and export were done by on behalf of userspace, so
* they may be undone on its behalf too.
*/
- status = gpio_request(gpio, "sysfs");
+ status = gpiod_request(desc, "sysfs");
if (status < 0) {
if (status == -EPROBE_DEFER)
status = -ENODEV;
goto done;
}
- status = gpio_export(gpio, true);
+ status = gpiod_export(desc, true);
if (status < 0)
- gpio_free(gpio);
+ gpiod_free(desc);
else
- set_bit(FLAG_SYSFS, &gpio_desc[gpio].flags);
+ set_bit(FLAG_SYSFS, &desc->flags);
done:
if (status)
@@ -672,8 +687,9 @@ static ssize_t unexport_store(struct class *class,
struct class_attribute *attr,
const char *buf, size_t len)
{
- long gpio;
- int status;
+ long gpio;
+ struct gpio_desc *desc;
+ int status;
status = strict_strtol(buf, 0, &gpio);
if (status < 0)
@@ -681,17 +697,18 @@ static ssize_t unexport_store(struct class *class,
status = -EINVAL;
+ desc = gpio_to_desc(gpio);
/* reject bogus commands (gpio_unexport ignores them) */
- if (!gpio_is_valid(gpio))
+ if (!desc)
goto done;
/* No extra locking here; FLAG_SYSFS just signifies that the
* request and export were done by on behalf of userspace, so
* they may be undone on its behalf too.
*/
- if (test_and_clear_bit(FLAG_SYSFS, &gpio_desc[gpio].flags)) {
+ if (test_and_clear_bit(FLAG_SYSFS, &desc->flags)) {
status = 0;
- gpio_free(gpio);
+ gpiod_free(desc);
}
done:
if (status)
@@ -728,13 +745,13 @@ static struct class gpio_class = {
*
* Returns zero on success, else an error.
*/
-int gpio_export(unsigned gpio, bool direction_may_change)
+static int gpiod_export(struct gpio_desc *desc, bool direction_may_change)
{
unsigned long flags;
- struct gpio_desc *desc;
int status;
const char *ioname = NULL;
struct device *dev;
+ int offset;
/* can't export until sysfs is available ... */
if (!gpio_class.p) {
@@ -742,20 +759,19 @@ int gpio_export(unsigned gpio, bool direction_may_change)
return -ENOENT;
}
- if (!gpio_is_valid(gpio)) {
- pr_debug("%s: gpio %d is not valid\n", __func__, gpio);
+ if (!desc) {
+ pr_debug("%s: invalid gpio descriptor\n", __func__);
return -EINVAL;
}
mutex_lock(&sysfs_lock);
spin_lock_irqsave(&gpio_lock, flags);
- desc = &gpio_desc[gpio];
if (!test_bit(FLAG_REQUESTED, &desc->flags) ||
test_bit(FLAG_EXPORT, &desc->flags)) {
spin_unlock_irqrestore(&gpio_lock, flags);
pr_debug("%s: gpio %d unavailable (requested=%d, exported=%d)\n",
- __func__, gpio,
+ __func__, desc_to_gpio(desc),
test_bit(FLAG_REQUESTED, &desc->flags),
test_bit(FLAG_EXPORT, &desc->flags));
status = -EPERM;
@@ -766,11 +782,13 @@ int gpio_export(unsigned gpio, bool direction_may_change)
direction_may_change = false;
spin_unlock_irqrestore(&gpio_lock, flags);
- if (desc->chip->names && desc->chip->names[gpio - desc->chip->base])
- ioname = desc->chip->names[gpio - desc->chip->base];
+ offset = gpio_chip_hwgpio(desc);
+ if (desc->chip->names && desc->chip->names[offset])
+ ioname = desc->chip->names[offset];
dev = device_create(&gpio_class, desc->chip->dev, MKDEV(0, 0),
- desc, ioname ? ioname : "gpio%u", gpio);
+ desc, ioname ? ioname : "gpio%u",
+ desc_to_gpio(desc));
if (IS_ERR(dev)) {
status = PTR_ERR(dev);
goto fail_unlock;
@@ -786,7 +804,7 @@ int gpio_export(unsigned gpio, bool direction_may_change)
goto fail_unregister_device;
}
- if (gpio_to_irq(gpio) >= 0 && (direction_may_change ||
+ if (gpiod_to_irq(desc) >= 0 && (direction_may_change ||
!test_bit(FLAG_IS_OUT, &desc->flags))) {
status = device_create_file(dev, &dev_attr_edge);
if (status)
@@ -801,9 +819,15 @@ fail_unregister_device:
device_unregister(dev);
fail_unlock:
mutex_unlock(&sysfs_lock);
- pr_debug("%s: gpio%d status %d\n", __func__, gpio, status);
+ pr_debug("%s: gpio%d status %d\n", __func__, desc_to_gpio(desc),
+ status);
return status;
}
+
+int gpio_export(unsigned gpio, bool direction_may_change)
+{
+ return gpiod_export(gpio_to_desc(gpio), direction_may_change);
+}
EXPORT_SYMBOL_GPL(gpio_export);
static int match_export(struct device *dev, const void *data)
@@ -822,18 +846,16 @@ static int match_export(struct device *dev, const void *data)
*
* Returns zero on success, else an error.
*/
-int gpio_export_link(struct device *dev, const char *name, unsigned gpio)
+static int gpiod_export_link(struct device *dev, const char *name,
+ struct gpio_desc *desc)
{
- struct gpio_desc *desc;
int status = -EINVAL;
- if (!gpio_is_valid(gpio))
+ if (!desc)
goto done;
mutex_lock(&sysfs_lock);
- desc = &gpio_desc[gpio];
-
if (test_bit(FLAG_EXPORT, &desc->flags)) {
struct device *tdev;
@@ -850,12 +872,17 @@ int gpio_export_link(struct device *dev, const char *name, unsigned gpio)
done:
if (status)
- pr_debug("%s: gpio%d status %d\n", __func__, gpio, status);
+ pr_debug("%s: gpio%d status %d\n", __func__, desc_to_gpio(desc),
+ status);
return status;
}
-EXPORT_SYMBOL_GPL(gpio_export_link);
+int gpio_export_link(struct device *dev, const char *name, unsigned gpio)
+{
+ return gpiod_export_link(dev, name, gpio_to_desc(gpio));
+}
+EXPORT_SYMBOL_GPL(gpio_export_link);
/**
* gpio_sysfs_set_active_low - set the polarity of gpio sysfs value
@@ -869,19 +896,16 @@ EXPORT_SYMBOL_GPL(gpio_export_link);
*
* Returns zero on success, else an error.
*/
-int gpio_sysfs_set_active_low(unsigned gpio, int value)
+static int gpiod_sysfs_set_active_low(struct gpio_desc *desc, int value)
{
- struct gpio_desc *desc;
struct device *dev = NULL;
int status = -EINVAL;
- if (!gpio_is_valid(gpio))
+ if (!desc)
goto done;
mutex_lock(&sysfs_lock);
- desc = &gpio_desc[gpio];
-
if (test_bit(FLAG_EXPORT, &desc->flags)) {
dev = class_find_device(&gpio_class, NULL, desc, match_export);
if (dev == NULL) {
@@ -897,10 +921,16 @@ unlock:
done:
if (status)
- pr_debug("%s: gpio%d status %d\n", __func__, gpio, status);
+ pr_debug("%s: gpio%d status %d\n", __func__, desc_to_gpio(desc),
+ status);
return status;
}
+
+int gpio_sysfs_set_active_low(unsigned gpio, int value)
+{
+ return gpiod_sysfs_set_active_low(gpio_to_desc(gpio), value);
+}
EXPORT_SYMBOL_GPL(gpio_sysfs_set_active_low);
/**
@@ -909,21 +939,18 @@ EXPORT_SYMBOL_GPL(gpio_sysfs_set_active_low);
*
* This is implicit on gpio_free().
*/
-void gpio_unexport(unsigned gpio)
+static void gpiod_unexport(struct gpio_desc *desc)
{
- struct gpio_desc *desc;
int status = 0;
struct device *dev = NULL;
- if (!gpio_is_valid(gpio)) {
+ if (!desc) {
status = -EINVAL;
goto done;
}
mutex_lock(&sysfs_lock);
- desc = &gpio_desc[gpio];
-
if (test_bit(FLAG_EXPORT, &desc->flags)) {
dev = class_find_device(&gpio_class, NULL, desc, match_export);
@@ -935,13 +962,20 @@ void gpio_unexport(unsigned gpio)
}
mutex_unlock(&sysfs_lock);
+
if (dev) {
device_unregister(dev);
put_device(dev);
}
done:
if (status)
- pr_debug("%s: gpio%d status %d\n", __func__, gpio, status);
+ pr_debug("%s: gpio%d status %d\n", __func__, desc_to_gpio(desc),
+ status);
+}
+
+void gpio_unexport(unsigned gpio)
+{
+ gpiod_unexport(gpio_to_desc(gpio));
}
EXPORT_SYMBOL_GPL(gpio_unexport);
@@ -975,9 +1009,9 @@ static int gpiochip_export(struct gpio_chip *chip)
unsigned gpio;
spin_lock_irqsave(&gpio_lock, flags);
- gpio = chip->base;
- while (gpio_desc[gpio].chip == chip)
- gpio_desc[gpio++].chip = NULL;
+ gpio = 0;
+ while (gpio < chip->ngpio)
+ chip->desc[gpio++].chip = NULL;
spin_unlock_irqrestore(&gpio_lock, flags);
pr_debug("%s: chip %s status %d\n", __func__,
@@ -1012,7 +1046,7 @@ static int __init gpiolib_sysfs_init(void)
{
int status;
unsigned long flags;
- unsigned gpio;
+ struct gpio_chip *chip;
status = class_register(&gpio_class);
if (status < 0)
@@ -1025,10 +1059,7 @@ static int __init gpiolib_sysfs_init(void)
* registered, and so arch_initcall() can always gpio_export().
*/
spin_lock_irqsave(&gpio_lock, flags);
- for (gpio = 0; gpio < ARCH_NR_GPIOS; gpio++) {
- struct gpio_chip *chip;
-
- chip = gpio_desc[gpio].chip;
+ list_for_each_entry(chip, &gpio_chips, list) {
if (!chip || chip->exported)
continue;
@@ -1053,8 +1084,66 @@ static inline void gpiochip_unexport(struct gpio_chip *chip)
{
}
+static inline int gpiod_export(struct gpio_desc *desc,
+ bool direction_may_change)
+{
+ return -ENOSYS;
+}
+
+static inline int gpiod_export_link(struct device *dev, const char *name,
+ struct gpio_desc *desc)
+{
+ return -ENOSYS;
+}
+
+static inline int gpiod_sysfs_set_active_low(struct gpio_desc *desc, int value)
+{
+ return -ENOSYS;
+}
+
+static inline void gpiod_unexport(struct gpio_desc *desc)
+{
+}
+
#endif /* CONFIG_GPIO_SYSFS */
+/*
+ * Add a new chip to the global chips list, keeping the list of chips sorted
+ * by base order.
+ *
+ * Return -EBUSY if the new chip overlaps with some other chip's integer
+ * space.
+ */
+static int gpiochip_add_to_list(struct gpio_chip *chip)
+{
+ struct list_head *pos = &gpio_chips;
+ struct gpio_chip *_chip;
+ int err = 0;
+
+ /* find where to insert our chip */
+ list_for_each(pos, &gpio_chips) {
+ _chip = list_entry(pos, struct gpio_chip, list);
+ /* shall we insert before _chip? */
+ if (_chip->base >= chip->base + chip->ngpio)
+ break;
+ }
+
+ /* are we stepping on the chip right before? */
+ if (pos != &gpio_chips && pos->prev != &gpio_chips) {
+ _chip = list_entry(pos->prev, struct gpio_chip, list);
+ if (_chip->base + _chip->ngpio > chip->base) {
+ dev_err(chip->dev,
+ "GPIO integer space overlap, cannot add chip\n");
+ err = -EBUSY;
+ }
+ }
+
+ if (!err)
+ list_add_tail(&chip->list, pos);
+
+ return err;
+}
+
/**
* gpiochip_add() - register a gpio_chip
* @chip: the chip to register, with chip->base initialized
@@ -1096,16 +1185,14 @@ int gpiochip_add(struct gpio_chip *chip)
chip->base = base;
}
- /* these GPIO numbers must not be managed by another gpio_chip */
- for (id = base; id < base + chip->ngpio; id++) {
- if (gpio_desc[id].chip != NULL) {
- status = -EBUSY;
- break;
- }
- }
+ status = gpiochip_add_to_list(chip);
+
if (status == 0) {
- for (id = base; id < base + chip->ngpio; id++) {
- gpio_desc[id].chip = chip;
+ chip->desc = &gpio_desc[chip->base];
+
+ for (id = 0; id < chip->ngpio; id++) {
+ struct gpio_desc *desc = &chip->desc[id];
+ desc->chip = chip;
/* REVISIT: most hardware initializes GPIOs as
* inputs (often with pullups enabled) so power
@@ -1114,7 +1201,7 @@ int gpiochip_add(struct gpio_chip *chip)
* and in case chip->get_direction is not set,
* we may expose the wrong direction in sysfs.
*/
- gpio_desc[id].flags = !chip->direction_input
+ desc->flags = !chip->direction_input
? (1 << FLAG_IS_OUT)
: 0;
}
@@ -1167,15 +1254,17 @@ int gpiochip_remove(struct gpio_chip *chip)
gpiochip_remove_pin_ranges(chip);
of_gpiochip_remove(chip);
- for (id = chip->base; id < chip->base + chip->ngpio; id++) {
- if (test_bit(FLAG_REQUESTED, &gpio_desc[id].flags)) {
+ for (id = 0; id < chip->ngpio; id++) {
+ if (test_bit(FLAG_REQUESTED, &chip->desc[id].flags)) {
status = -EBUSY;
break;
}
}
if (status == 0) {
- for (id = chip->base; id < chip->base + chip->ngpio; id++)
- gpio_desc[id].chip = NULL;
+ for (id = 0; id < chip->ngpio; id++)
+ chip->desc[id].chip = NULL;
+
+ list_del(&chip->list);
}
spin_unlock_irqrestore(&gpio_lock, flags);
@@ -1202,20 +1291,17 @@ struct gpio_chip *gpiochip_find(void *data,
int (*match)(struct gpio_chip *chip,
void *data))
{
- struct gpio_chip *chip = NULL;
+ struct gpio_chip *chip;
unsigned long flags;
- int i;
spin_lock_irqsave(&gpio_lock, flags);
- for (i = 0; i < ARCH_NR_GPIOS; i++) {
- if (!gpio_desc[i].chip)
- continue;
-
- if (match(gpio_desc[i].chip, data)) {
- chip = gpio_desc[i].chip;
+ list_for_each_entry(chip, &gpio_chips, list)
+ if (match(chip, data))
break;
- }
- }
+
+ /* No match? */
+ if (&chip->list == &gpio_chips)
+ chip = NULL;
spin_unlock_irqrestore(&gpio_lock, flags);
return chip;
@@ -1297,20 +1383,18 @@ EXPORT_SYMBOL_GPL(gpiochip_remove_pin_ranges);
* on each other, and help provide better diagnostics in debugfs.
* They're called even less than the "set direction" calls.
*/
-int gpio_request(unsigned gpio, const char *label)
+static int gpiod_request(struct gpio_desc *desc, const char *label)
{
- struct gpio_desc *desc;
struct gpio_chip *chip;
int status = -EPROBE_DEFER;
unsigned long flags;
spin_lock_irqsave(&gpio_lock, flags);
- if (!gpio_is_valid(gpio)) {
+ if (!desc) {
status = -EINVAL;
goto done;
}
- desc = &gpio_desc[gpio];
chip = desc->chip;
if (chip == NULL)
goto done;
@@ -1334,7 +1418,7 @@ int gpio_request(unsigned gpio, const char *label)
if (chip->request) {
/* chip->request may sleep */
spin_unlock_irqrestore(&gpio_lock, flags);
- status = chip->request(chip, gpio - chip->base);
+ status = chip->request(chip, gpio_chip_hwgpio(desc));
spin_lock_irqsave(&gpio_lock, flags);
if (status < 0) {
@@ -1347,42 +1431,46 @@ int gpio_request(unsigned gpio, const char *label)
if (chip->get_direction) {
/* chip->get_direction may sleep */
spin_unlock_irqrestore(&gpio_lock, flags);
- gpio_get_direction(gpio);
+ gpiod_get_direction(desc);
spin_lock_irqsave(&gpio_lock, flags);
}
done:
if (status)
- pr_debug("gpio_request: gpio-%d (%s) status %d\n",
- gpio, label ? : "?", status);
+ pr_debug("_gpio_request: gpio-%d (%s) status %d\n",
+ desc ? desc_to_gpio(desc) : -1,
+ label ? : "?", status);
spin_unlock_irqrestore(&gpio_lock, flags);
return status;
}
+
+int gpio_request(unsigned gpio, const char *label)
+{
+ return gpiod_request(gpio_to_desc(gpio), label);
+}
EXPORT_SYMBOL_GPL(gpio_request);
-void gpio_free(unsigned gpio)
+static void gpiod_free(struct gpio_desc *desc)
{
unsigned long flags;
- struct gpio_desc *desc;
struct gpio_chip *chip;
might_sleep();
- if (!gpio_is_valid(gpio)) {
+ if (!desc) {
WARN_ON(extra_checks);
return;
}
- gpio_unexport(gpio);
+ gpiod_unexport(desc);
spin_lock_irqsave(&gpio_lock, flags);
- desc = &gpio_desc[gpio];
chip = desc->chip;
if (chip && test_bit(FLAG_REQUESTED, &desc->flags)) {
if (chip->free) {
spin_unlock_irqrestore(&gpio_lock, flags);
might_sleep_if(chip->can_sleep);
- chip->free(chip, gpio - chip->base);
+ chip->free(chip, gpio_chip_hwgpio(desc));
spin_lock_irqsave(&gpio_lock, flags);
}
desc_set_label(desc, NULL);
@@ -1396,6 +1484,11 @@ void gpio_free(unsigned gpio)
spin_unlock_irqrestore(&gpio_lock, flags);
}
+
+void gpio_free(unsigned gpio)
+{
+ gpiod_free(gpio_to_desc(gpio));
+}
EXPORT_SYMBOL_GPL(gpio_free);
/**
@@ -1406,29 +1499,32 @@ EXPORT_SYMBOL_GPL(gpio_free);
*/
int gpio_request_one(unsigned gpio, unsigned long flags, const char *label)
{
+ struct gpio_desc *desc;
int err;
- err = gpio_request(gpio, label);
+ desc = gpio_to_desc(gpio);
+
+ err = gpiod_request(desc, label);
if (err)
return err;
if (flags & GPIOF_OPEN_DRAIN)
- set_bit(FLAG_OPEN_DRAIN, &gpio_desc[gpio].flags);
+ set_bit(FLAG_OPEN_DRAIN, &desc->flags);
if (flags & GPIOF_OPEN_SOURCE)
- set_bit(FLAG_OPEN_SOURCE, &gpio_desc[gpio].flags);
+ set_bit(FLAG_OPEN_SOURCE, &desc->flags);
if (flags & GPIOF_DIR_IN)
- err = gpio_direction_input(gpio);
+ err = gpiod_direction_input(desc);
else
- err = gpio_direction_output(gpio,
+ err = gpiod_direction_output(desc,
(flags & GPIOF_INIT_HIGH) ? 1 : 0);
if (err)
goto free_gpio;
if (flags & GPIOF_EXPORT) {
- err = gpio_export(gpio, flags & GPIOF_EXPORT_CHANGEABLE);
+ err = gpiod_export(desc, flags & GPIOF_EXPORT_CHANGEABLE);
if (err)
goto free_gpio;
}
@@ -1436,7 +1532,7 @@ int gpio_request_one(unsigned gpio, unsigned long flags, const char *label)
return 0;
free_gpio:
- gpio_free(gpio);
+ gpiod_free(desc);
return err;
}
EXPORT_SYMBOL_GPL(gpio_request_one);
@@ -1491,14 +1587,17 @@ EXPORT_SYMBOL_GPL(gpio_free_array);
*/
const char *gpiochip_is_requested(struct gpio_chip *chip, unsigned offset)
{
- unsigned gpio = chip->base + offset;
+ struct gpio_desc *desc;
- if (!gpio_is_valid(gpio) || gpio_desc[gpio].chip != chip)
+ if (!GPIO_OFFSET_VALID(chip, offset))
return NULL;
- if (test_bit(FLAG_REQUESTED, &gpio_desc[gpio].flags) == 0)
+
+ desc = &chip->desc[offset];
+
+ if (test_bit(FLAG_REQUESTED, &desc->flags) == 0)
return NULL;
#ifdef CONFIG_DEBUG_FS
- return gpio_desc[gpio].label;
+ return desc->label;
#else
return "?";
#endif
@@ -1515,24 +1614,21 @@ EXPORT_SYMBOL_GPL(gpiochip_is_requested);
* rely on gpio_request() having been called beforehand.
*/
-int gpio_direction_input(unsigned gpio)
+static int gpiod_direction_input(struct gpio_desc *desc)
{
unsigned long flags;
struct gpio_chip *chip;
- struct gpio_desc *desc = &gpio_desc[gpio];
int status = -EINVAL;
+ int offset;
spin_lock_irqsave(&gpio_lock, flags);
- if (!gpio_is_valid(gpio))
+ if (!desc)
goto fail;
chip = desc->chip;
if (!chip || !chip->get || !chip->direction_input)
goto fail;
- gpio -= chip->base;
- if (gpio >= chip->ngpio)
- goto fail;
- status = gpio_ensure_requested(desc, gpio);
+ status = gpio_ensure_requested(desc);
if (status < 0)
goto fail;
@@ -1542,11 +1638,12 @@ int gpio_direction_input(unsigned gpio)
might_sleep_if(chip->can_sleep);
+ offset = gpio_chip_hwgpio(desc);
if (status) {
- status = chip->request(chip, gpio);
+ status = chip->request(chip, offset);
if (status < 0) {
pr_debug("GPIO-%d: chip request fail, %d\n",
- chip->base + gpio, status);
+ desc_to_gpio(desc), status);
/* and it's not available to anyone else ...
* gpio_request() is the fully clean solution.
*/
@@ -1554,48 +1651,54 @@ int gpio_direction_input(unsigned gpio)
}
}
- status = chip->direction_input(chip, gpio);
+ status = chip->direction_input(chip, offset);
if (status == 0)
clear_bit(FLAG_IS_OUT, &desc->flags);
- trace_gpio_direction(chip->base + gpio, 1, status);
+ trace_gpio_direction(desc_to_gpio(desc), 1, status);
lose:
return status;
fail:
spin_unlock_irqrestore(&gpio_lock, flags);
- if (status)
+ if (status) {
+ int gpio = -1;
+ if (desc)
+ gpio = desc_to_gpio(desc);
pr_debug("%s: gpio-%d status %d\n",
__func__, gpio, status);
+ }
return status;
}
+
+int gpio_direction_input(unsigned gpio)
+{
+ return gpiod_direction_input(gpio_to_desc(gpio));
+}
EXPORT_SYMBOL_GPL(gpio_direction_input);
-int gpio_direction_output(unsigned gpio, int value)
+static int gpiod_direction_output(struct gpio_desc *desc, int value)
{
unsigned long flags;
struct gpio_chip *chip;
- struct gpio_desc *desc = &gpio_desc[gpio];
int status = -EINVAL;
+ int offset;
/* Open drain pin should not be driven to 1 */
if (value && test_bit(FLAG_OPEN_DRAIN, &desc->flags))
- return gpio_direction_input(gpio);
+ return gpiod_direction_input(desc);
/* Open source pin should not be driven to 0 */
if (!value && test_bit(FLAG_OPEN_SOURCE, &desc->flags))
- return gpio_direction_input(gpio);
+ return gpiod_direction_input(desc);
spin_lock_irqsave(&gpio_lock, flags);
- if (!gpio_is_valid(gpio))
+ if (!desc)
goto fail;
chip = desc->chip;
if (!chip || !chip->set || !chip->direction_output)
goto fail;
- gpio -= chip->base;
- if (gpio >= chip->ngpio)
- goto fail;
- status = gpio_ensure_requested(desc, gpio);
+ status = gpio_ensure_requested(desc);
if (status < 0)
goto fail;
@@ -1605,11 +1708,12 @@ int gpio_direction_output(unsigned gpio, int value)
might_sleep_if(chip->can_sleep);
+ offset = gpio_chip_hwgpio(desc);
if (status) {
- status = chip->request(chip, gpio);
+ status = chip->request(chip, offset);
if (status < 0) {
pr_debug("GPIO-%d: chip request fail, %d\n",
- chip->base + gpio, status);
+ desc_to_gpio(desc), status);
/* and it's not available to anyone else ...
* gpio_request() is the fully clean solution.
*/
@@ -1617,20 +1721,29 @@ int gpio_direction_output(unsigned gpio, int value)
}
}
- status = chip->direction_output(chip, gpio, value);
+ status = chip->direction_output(chip, offset, value);
if (status == 0)
set_bit(FLAG_IS_OUT, &desc->flags);
- trace_gpio_value(chip->base + gpio, 0, value);
- trace_gpio_direction(chip->base + gpio, 0, status);
+ trace_gpio_value(desc_to_gpio(desc), 0, value);
+ trace_gpio_direction(desc_to_gpio(desc), 0, status);
lose:
return status;
fail:
spin_unlock_irqrestore(&gpio_lock, flags);
- if (status)
+ if (status) {
+ int gpio = -1;
+ if (desc)
+ gpio = desc_to_gpio(desc);
pr_debug("%s: gpio-%d status %d\n",
__func__, gpio, status);
+ }
return status;
}
+
+int gpio_direction_output(unsigned gpio, int value)
+{
+ return gpiod_direction_output(gpio_to_desc(gpio), value);
+}
EXPORT_SYMBOL_GPL(gpio_direction_output);
/**
@@ -1638,24 +1751,22 @@ EXPORT_SYMBOL_GPL(gpio_direction_output);
* @gpio: the gpio to set debounce time
* @debounce: debounce time is microseconds
*/
-int gpio_set_debounce(unsigned gpio, unsigned debounce)
+static int gpiod_set_debounce(struct gpio_desc *desc, unsigned debounce)
{
unsigned long flags;
struct gpio_chip *chip;
- struct gpio_desc *desc = &gpio_desc[gpio];
int status = -EINVAL;
+ int offset;
spin_lock_irqsave(&gpio_lock, flags);
- if (!gpio_is_valid(gpio))
+ if (!desc)
goto fail;
chip = desc->chip;
if (!chip || !chip->set || !chip->set_debounce)
goto fail;
- gpio -= chip->base;
- if (gpio >= chip->ngpio)
- goto fail;
- status = gpio_ensure_requested(desc, gpio);
+
+ status = gpio_ensure_requested(desc);
if (status < 0)
goto fail;
@@ -1665,16 +1776,26 @@ int gpio_set_debounce(unsigned gpio, unsigned debounce)
might_sleep_if(chip->can_sleep);
- return chip->set_debounce(chip, gpio, debounce);
+ offset = gpio_chip_hwgpio(desc);
+ return chip->set_debounce(chip, offset, debounce);
fail:
spin_unlock_irqrestore(&gpio_lock, flags);
- if (status)
+ if (status) {
+ int gpio = -1;
+ if (desc)
+ gpio = desc_to_gpio(desc);
pr_debug("%s: gpio-%d status %d\n",
__func__, gpio, status);
+ }
return status;
}
+
+int gpio_set_debounce(unsigned gpio, unsigned debounce)
+{
+ return gpiod_set_debounce(gpio_to_desc(gpio), debounce);
+}
EXPORT_SYMBOL_GPL(gpio_set_debounce);
/* I/O calls are only valid after configuration completed; the relevant
@@ -1708,18 +1829,25 @@ EXPORT_SYMBOL_GPL(gpio_set_debounce);
* It returns the zero or nonzero value provided by the associated
* gpio_chip.get() method; or zero if no such method is provided.
*/
-int __gpio_get_value(unsigned gpio)
+static int gpiod_get_value(struct gpio_desc *desc)
{
struct gpio_chip *chip;
int value;
+ int offset;
- chip = gpio_to_chip(gpio);
+ chip = desc->chip;
+ offset = gpio_chip_hwgpio(desc);
/* Should be using gpio_get_value_cansleep() */
WARN_ON(chip->can_sleep);
- value = chip->get ? chip->get(chip, gpio - chip->base) : 0;
- trace_gpio_value(gpio, 1, value);
+ value = chip->get ? chip->get(chip, offset) : 0;
+ trace_gpio_value(desc_to_gpio(desc), 1, value);
return value;
}
+
+int __gpio_get_value(unsigned gpio)
+{
+ return gpiod_get_value(gpio_to_desc(gpio));
+}
EXPORT_SYMBOL_GPL(__gpio_get_value);
/*
@@ -1728,23 +1856,25 @@ EXPORT_SYMBOL_GPL(__gpio_get_value);
* @chip: Gpio chip.
* @value: Non-zero for setting it HIGH otherise it will set to LOW.
*/
-static void _gpio_set_open_drain_value(unsigned gpio,
- struct gpio_chip *chip, int value)
+static void _gpio_set_open_drain_value(struct gpio_desc *desc, int value)
{
int err = 0;
+ struct gpio_chip *chip = desc->chip;
+ int offset = gpio_chip_hwgpio(desc);
+
if (value) {
- err = chip->direction_input(chip, gpio - chip->base);
+ err = chip->direction_input(chip, offset);
if (!err)
- clear_bit(FLAG_IS_OUT, &gpio_desc[gpio].flags);
+ clear_bit(FLAG_IS_OUT, &desc->flags);
} else {
- err = chip->direction_output(chip, gpio - chip->base, 0);
+ err = chip->direction_output(chip, offset, 0);
if (!err)
- set_bit(FLAG_IS_OUT, &gpio_desc[gpio].flags);
+ set_bit(FLAG_IS_OUT, &desc->flags);
}
- trace_gpio_direction(gpio, value, err);
+ trace_gpio_direction(desc_to_gpio(desc), value, err);
if (err < 0)
pr_err("%s: Error in set_value for open drain gpio%d err %d\n",
- __func__, gpio, err);
+ __func__, desc_to_gpio(desc), err);
}
/*
@@ -1753,26 +1883,27 @@ static void _gpio_set_open_drain_value(unsigned gpio,
* @chip: Gpio chip.
* @value: Non-zero for setting it HIGH otherise it will set to LOW.
*/
-static void _gpio_set_open_source_value(unsigned gpio,
- struct gpio_chip *chip, int value)
+static void _gpio_set_open_source_value(struct gpio_desc *desc, int value)
{
int err = 0;
+ struct gpio_chip *chip = desc->chip;
+ int offset = gpio_chip_hwgpio(desc);
+
if (value) {
- err = chip->direction_output(chip, gpio - chip->base, 1);
+ err = chip->direction_output(chip, offset, 1);
if (!err)
- set_bit(FLAG_IS_OUT, &gpio_desc[gpio].flags);
+ set_bit(FLAG_IS_OUT, &desc->flags);
} else {
- err = chip->direction_input(chip, gpio - chip->base);
+ err = chip->direction_input(chip, offset);
if (!err)
- clear_bit(FLAG_IS_OUT, &gpio_desc[gpio].flags);
+ clear_bit(FLAG_IS_OUT, &desc->flags);
}
- trace_gpio_direction(gpio, !value, err);
+ trace_gpio_direction(desc_to_gpio(desc), !value, err);
if (err < 0)
pr_err("%s: Error in set_value for open source gpio%d err %d\n",
- __func__, gpio, err);
+ __func__, desc_to_gpio(desc), err);
}
-
/**
* __gpio_set_value() - assign a gpio's value
* @gpio: gpio whose value will be assigned
@@ -1782,20 +1913,25 @@ static void _gpio_set_open_source_value(unsigned gpio,
* This is used directly or indirectly to implement gpio_set_value().
* It invokes the associated gpio_chip.set() method.
*/
-void __gpio_set_value(unsigned gpio, int value)
+static void gpiod_set_value(struct gpio_desc *desc, int value)
{
struct gpio_chip *chip;
- chip = gpio_to_chip(gpio);
+ chip = desc->chip;
/* Should be using gpio_set_value_cansleep() */
WARN_ON(chip->can_sleep);
- trace_gpio_value(gpio, 0, value);
- if (test_bit(FLAG_OPEN_DRAIN, &gpio_desc[gpio].flags))
- _gpio_set_open_drain_value(gpio, chip, value);
- else if (test_bit(FLAG_OPEN_SOURCE, &gpio_desc[gpio].flags))
- _gpio_set_open_source_value(gpio, chip, value);
+ trace_gpio_value(desc_to_gpio(desc), 0, value);
+ if (test_bit(FLAG_OPEN_DRAIN, &desc->flags))
+ _gpio_set_open_drain_value(desc, value);
+ else if (test_bit(FLAG_OPEN_SOURCE, &desc->flags))
+ _gpio_set_open_source_value(desc, value);
else
- chip->set(chip, gpio - chip->base, value);
+ chip->set(chip, gpio_chip_hwgpio(desc), value);
+}
+
+void __gpio_set_value(unsigned gpio, int value)
+{
+ return gpiod_set_value(gpio_to_desc(gpio), value);
}
EXPORT_SYMBOL_GPL(__gpio_set_value);
@@ -1807,14 +1943,15 @@ EXPORT_SYMBOL_GPL(__gpio_set_value);
* This is used directly or indirectly to implement gpio_cansleep(). It
* returns nonzero if access reading or writing the GPIO value can sleep.
*/
-int __gpio_cansleep(unsigned gpio)
+static int gpiod_cansleep(struct gpio_desc *desc)
{
- struct gpio_chip *chip;
-
/* only call this on GPIOs that are valid! */
- chip = gpio_to_chip(gpio);
+ return desc->chip->can_sleep;
+}
- return chip->can_sleep;
+int __gpio_cansleep(unsigned gpio)
+{
+ return gpiod_cansleep(gpio_to_desc(gpio));
}
EXPORT_SYMBOL_GPL(__gpio_cansleep);
@@ -1827,50 +1964,67 @@ EXPORT_SYMBOL_GPL(__gpio_cansleep);
* It returns the number of the IRQ signaled by this (input) GPIO,
* or a negative errno.
*/
-int __gpio_to_irq(unsigned gpio)
+static int gpiod_to_irq(struct gpio_desc *desc)
{
struct gpio_chip *chip;
+ int offset;
- chip = gpio_to_chip(gpio);
- return chip->to_irq ? chip->to_irq(chip, gpio - chip->base) : -ENXIO;
+ chip = desc->chip;
+ offset = gpio_chip_hwgpio(desc);
+ return chip->to_irq ? chip->to_irq(chip, offset) : -ENXIO;
}
-EXPORT_SYMBOL_GPL(__gpio_to_irq);
+int __gpio_to_irq(unsigned gpio)
+{
+ return gpiod_to_irq(gpio_to_desc(gpio));
+}
+EXPORT_SYMBOL_GPL(__gpio_to_irq);
/* There's no value in making it easy to inline GPIO calls that may sleep.
* Common examples include ones connected to I2C or SPI chips.
*/
-int gpio_get_value_cansleep(unsigned gpio)
+static int gpiod_get_value_cansleep(struct gpio_desc *desc)
{
struct gpio_chip *chip;
int value;
+ int offset;
might_sleep_if(extra_checks);
- chip = gpio_to_chip(gpio);
- value = chip->get ? chip->get(chip, gpio - chip->base) : 0;
- trace_gpio_value(gpio, 1, value);
+ chip = desc->chip;
+ offset = gpio_chip_hwgpio(desc);
+ value = chip->get ? chip->get(chip, offset) : 0;
+ trace_gpio_value(desc_to_gpio(desc), 1, value);
return value;
}
+
+int gpio_get_value_cansleep(unsigned gpio)
+{
+ return gpiod_get_value_cansleep(gpio_to_desc(gpio));
+}
EXPORT_SYMBOL_GPL(gpio_get_value_cansleep);
-void gpio_set_value_cansleep(unsigned gpio, int value)
+static void gpiod_set_value_cansleep(struct gpio_desc *desc, int value)
{
struct gpio_chip *chip;
might_sleep_if(extra_checks);
- chip = gpio_to_chip(gpio);
- trace_gpio_value(gpio, 0, value);
- if (test_bit(FLAG_OPEN_DRAIN, &gpio_desc[gpio].flags))
- _gpio_set_open_drain_value(gpio, chip, value);
- else if (test_bit(FLAG_OPEN_SOURCE, &gpio_desc[gpio].flags))
- _gpio_set_open_source_value(gpio, chip, value);
+ chip = desc->chip;
+ trace_gpio_value(desc_to_gpio(desc), 0, value);
+ if (test_bit(FLAG_OPEN_DRAIN, &desc->flags))
+ _gpio_set_open_drain_value(desc, value);
+ else if (test_bit(FLAG_OPEN_SOURCE, &desc->flags))
+ _gpio_set_open_source_value(desc, value);
else
- chip->set(chip, gpio - chip->base, value);
+ chip->set(chip, gpio_chip_hwgpio(desc), value);
}
-EXPORT_SYMBOL_GPL(gpio_set_value_cansleep);
+void gpio_set_value_cansleep(unsigned gpio, int value)
+{
+ return gpiod_set_value_cansleep(gpio_to_desc(gpio), value);
+}
+EXPORT_SYMBOL_GPL(gpio_set_value_cansleep);
#ifdef CONFIG_DEBUG_FS
@@ -1878,14 +2032,14 @@ static void gpiolib_dbg_show(struct seq_file *s, struct gpio_chip *chip)
{
unsigned i;
unsigned gpio = chip->base;
- struct gpio_desc *gdesc = &gpio_desc[gpio];
+ struct gpio_desc *gdesc = &chip->desc[0];
int is_out;
for (i = 0; i < chip->ngpio; i++, gpio++, gdesc++) {
if (!test_bit(FLAG_REQUESTED, &gdesc->flags))
continue;
- gpio_get_direction(gpio);
+ gpiod_get_direction(gdesc);
is_out = test_bit(FLAG_IS_OUT, &gdesc->flags);
seq_printf(s, " gpio-%-3d (%-20.20s) %s %s",
gpio, gdesc->label,
@@ -1899,46 +2053,35 @@ static void gpiolib_dbg_show(struct seq_file *s, struct gpio_chip *chip)
static void *gpiolib_seq_start(struct seq_file *s, loff_t *pos)
{
+ unsigned long flags;
struct gpio_chip *chip = NULL;
- unsigned int gpio;
- void *ret = NULL;
- loff_t index = 0;
-
- /* REVISIT this isn't locked against gpio_chip removal ... */
+ loff_t index = *pos;
- for (gpio = 0; gpio_is_valid(gpio); gpio++) {
- if (gpio_desc[gpio].chip == chip)
- continue;
-
- chip = gpio_desc[gpio].chip;
- if (!chip)
- continue;
+ s->private = "";
- if (index++ >= *pos) {
- ret = chip;
- break;
+ spin_lock_irqsave(&gpio_lock, flags);
+ list_for_each_entry(chip, &gpio_chips, list)
+ if (index-- == 0) {
+ spin_unlock_irqrestore(&gpio_lock, flags);
+ return chip;
}
- }
-
- s->private = "";
+ spin_unlock_irqrestore(&gpio_lock, flags);
- return ret;
+ return NULL;
}
static void *gpiolib_seq_next(struct seq_file *s, void *v, loff_t *pos)
{
+ unsigned long flags;
struct gpio_chip *chip = v;
- unsigned int gpio;
void *ret = NULL;
- /* skip GPIOs provided by the current chip */
- for (gpio = chip->base + chip->ngpio; gpio_is_valid(gpio); gpio++) {
- chip = gpio_desc[gpio].chip;
- if (chip) {
- ret = chip;
- break;
- }
- }
+ spin_lock_irqsave(&gpio_lock, flags);
+ if (list_is_last(&chip->list, &gpio_chips))
+ ret = NULL;
+ else
+ ret = list_entry(chip->list.next, struct gpio_chip, list);
+ spin_unlock_irqrestore(&gpio_lock, flags);
s->private = "\n";
++*pos;