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authorLinus Torvalds <torvalds@linux-foundation.org>2017-09-13 10:56:00 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-13 10:56:00 -0700
commit561a8eb3e1d219f415597c76dae44b530b7f961a (patch)
treedbeb3fc432535bd0b921cebaad32ad078d8c2c56
parent2818d0d759bc3d763d834097292006d2da3271df (diff)
parentb4be271cebb6f8b475f8bf2199091be8fe4c4278 (diff)
download96b-common-561a8eb3e1d219f415597c76dae44b530b7f961a.tar.gz
Merge tag 'rtc-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
Pull RTC updates from Alexandre Belloni: "Subsystem: - remove .open() and .release() RTC ops - constify i2c_device_id New driver: - Realtek RTD1295 - Android emulator (goldfish) RTC Drivers: - ds1307: Beginning of a huge cleanup - s35390a: handle invalid RTC time - sun6i: external oscillator gate support" * tag 'rtc-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (40 commits) rtc: ds1307: use octal permissions rtc: ds1307: fix braces rtc: ds1307: fix alignments and blank lines rtc: ds1307: use BIT rtc: ds1307: use u32 rtc: ds1307: use sizeof rtc: ds1307: remove regs member rtc: Add Realtek RTD1295 dt-bindings: rtc: Add Realtek RTD1295 rtc: sun6i: Add support for the external oscillator gate rtc: goldfish: Add RTC driver for Android emulator dt-bindings: Add device tree binding for Goldfish RTC driver rtc: ds1307: add basic support for ds1341 chip rtc: ds1307: remove member nvram_offset from struct ds1307 rtc: ds1307: factor out offset to struct chip_desc rtc: ds1307: factor out rtc_ops to struct chip_desc rtc: ds1307: factor out irq_handler to struct chip_desc rtc: ds1307: improve irq setup rtc: ds1307: constify struct chip_desc variables rtc: ds1307: improve trickle charger initialization ...
-rw-r--r--Documentation/devicetree/bindings/power/wakeup-source.txt9
-rw-r--r--Documentation/devicetree/bindings/rtc/google,goldfish-rtc.txt17
-rw-r--r--Documentation/devicetree/bindings/rtc/isil,isl12057.txt1
-rw-r--r--Documentation/devicetree/bindings/rtc/realtek,rtd119x.txt16
-rw-r--r--Documentation/devicetree/bindings/rtc/sun6i-rtc.txt4
-rw-r--r--MAINTAINERS6
-rw-r--r--drivers/rtc/Kconfig30
-rw-r--r--drivers/rtc/Makefile2
-rw-r--r--drivers/rtc/rtc-dev.c20
-rw-r--r--drivers/rtc/rtc-ds1307.c457
-rw-r--r--drivers/rtc/rtc-ds1672.c2
-rw-r--r--drivers/rtc/rtc-em3027.c2
-rw-r--r--drivers/rtc/rtc-goldfish.c237
-rw-r--r--drivers/rtc/rtc-m41t80.c67
-rw-r--r--drivers/rtc/rtc-max6900.c2
-rw-r--r--drivers/rtc/rtc-max8925.c2
-rw-r--r--drivers/rtc/rtc-mxc.c21
-rw-r--r--drivers/rtc/rtc-puv3.c72
-rw-r--r--drivers/rtc/rtc-pxa.c4
-rw-r--r--drivers/rtc/rtc-rtd119x.c242
-rw-r--r--drivers/rtc/rtc-rv3029c2.c2
-rw-r--r--drivers/rtc/rtc-s35390a.c104
-rw-r--r--drivers/rtc/rtc-sa1100.c65
-rw-r--r--drivers/rtc/rtc-sun6i.c34
-rw-r--r--drivers/rtc/rtc-vr41xx.c18
-rw-r--r--include/linux/rtc.h2
26 files changed, 953 insertions, 485 deletions
diff --git a/Documentation/devicetree/bindings/power/wakeup-source.txt b/Documentation/devicetree/bindings/power/wakeup-source.txt
index 963c6dfd484d..3c81f78b5c27 100644
--- a/Documentation/devicetree/bindings/power/wakeup-source.txt
+++ b/Documentation/devicetree/bindings/power/wakeup-source.txt
@@ -20,13 +20,12 @@ List of legacy properties and respective binding document
1. "enable-sdio-wakeup" Documentation/devicetree/bindings/mmc/mmc.txt
2. "gpio-key,wakeup" Documentation/devicetree/bindings/input/gpio-keys{,-polled}.txt
3. "has-tpo" Documentation/devicetree/bindings/rtc/rtc-opal.txt
-4. "isil,irq2-can-wakeup-machine" Documentation/devicetree/bindings/rtc/isil,isl12057.txt
-5. "linux,wakeup" Documentation/devicetree/bindings/input/gpio-matrix-keypad.txt
+4. "linux,wakeup" Documentation/devicetree/bindings/input/gpio-matrix-keypad.txt
Documentation/devicetree/bindings/mfd/tc3589x.txt
Documentation/devicetree/bindings/input/ads7846.txt
-6. "linux,keypad-wakeup" Documentation/devicetree/bindings/input/qcom,pm8xxx-keypad.txt
-7. "linux,input-wakeup" Documentation/devicetree/bindings/input/samsung-keypad.txt
-8. "nvidia,wakeup-source" Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt
+5. "linux,keypad-wakeup" Documentation/devicetree/bindings/input/qcom,pm8xxx-keypad.txt
+6. "linux,input-wakeup" Documentation/devicetree/bindings/input/samsung-keypad.txt
+7. "nvidia,wakeup-source" Documentation/devicetree/bindings/input/nvidia,tegra20-kbc.txt
Examples
--------
diff --git a/Documentation/devicetree/bindings/rtc/google,goldfish-rtc.txt b/Documentation/devicetree/bindings/rtc/google,goldfish-rtc.txt
new file mode 100644
index 000000000000..634312dd95ca
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/google,goldfish-rtc.txt
@@ -0,0 +1,17 @@
+Android Goldfish RTC
+
+Android Goldfish RTC device used by Android emulator.
+
+Required properties:
+
+- compatible : should contain "google,goldfish-rtc"
+- reg : <registers mapping>
+- interrupts : <interrupt mapping>
+
+Example:
+
+ goldfish_timer@9020000 {
+ compatible = "google,goldfish-rtc";
+ reg = <0x9020000 0x1000>;
+ interrupts = <0x3>;
+ };
diff --git a/Documentation/devicetree/bindings/rtc/isil,isl12057.txt b/Documentation/devicetree/bindings/rtc/isil,isl12057.txt
index cf83e0940302..fbbdd92e5af9 100644
--- a/Documentation/devicetree/bindings/rtc/isil,isl12057.txt
+++ b/Documentation/devicetree/bindings/rtc/isil,isl12057.txt
@@ -24,7 +24,6 @@ Optional properties:
- "wakeup-source": mark the chip as a wakeup source, independently of
the availability of an IRQ line connected to the SoC.
- (Legacy property supported: "isil,irq2-can-wakeup-machine")
- "interrupt-parent", "interrupts": for passing the interrupt line
of the SoC connected to IRQ#2 of the RTC chip.
diff --git a/Documentation/devicetree/bindings/rtc/realtek,rtd119x.txt b/Documentation/devicetree/bindings/rtc/realtek,rtd119x.txt
new file mode 100644
index 000000000000..bbf1ccb5df31
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/realtek,rtd119x.txt
@@ -0,0 +1,16 @@
+Realtek RTD129x Real-Time Clock
+===============================
+
+Required properties:
+- compatible : Should be "realtek,rtd1295-rtc"
+- reg : Specifies the physical base address and size
+- clocks : Specifies the clock gate
+
+
+Example:
+
+ rtc@9801b600 {
+ compatible = "realtek,rtd1295-clk";
+ reg = <0x9801b600 0x100>;
+ clocks = <&clkc RTD1295_CLK_EN_MISC_RTC>;
+ };
diff --git a/Documentation/devicetree/bindings/rtc/sun6i-rtc.txt b/Documentation/devicetree/bindings/rtc/sun6i-rtc.txt
index 945934918b71..d5e26d313f62 100644
--- a/Documentation/devicetree/bindings/rtc/sun6i-rtc.txt
+++ b/Documentation/devicetree/bindings/rtc/sun6i-rtc.txt
@@ -10,7 +10,7 @@ Required properties:
Required properties for new device trees
- clocks : phandle to the 32kHz external oscillator
-- clock-output-names : name of the LOSC clock created
+- clock-output-names : names of the LOSC and its external output clocks created
- #clock-cells : must be equals to 1. The RTC provides two clocks: the
LOSC and its external output, with index 0 and 1
respectively.
@@ -21,7 +21,7 @@ rtc: rtc@01f00000 {
compatible = "allwinner,sun6i-a31-rtc";
reg = <0x01f00000 0x54>;
interrupts = <0 40 4>, <0 41 4>;
- clock-output-names = "osc32k";
+ clock-output-names = "osc32k", "osc32k-out";
clocks = <&ext_osc32k>;
#clock-cells = <1>;
};
diff --git a/MAINTAINERS b/MAINTAINERS
index f46a3225e398..048586a2a9be 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -855,6 +855,12 @@ S: Supported
F: drivers/android/
F: drivers/staging/android/
+ANDROID GOLDFISH RTC DRIVER
+M: Miodrag Dinic <miodrag.dinic@imgtec.com>
+S: Supported
+F: Documentation/devicetree/bindings/rtc/google,goldfish-rtc.txt
+F: drivers/rtc/rtc-goldfish.c
+
ANDROID ION DRIVER
M: Laura Abbott <labbott@redhat.com>
M: Sumit Semwal <sumit.semwal@linaro.org>
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 72419ac2c52a..e0e58f3b1420 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -227,14 +227,14 @@ config RTC_DRV_AS3722
will be called rtc-as3722.
config RTC_DRV_DS1307
- tristate "Dallas/Maxim DS1307/37/38/39/40, ST M41T00, EPSON RX-8025, ISL12057"
+ tristate "Dallas/Maxim DS1307/37/38/39/40/41, ST M41T00, EPSON RX-8025, ISL12057"
help
If you say yes here you get support for various compatible RTC
chips (often with battery backup) connected with I2C. This driver
- should handle DS1307, DS1337, DS1338, DS1339, DS1340, ST M41T00,
- EPSON RX-8025, Intersil ISL12057 and probably other chips. In some
- cases the RTC must already have been initialized (by manufacturing or
- a bootloader).
+ should handle DS1307, DS1337, DS1338, DS1339, DS1340, DS1341,
+ ST M41T00, EPSON RX-8025, Intersil ISL12057 and probably other chips.
+ In some cases the RTC must already have been initialized (by
+ manufacturing or a bootloader).
The first seven registers on these chips hold an RTC, and other
registers may add features such as NVRAM, a trickle charger for
@@ -371,11 +371,11 @@ config RTC_DRV_MAX77686
will be called rtc-max77686.
config RTC_DRV_RK808
- tristate "Rockchip RK808/RK818 RTC"
+ tristate "Rockchip RK805/RK808/RK818 RTC"
depends on MFD_RK808
help
If you say yes here you will get support for the
- RTC of RK808 and RK818 PMIC.
+ RTC of RK805, RK808 and RK818 PMIC.
This driver can also be built as a module. If so, the module
will be called rk808-rtc.
@@ -1765,6 +1765,14 @@ config RTC_DRV_CPCAP
Say y here for CPCAP rtc found on some Motorola phones
and tablets such as Droid 4.
+config RTC_DRV_RTD119X
+ bool "Realtek RTD129x RTC"
+ depends on ARCH_REALTEK || COMPILE_TEST
+ default ARCH_REALTEK
+ help
+ If you say yes here, you get support for the RTD1295 SoC
+ Real Time Clock.
+
comment "HID Sensor RTC drivers"
config RTC_DRV_HID_SENSOR_TIME
@@ -1780,5 +1788,13 @@ config RTC_DRV_HID_SENSOR_TIME
If this driver is compiled as a module, it will be named
rtc-hid-sensor-time.
+config RTC_DRV_GOLDFISH
+ tristate "Goldfish Real Time Clock"
+ depends on MIPS && (GOLDFISH || COMPILE_TEST)
+ help
+ Say yes to enable RTC driver for the Goldfish based virtual platform.
+
+ Goldfish is a code name for the virtual platform developed by Google
+ for Android emulation.
endif # RTC_CLASS
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index acd366b41c85..7230014c92af 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -131,6 +131,7 @@ obj-$(CONFIG_RTC_DRV_RP5C01) += rtc-rp5c01.o
obj-$(CONFIG_RTC_DRV_RS5C313) += rtc-rs5c313.o
obj-$(CONFIG_RTC_DRV_RS5C348) += rtc-rs5c348.o
obj-$(CONFIG_RTC_DRV_RS5C372) += rtc-rs5c372.o
+obj-$(CONFIG_RTC_DRV_RTD119X) += rtc-rtd119x.o
obj-$(CONFIG_RTC_DRV_RV3029C2) += rtc-rv3029c2.o
obj-$(CONFIG_RTC_DRV_RV8803) += rtc-rv8803.o
obj-$(CONFIG_RTC_DRV_RX4581) += rtc-rx4581.o
@@ -170,3 +171,4 @@ obj-$(CONFIG_RTC_DRV_WM8350) += rtc-wm8350.o
obj-$(CONFIG_RTC_DRV_X1205) += rtc-x1205.o
obj-$(CONFIG_RTC_DRV_XGENE) += rtc-xgene.o
obj-$(CONFIG_RTC_DRV_ZYNQMP) += rtc-zynqmp.o
+obj-$(CONFIG_RTC_DRV_GOLDFISH) += rtc-goldfish.o
diff --git a/drivers/rtc/rtc-dev.c b/drivers/rtc/rtc-dev.c
index 794bc4fa4937..00efe24a6063 100644
--- a/drivers/rtc/rtc-dev.c
+++ b/drivers/rtc/rtc-dev.c
@@ -24,28 +24,19 @@ static dev_t rtc_devt;
static int rtc_dev_open(struct inode *inode, struct file *file)
{
- int err;
struct rtc_device *rtc = container_of(inode->i_cdev,
struct rtc_device, char_dev);
- const struct rtc_class_ops *ops = rtc->ops;
if (test_and_set_bit_lock(RTC_DEV_BUSY, &rtc->flags))
return -EBUSY;
file->private_data = rtc;
- err = ops->open ? ops->open(rtc->dev.parent) : 0;
- if (err == 0) {
- spin_lock_irq(&rtc->irq_lock);
- rtc->irq_data = 0;
- spin_unlock_irq(&rtc->irq_lock);
-
- return 0;
- }
+ spin_lock_irq(&rtc->irq_lock);
+ rtc->irq_data = 0;
+ spin_unlock_irq(&rtc->irq_lock);
- /* something has gone wrong */
- clear_bit_unlock(RTC_DEV_BUSY, &rtc->flags);
- return err;
+ return 0;
}
#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL
@@ -438,9 +429,6 @@ static int rtc_dev_release(struct inode *inode, struct file *file)
rtc_update_irq_enable(rtc, 0);
rtc_irq_set_state(rtc, NULL, 0);
- if (rtc->ops->release)
- rtc->ops->release(rtc->dev.parent);
-
clear_bit_unlock(RTC_DEV_BUSY, &rtc->flags);
return 0;
}
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index 4b43aa62fbc7..e7d9215c9201 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -39,6 +39,7 @@ enum ds_type {
ds_1338,
ds_1339,
ds_1340,
+ ds_1341,
ds_1388,
ds_3231,
m41t0,
@@ -50,7 +51,6 @@ enum ds_type {
/* rs5c372 too? different address... */
};
-
/* RTC registers don't differ much, except for the century flag */
#define DS1307_REG_SECS 0x00 /* 00-59 */
# define DS1307_BIT_CH 0x80
@@ -113,11 +113,7 @@ enum ds_type {
# define RX8025_BIT_VDET 0x40
# define RX8025_BIT_XST 0x20
-
struct ds1307 {
- u8 offset; /* register's offset */
- u8 regs[11];
- u16 nvram_offset;
struct nvmem_config nvmem_cfg;
enum ds_type type;
unsigned long flags;
@@ -126,7 +122,6 @@ struct ds1307 {
struct device *dev;
struct regmap *regmap;
const char *name;
- int irq;
struct rtc_device *rtc;
#ifdef CONFIG_COMMON_CLK
struct clk_hw clks[2];
@@ -137,18 +132,47 @@ struct chip_desc {
unsigned alarm:1;
u16 nvram_offset;
u16 nvram_size;
+ u8 offset; /* register's offset */
u8 century_reg;
u8 century_enable_bit;
u8 century_bit;
+ u8 bbsqi_bit;
+ irq_handler_t irq_handler;
+ const struct rtc_class_ops *rtc_ops;
u16 trickle_charger_reg;
- u8 trickle_charger_setup;
- u8 (*do_trickle_setup)(struct ds1307 *, uint32_t,
+ u8 (*do_trickle_setup)(struct ds1307 *, u32,
bool);
};
-static u8 do_trickle_setup_ds1339(struct ds1307 *, uint32_t ohms, bool diode);
+static int ds1307_get_time(struct device *dev, struct rtc_time *t);
+static int ds1307_set_time(struct device *dev, struct rtc_time *t);
+static u8 do_trickle_setup_ds1339(struct ds1307 *, u32 ohms, bool diode);
+static irqreturn_t rx8130_irq(int irq, void *dev_id);
+static int rx8130_read_alarm(struct device *dev, struct rtc_wkalrm *t);
+static int rx8130_set_alarm(struct device *dev, struct rtc_wkalrm *t);
+static int rx8130_alarm_irq_enable(struct device *dev, unsigned int enabled);
+static irqreturn_t mcp794xx_irq(int irq, void *dev_id);
+static int mcp794xx_read_alarm(struct device *dev, struct rtc_wkalrm *t);
+static int mcp794xx_set_alarm(struct device *dev, struct rtc_wkalrm *t);
+static int mcp794xx_alarm_irq_enable(struct device *dev, unsigned int enabled);
-static struct chip_desc chips[last_ds_type] = {
+static const struct rtc_class_ops rx8130_rtc_ops = {
+ .read_time = ds1307_get_time,
+ .set_time = ds1307_set_time,
+ .read_alarm = rx8130_read_alarm,
+ .set_alarm = rx8130_set_alarm,
+ .alarm_irq_enable = rx8130_alarm_irq_enable,
+};
+
+static const struct rtc_class_ops mcp794xx_rtc_ops = {
+ .read_time = ds1307_get_time,
+ .set_time = ds1307_set_time,
+ .read_alarm = mcp794xx_read_alarm,
+ .set_alarm = mcp794xx_set_alarm,
+ .alarm_irq_enable = mcp794xx_alarm_irq_enable,
+};
+
+static const struct chip_desc chips[last_ds_type] = {
[ds_1307] = {
.nvram_offset = 8,
.nvram_size = 56,
@@ -170,6 +194,7 @@ static struct chip_desc chips[last_ds_type] = {
.alarm = 1,
.century_reg = DS1307_REG_MONTH,
.century_bit = DS1337_BIT_CENTURY,
+ .bbsqi_bit = DS1339_BIT_BBSQI,
.trickle_charger_reg = 0x10,
.do_trickle_setup = &do_trickle_setup_ds1339,
},
@@ -179,25 +204,36 @@ static struct chip_desc chips[last_ds_type] = {
.century_bit = DS1340_BIT_CENTURY,
.trickle_charger_reg = 0x08,
},
+ [ds_1341] = {
+ .century_reg = DS1307_REG_MONTH,
+ .century_bit = DS1337_BIT_CENTURY,
+ },
[ds_1388] = {
+ .offset = 1,
.trickle_charger_reg = 0x0a,
},
[ds_3231] = {
.alarm = 1,
.century_reg = DS1307_REG_MONTH,
.century_bit = DS1337_BIT_CENTURY,
+ .bbsqi_bit = DS3231_BIT_BBSQW,
},
[rx_8130] = {
.alarm = 1,
/* this is battery backed SRAM */
.nvram_offset = 0x20,
.nvram_size = 4, /* 32bit (4 word x 8 bit) */
+ .offset = 0x10,
+ .irq_handler = rx8130_irq,
+ .rtc_ops = &rx8130_rtc_ops,
},
[mcp794xx] = {
.alarm = 1,
/* this is battery backed SRAM */
.nvram_offset = 0x20,
.nvram_size = 0x40,
+ .irq_handler = mcp794xx_irq,
+ .rtc_ops = &mcp794xx_rtc_ops,
},
};
@@ -209,6 +245,7 @@ static const struct i2c_device_id ds1307_id[] = {
{ "ds1339", ds_1339 },
{ "ds1388", ds_1388 },
{ "ds1340", ds_1340 },
+ { "ds1341", ds_1341 },
{ "ds3231", ds_3231 },
{ "m41t0", m41t0 },
{ "m41t00", m41t00 },
@@ -253,6 +290,10 @@ static const struct of_device_id ds1307_of_match[] = {
.data = (void *)ds_1340
},
{
+ .compatible = "dallas,ds1341",
+ .data = (void *)ds_1341
+ },
+ {
.compatible = "maxim,ds3231",
.data = (void *)ds_3231
},
@@ -298,6 +339,7 @@ static const struct acpi_device_id ds1307_acpi_ids[] = {
{ .id = "DS1339", .driver_data = ds_1339 },
{ .id = "DS1388", .driver_data = ds_1388 },
{ .id = "DS1340", .driver_data = ds_1340 },
+ { .id = "DS1341", .driver_data = ds_1341 },
{ .id = "DS3231", .driver_data = ds_3231 },
{ .id = "M41T0", .driver_data = m41t0 },
{ .id = "M41T00", .driver_data = m41t00 },
@@ -352,34 +394,36 @@ static int ds1307_get_time(struct device *dev, struct rtc_time *t)
struct ds1307 *ds1307 = dev_get_drvdata(dev);
int tmp, ret;
const struct chip_desc *chip = &chips[ds1307->type];
+ u8 regs[7];
/* read the RTC date and time registers all at once */
- ret = regmap_bulk_read(ds1307->regmap, ds1307->offset, ds1307->regs, 7);
+ ret = regmap_bulk_read(ds1307->regmap, chip->offset, regs,
+ sizeof(regs));
if (ret) {
dev_err(dev, "%s error %d\n", "read", ret);
return ret;
}
- dev_dbg(dev, "%s: %7ph\n", "read", ds1307->regs);
+ dev_dbg(dev, "%s: %7ph\n", "read", regs);
/* if oscillator fail bit is set, no data can be trusted */
if (ds1307->type == m41t0 &&
- ds1307->regs[DS1307_REG_MIN] & M41T0_BIT_OF) {
+ regs[DS1307_REG_MIN] & M41T0_BIT_OF) {
dev_warn_once(dev, "oscillator failed, set time!\n");
return -EINVAL;
}
- t->tm_sec = bcd2bin(ds1307->regs[DS1307_REG_SECS] & 0x7f);
- t->tm_min = bcd2bin(ds1307->regs[DS1307_REG_MIN] & 0x7f);
- tmp = ds1307->regs[DS1307_REG_HOUR] & 0x3f;
+ t->tm_sec = bcd2bin(regs[DS1307_REG_SECS] & 0x7f);
+ t->tm_min = bcd2bin(regs[DS1307_REG_MIN] & 0x7f);
+ tmp = regs[DS1307_REG_HOUR] & 0x3f;
t->tm_hour = bcd2bin(tmp);
- t->tm_wday = bcd2bin(ds1307->regs[DS1307_REG_WDAY] & 0x07) - 1;
- t->tm_mday = bcd2bin(ds1307->regs[DS1307_REG_MDAY] & 0x3f);
- tmp = ds1307->regs[DS1307_REG_MONTH] & 0x1f;
+ t->tm_wday = bcd2bin(regs[DS1307_REG_WDAY] & 0x07) - 1;
+ t->tm_mday = bcd2bin(regs[DS1307_REG_MDAY] & 0x3f);
+ tmp = regs[DS1307_REG_MONTH] & 0x1f;
t->tm_mon = bcd2bin(tmp) - 1;
- t->tm_year = bcd2bin(ds1307->regs[DS1307_REG_YEAR]) + 100;
+ t->tm_year = bcd2bin(regs[DS1307_REG_YEAR]) + 100;
- if (ds1307->regs[chip->century_reg] & chip->century_bit &&
+ if (regs[chip->century_reg] & chip->century_bit &&
IS_ENABLED(CONFIG_RTC_DRV_DS1307_CENTURY))
t->tm_year += 100;
@@ -399,7 +443,7 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t)
const struct chip_desc *chip = &chips[ds1307->type];
int result;
int tmp;
- u8 *buf = ds1307->regs;
+ u8 regs[7];
dev_dbg(dev, "%s secs=%d, mins=%d, "
"hours=%d, mday=%d, mon=%d, year=%d, wday=%d\n",
@@ -418,35 +462,36 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t)
return -EINVAL;
#endif
- buf[DS1307_REG_SECS] = bin2bcd(t->tm_sec);
- buf[DS1307_REG_MIN] = bin2bcd(t->tm_min);
- buf[DS1307_REG_HOUR] = bin2bcd(t->tm_hour);
- buf[DS1307_REG_WDAY] = bin2bcd(t->tm_wday + 1);
- buf[DS1307_REG_MDAY] = bin2bcd(t->tm_mday);
- buf[DS1307_REG_MONTH] = bin2bcd(t->tm_mon + 1);
+ regs[DS1307_REG_SECS] = bin2bcd(t->tm_sec);
+ regs[DS1307_REG_MIN] = bin2bcd(t->tm_min);
+ regs[DS1307_REG_HOUR] = bin2bcd(t->tm_hour);
+ regs[DS1307_REG_WDAY] = bin2bcd(t->tm_wday + 1);
+ regs[DS1307_REG_MDAY] = bin2bcd(t->tm_mday);
+ regs[DS1307_REG_MONTH] = bin2bcd(t->tm_mon + 1);
/* assume 20YY not 19YY */
tmp = t->tm_year - 100;
- buf[DS1307_REG_YEAR] = bin2bcd(tmp);
+ regs[DS1307_REG_YEAR] = bin2bcd(tmp);
if (chip->century_enable_bit)
- buf[chip->century_reg] |= chip->century_enable_bit;
+ regs[chip->century_reg] |= chip->century_enable_bit;
if (t->tm_year > 199 && chip->century_bit)
- buf[chip->century_reg] |= chip->century_bit;
+ regs[chip->century_reg] |= chip->century_bit;
if (ds1307->type == mcp794xx) {
/*
* these bits were cleared when preparing the date/time
* values and need to be set again before writing the
- * buffer out to the device.
+ * regsfer out to the device.
*/
- buf[DS1307_REG_SECS] |= MCP794XX_BIT_ST;
- buf[DS1307_REG_WDAY] |= MCP794XX_BIT_VBATEN;
+ regs[DS1307_REG_SECS] |= MCP794XX_BIT_ST;
+ regs[DS1307_REG_WDAY] |= MCP794XX_BIT_VBATEN;
}
- dev_dbg(dev, "%s: %7ph\n", "write", buf);
+ dev_dbg(dev, "%s: %7ph\n", "write", regs);
- result = regmap_bulk_write(ds1307->regmap, ds1307->offset, buf, 7);
+ result = regmap_bulk_write(ds1307->regmap, chip->offset, regs,
+ sizeof(regs));
if (result) {
dev_err(dev, "%s error %d\n", "write", result);
return result;
@@ -458,33 +503,34 @@ static int ds1337_read_alarm(struct device *dev, struct rtc_wkalrm *t)
{
struct ds1307 *ds1307 = dev_get_drvdata(dev);
int ret;
+ u8 regs[9];
if (!test_bit(HAS_ALARM, &ds1307->flags))
return -EINVAL;
/* read all ALARM1, ALARM2, and status registers at once */
ret = regmap_bulk_read(ds1307->regmap, DS1339_REG_ALARM1_SECS,
- ds1307->regs, 9);
+ regs, sizeof(regs));
if (ret) {
dev_err(dev, "%s error %d\n", "alarm read", ret);
return ret;
}
dev_dbg(dev, "%s: %4ph, %3ph, %2ph\n", "alarm read",
- &ds1307->regs[0], &ds1307->regs[4], &ds1307->regs[7]);
+ &regs[0], &regs[4], &regs[7]);
/*
* report alarm time (ALARM1); assume 24 hour and day-of-month modes,
* and that all four fields are checked matches
*/
- t->time.tm_sec = bcd2bin(ds1307->regs[0] & 0x7f);
- t->time.tm_min = bcd2bin(ds1307->regs[1] & 0x7f);
- t->time.tm_hour = bcd2bin(ds1307->regs[2] & 0x3f);
- t->time.tm_mday = bcd2bin(ds1307->regs[3] & 0x3f);
+ t->time.tm_sec = bcd2bin(regs[0] & 0x7f);
+ t->time.tm_min = bcd2bin(regs[1] & 0x7f);
+ t->time.tm_hour = bcd2bin(regs[2] & 0x3f);
+ t->time.tm_mday = bcd2bin(regs[3] & 0x3f);
/* ... and status */
- t->enabled = !!(ds1307->regs[7] & DS1337_BIT_A1IE);
- t->pending = !!(ds1307->regs[8] & DS1337_BIT_A1I);
+ t->enabled = !!(regs[7] & DS1337_BIT_A1IE);
+ t->pending = !!(regs[8] & DS1337_BIT_A1I);
dev_dbg(dev, "%s secs=%d, mins=%d, "
"hours=%d, mday=%d, enabled=%d, pending=%d\n",
@@ -498,7 +544,7 @@ static int ds1337_read_alarm(struct device *dev, struct rtc_wkalrm *t)
static int ds1337_set_alarm(struct device *dev, struct rtc_wkalrm *t)
{
struct ds1307 *ds1307 = dev_get_drvdata(dev);
- unsigned char *buf = ds1307->regs;
+ unsigned char regs[9];
u8 control, status;
int ret;
@@ -512,33 +558,35 @@ static int ds1337_set_alarm(struct device *dev, struct rtc_wkalrm *t)
t->enabled, t->pending);
/* read current status of both alarms and the chip */
- ret = regmap_bulk_read(ds1307->regmap, DS1339_REG_ALARM1_SECS, buf, 9);
+ ret = regmap_bulk_read(ds1307->regmap, DS1339_REG_ALARM1_SECS, regs,
+ sizeof(regs));
if (ret) {
dev_err(dev, "%s error %d\n", "alarm write", ret);
return ret;
}
- control = ds1307->regs[7];
- status = ds1307->regs[8];
+ control = regs[7];
+ status = regs[8];
dev_dbg(dev, "%s: %4ph, %3ph, %02x %02x\n", "alarm set (old status)",
- &ds1307->regs[0], &ds1307->regs[4], control, status);
+ &regs[0], &regs[4], control, status);
/* set ALARM1, using 24 hour and day-of-month modes */
- buf[0] = bin2bcd(t->time.tm_sec);
- buf[1] = bin2bcd(t->time.tm_min);
- buf[2] = bin2bcd(t->time.tm_hour);
- buf[3] = bin2bcd(t->time.tm_mday);
+ regs[0] = bin2bcd(t->time.tm_sec);
+ regs[1] = bin2bcd(t->time.tm_min);
+ regs[2] = bin2bcd(t->time.tm_hour);
+ regs[3] = bin2bcd(t->time.tm_mday);
/* set ALARM2 to non-garbage */
- buf[4] = 0;
- buf[5] = 0;
- buf[6] = 0;
+ regs[4] = 0;
+ regs[5] = 0;
+ regs[6] = 0;
/* disable alarms */
- buf[7] = control & ~(DS1337_BIT_A1IE | DS1337_BIT_A2IE);
- buf[8] = status & ~(DS1337_BIT_A1I | DS1337_BIT_A2I);
+ regs[7] = control & ~(DS1337_BIT_A1IE | DS1337_BIT_A2IE);
+ regs[8] = status & ~(DS1337_BIT_A1I | DS1337_BIT_A2I);
- ret = regmap_bulk_write(ds1307->regmap, DS1339_REG_ALARM1_SECS, buf, 9);
+ ret = regmap_bulk_write(ds1307->regmap, DS1339_REG_ALARM1_SECS, regs,
+ sizeof(regs));
if (ret) {
dev_err(dev, "can't set alarm time\n");
return ret;
@@ -547,8 +595,8 @@ static int ds1337_set_alarm(struct device *dev, struct rtc_wkalrm *t)
/* optionally enable ALARM1 */
if (t->enabled) {
dev_dbg(dev, "alarm IRQ armed\n");
- buf[7] |= DS1337_BIT_A1IE; /* only ALARM1 is used */
- regmap_write(ds1307->regmap, DS1337_REG_CONTROL, buf[7]);
+ regs[7] |= DS1337_BIT_A1IE; /* only ALARM1 is used */
+ regmap_write(ds1307->regmap, DS1337_REG_CONTROL, regs[7]);
}
return 0;
@@ -584,11 +632,11 @@ static const struct rtc_class_ops ds13xx_rtc_ops = {
#define RX8130_REG_ALARM_HOUR 0x08
#define RX8130_REG_ALARM_WEEK_OR_DAY 0x09
#define RX8130_REG_EXTENSION 0x0c
-#define RX8130_REG_EXTENSION_WADA (1 << 3)
+#define RX8130_REG_EXTENSION_WADA BIT(3)
#define RX8130_REG_FLAG 0x0d
-#define RX8130_REG_FLAG_AF (1 << 3)
+#define RX8130_REG_FLAG_AF BIT(3)
#define RX8130_REG_CONTROL0 0x0e
-#define RX8130_REG_CONTROL0_AIE (1 << 3)
+#define RX8130_REG_CONTROL0_AIE BIT(3)
static irqreturn_t rx8130_irq(int irq, void *dev_id)
{
@@ -600,7 +648,8 @@ static irqreturn_t rx8130_irq(int irq, void *dev_id)
mutex_lock(lock);
/* Read control registers. */
- ret = regmap_bulk_read(ds1307->regmap, RX8130_REG_EXTENSION, ctl, 3);
+ ret = regmap_bulk_read(ds1307->regmap, RX8130_REG_EXTENSION, ctl,
+ sizeof(ctl));
if (ret < 0)
goto out;
if (!(ctl[1] & RX8130_REG_FLAG_AF))
@@ -608,7 +657,8 @@ static irqreturn_t rx8130_irq(int irq, void *dev_id)
ctl[1] &= ~RX8130_REG_FLAG_AF;
ctl[2] &= ~RX8130_REG_CONTROL0_AIE;
- ret = regmap_bulk_write(ds1307->regmap, RX8130_REG_EXTENSION, ctl, 3);
+ ret = regmap_bulk_write(ds1307->regmap, RX8130_REG_EXTENSION, ctl,
+ sizeof(ctl));
if (ret < 0)
goto out;
@@ -630,12 +680,14 @@ static int rx8130_read_alarm(struct device *dev, struct rtc_wkalrm *t)
return -EINVAL;
/* Read alarm registers. */
- ret = regmap_bulk_read(ds1307->regmap, RX8130_REG_ALARM_MIN, ald, 3);
+ ret = regmap_bulk_read(ds1307->regmap, RX8130_REG_ALARM_MIN, ald,
+ sizeof(ald));
if (ret < 0)
return ret;
/* Read control registers. */
- ret = regmap_bulk_read(ds1307->regmap, RX8130_REG_EXTENSION, ctl, 3);
+ ret = regmap_bulk_read(ds1307->regmap, RX8130_REG_EXTENSION, ctl,
+ sizeof(ctl));
if (ret < 0)
return ret;
@@ -676,7 +728,8 @@ static int rx8130_set_alarm(struct device *dev, struct rtc_wkalrm *t)
t->enabled, t->pending);
/* Read control registers. */
- ret = regmap_bulk_read(ds1307->regmap, RX8130_REG_EXTENSION, ctl, 3);
+ ret = regmap_bulk_read(ds1307->regmap, RX8130_REG_EXTENSION, ctl,
+ sizeof(ctl));
if (ret < 0)
return ret;
@@ -684,7 +737,8 @@ static int rx8130_set_alarm(struct device *dev, struct rtc_wkalrm *t)
ctl[1] |= RX8130_REG_FLAG_AF;
ctl[2] &= ~RX8130_REG_CONTROL0_AIE;
- ret = regmap_bulk_write(ds1307->regmap, RX8130_REG_EXTENSION, ctl, 3);
+ ret = regmap_bulk_write(ds1307->regmap, RX8130_REG_EXTENSION, ctl,
+ sizeof(ctl));
if (ret < 0)
return ret;
@@ -693,7 +747,8 @@ static int rx8130_set_alarm(struct device *dev, struct rtc_wkalrm *t)
ald[1] = bin2bcd(t->time.tm_hour);
ald[2] = bin2bcd(t->time.tm_mday);
- ret = regmap_bulk_write(ds1307->regmap, RX8130_REG_ALARM_MIN, ald, 3);
+ ret = regmap_bulk_write(ds1307->regmap, RX8130_REG_ALARM_MIN, ald,
+ sizeof(ald));
if (ret < 0)
return ret;
@@ -702,7 +757,8 @@ static int rx8130_set_alarm(struct device *dev, struct rtc_wkalrm *t)
ctl[2] |= RX8130_REG_CONTROL0_AIE;
- return regmap_bulk_write(ds1307->regmap, RX8130_REG_EXTENSION, ctl, 3);
+ return regmap_bulk_write(ds1307->regmap, RX8130_REG_EXTENSION, ctl,
+ sizeof(ctl));
}
static int rx8130_alarm_irq_enable(struct device *dev, unsigned int enabled)
@@ -725,14 +781,6 @@ static int rx8130_alarm_irq_enable(struct device *dev, unsigned int enabled)
return regmap_write(ds1307->regmap, RX8130_REG_CONTROL0, reg);
}
-static const struct rtc_class_ops rx8130_rtc_ops = {
- .read_time = ds1307_get_time,
- .set_time = ds1307_set_time,
- .read_alarm = rx8130_read_alarm,
- .set_alarm = rx8130_set_alarm,
- .alarm_irq_enable = rx8130_alarm_irq_enable,
-};
-
/*----------------------------------------------------------------------*/
/*
@@ -748,11 +796,11 @@ static const struct rtc_class_ops rx8130_rtc_ops = {
#define MCP794XX_REG_ALARM0_CTRL 0x0d
#define MCP794XX_REG_ALARM1_BASE 0x11
#define MCP794XX_REG_ALARM1_CTRL 0x14
-# define MCP794XX_BIT_ALMX_IF (1 << 3)
-# define MCP794XX_BIT_ALMX_C0 (1 << 4)
-# define MCP794XX_BIT_ALMX_C1 (1 << 5)
-# define MCP794XX_BIT_ALMX_C2 (1 << 6)
-# define MCP794XX_BIT_ALMX_POL (1 << 7)
+# define MCP794XX_BIT_ALMX_IF BIT(3)
+# define MCP794XX_BIT_ALMX_C0 BIT(4)
+# define MCP794XX_BIT_ALMX_C1 BIT(5)
+# define MCP794XX_BIT_ALMX_C2 BIT(6)
+# define MCP794XX_BIT_ALMX_POL BIT(7)
# define MCP794XX_MSK_ALMX_MATCH (MCP794XX_BIT_ALMX_C0 | \
MCP794XX_BIT_ALMX_C1 | \
MCP794XX_BIT_ALMX_C2)
@@ -793,37 +841,38 @@ out:
static int mcp794xx_read_alarm(struct device *dev, struct rtc_wkalrm *t)
{
struct ds1307 *ds1307 = dev_get_drvdata(dev);
- u8 *regs = ds1307->regs;
+ u8 regs[10];
int ret;
if (!test_bit(HAS_ALARM, &ds1307->flags))
return -EINVAL;
/* Read control and alarm 0 registers. */
- ret = regmap_bulk_read(ds1307->regmap, MCP794XX_REG_CONTROL, regs, 10);
+ ret = regmap_bulk_read(ds1307->regmap, MCP794XX_REG_CONTROL, regs,
+ sizeof(regs));
if (ret)
return ret;
t->enabled = !!(regs[0] & MCP794XX_BIT_ALM0_EN);
/* Report alarm 0 time assuming 24-hour and day-of-month modes. */
- t->time.tm_sec = bcd2bin(ds1307->regs[3] & 0x7f);
- t->time.tm_min = bcd2bin(ds1307->regs[4] & 0x7f);
- t->time.tm_hour = bcd2bin(ds1307->regs[5] & 0x3f);
- t->time.tm_wday = bcd2bin(ds1307->regs[6] & 0x7) - 1;
- t->time.tm_mday = bcd2bin(ds1307->regs[7] & 0x3f);
- t->time.tm_mon = bcd2bin(ds1307->regs[8] & 0x1f) - 1;
+ t->time.tm_sec = bcd2bin(regs[3] & 0x7f);
+ t->time.tm_min = bcd2bin(regs[4] & 0x7f);
+ t->time.tm_hour = bcd2bin(regs[5] & 0x3f);
+ t->time.tm_wday = bcd2bin(regs[6] & 0x7) - 1;
+ t->time.tm_mday = bcd2bin(regs[7] & 0x3f);
+ t->time.tm_mon = bcd2bin(regs[8] & 0x1f) - 1;
t->time.tm_year = -1;
t->time.tm_yday = -1;
t->time.tm_isdst = -1;
dev_dbg(dev, "%s, sec=%d min=%d hour=%d wday=%d mday=%d mon=%d "
- "enabled=%d polarity=%d irq=%d match=%d\n", __func__,
+ "enabled=%d polarity=%d irq=%d match=%lu\n", __func__,
t->time.tm_sec, t->time.tm_min, t->time.tm_hour,
t->time.tm_wday, t->time.tm_mday, t->time.tm_mon, t->enabled,
- !!(ds1307->regs[6] & MCP794XX_BIT_ALMX_POL),
- !!(ds1307->regs[6] & MCP794XX_BIT_ALMX_IF),
- (ds1307->regs[6] & MCP794XX_MSK_ALMX_MATCH) >> 4);
+ !!(regs[6] & MCP794XX_BIT_ALMX_POL),
+ !!(regs[6] & MCP794XX_BIT_ALMX_IF),
+ (regs[6] & MCP794XX_MSK_ALMX_MATCH) >> 4);
return 0;
}
@@ -831,7 +880,7 @@ static int mcp794xx_read_alarm(struct device *dev, struct rtc_wkalrm *t)
static int mcp794xx_set_alarm(struct device *dev, struct rtc_wkalrm *t)
{
struct ds1307 *ds1307 = dev_get_drvdata(dev);
- unsigned char *regs = ds1307->regs;
+ unsigned char regs[10];
int ret;
if (!test_bit(HAS_ALARM, &ds1307->flags))
@@ -844,7 +893,8 @@ static int mcp794xx_set_alarm(struct device *dev, struct rtc_wkalrm *t)
t->enabled, t->pending);
/* Read control and alarm 0 registers. */
- ret = regmap_bulk_read(ds1307->regmap, MCP794XX_REG_CONTROL, regs, 10);
+ ret = regmap_bulk_read(ds1307->regmap, MCP794XX_REG_CONTROL, regs,
+ sizeof(regs));
if (ret)
return ret;
@@ -863,7 +913,8 @@ static int mcp794xx_set_alarm(struct device *dev, struct rtc_wkalrm *t)
/* Disable interrupt. We will not enable until completely programmed */
regs[0] &= ~MCP794XX_BIT_ALM0_EN;
- ret = regmap_bulk_write(ds1307->regmap, MCP794XX_REG_CONTROL, regs, 10);
+ ret = regmap_bulk_write(ds1307->regmap, MCP794XX_REG_CONTROL, regs,
+ sizeof(regs));
if (ret)
return ret;
@@ -885,22 +936,15 @@ static int mcp794xx_alarm_irq_enable(struct device *dev, unsigned int enabled)
enabled ? MCP794XX_BIT_ALM0_EN : 0);
}
-static const struct rtc_class_ops mcp794xx_rtc_ops = {
- .read_time = ds1307_get_time,
- .set_time = ds1307_set_time,
- .read_alarm = mcp794xx_read_alarm,
- .set_alarm = mcp794xx_set_alarm,
- .alarm_irq_enable = mcp794xx_alarm_irq_enable,
-};
-
/*----------------------------------------------------------------------*/
static int ds1307_nvram_read(void *priv, unsigned int offset, void *val,
size_t bytes)
{
struct ds1307 *ds1307 = priv;
+ const struct chip_desc *chip = &chips[ds1307->type];
- return regmap_bulk_read(ds1307->regmap, ds1307->nvram_offset + offset,
+ return regmap_bulk_read(ds1307->regmap, chip->nvram_offset + offset,
val, bytes);
}
@@ -908,15 +952,16 @@ static int ds1307_nvram_write(void *priv, unsigned int offset, void *val,
size_t bytes)
{
struct ds1307 *ds1307 = priv;
+ const struct chip_desc *chip = &chips[ds1307->type];
- return regmap_bulk_write(ds1307->regmap, ds1307->nvram_offset + offset,
+ return regmap_bulk_write(ds1307->regmap, chip->nvram_offset + offset,
val, bytes);
}
/*----------------------------------------------------------------------*/
static u8 do_trickle_setup_ds1339(struct ds1307 *ds1307,
- uint32_t ohms, bool diode)
+ u32 ohms, bool diode)
{
u8 setup = (diode) ? DS1307_TRICKLE_CHARGER_DIODE :
DS1307_TRICKLE_CHARGER_NO_DIODE;
@@ -939,23 +984,23 @@ static u8 do_trickle_setup_ds1339(struct ds1307 *ds1307,
return setup;
}
-static void ds1307_trickle_init(struct ds1307 *ds1307,
- struct chip_desc *chip)
+static u8 ds1307_trickle_init(struct ds1307 *ds1307,
+ const struct chip_desc *chip)
{
- uint32_t ohms = 0;
+ u32 ohms;
bool diode = true;
if (!chip->do_trickle_setup)
- goto out;
+ return 0;
+
if (device_property_read_u32(ds1307->dev, "trickle-resistor-ohms",
&ohms))
- goto out;
+ return 0;
+
if (device_property_read_bool(ds1307->dev, "trickle-diode-disable"))
diode = false;
- chip->trickle_charger_setup = chip->do_trickle_setup(ds1307,
- ohms, diode);
-out:
- return;
+
+ return chip->do_trickle_setup(ds1307, ohms, diode);
}
/*----------------------------------------------------------------------*/
@@ -995,7 +1040,7 @@ static int ds3231_hwmon_read_temp(struct device *dev, s32 *mC)
}
static ssize_t ds3231_hwmon_show_temp(struct device *dev,
- struct device_attribute *attr, char *buf)
+ struct device_attribute *attr, char *buf)
{
int ret;
s32 temp;
@@ -1006,8 +1051,8 @@ static ssize_t ds3231_hwmon_show_temp(struct device *dev,
return sprintf(buf, "%d\n", temp);
}
-static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, ds3231_hwmon_show_temp,
- NULL, 0);
+static SENSOR_DEVICE_ATTR(temp1_input, 0444, ds3231_hwmon_show_temp,
+ NULL, 0);
static struct attribute *ds3231_hwmon_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
@@ -1023,7 +1068,8 @@ static void ds1307_hwmon_register(struct ds1307 *ds1307)
return;
dev = devm_hwmon_device_register_with_groups(ds1307->dev, ds1307->name,
- ds1307, ds3231_hwmon_groups);
+ ds1307,
+ ds3231_hwmon_groups);
if (IS_ERR(dev)) {
dev_warn(ds1307->dev, "unable to register hwmon device %ld\n",
PTR_ERR(dev));
@@ -1095,7 +1141,7 @@ static unsigned long ds3231_clk_sqw_recalc_rate(struct clk_hw *hw,
}
static long ds3231_clk_sqw_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+ unsigned long *prate)
{
int i;
@@ -1108,7 +1154,7 @@ static long ds3231_clk_sqw_round_rate(struct clk_hw *hw, unsigned long rate,
}
static int ds3231_clk_sqw_set_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long parent_rate)
+ unsigned long parent_rate)
{
struct ds1307 *ds1307 = clk_sqw_to_ds1307(hw);
int control = 0;
@@ -1168,7 +1214,7 @@ static const struct clk_ops ds3231_clk_sqw_ops = {
};
static unsigned long ds3231_clk_32khz_recalc_rate(struct clk_hw *hw,
- unsigned long parent_rate)
+ unsigned long parent_rate)
{
return 32768;
}
@@ -1259,7 +1305,7 @@ static int ds3231_clks_register(struct ds1307 *ds1307)
/* optional override of the clockname */
of_property_read_string_index(node, "clock-output-names", i,
- &init.name);
+ &init.name);
ds1307->clks[i].init = &init;
onecell->clks[i] = devm_clk_register(ds1307->dev,
@@ -1309,22 +1355,14 @@ static int ds1307_probe(struct i2c_client *client,
struct ds1307 *ds1307;
int err = -ENODEV;
int tmp, wday;
- struct chip_desc *chip;
- bool want_irq = false;
+ const struct chip_desc *chip;
+ bool want_irq;
bool ds1307_can_wakeup_device = false;
- unsigned char *buf;
+ unsigned char regs[8];
struct ds1307_platform_data *pdata = dev_get_platdata(&client->dev);
struct rtc_time tm;
unsigned long timestamp;
-
- irq_handler_t irq_handler = ds1307_irq;
-
- static const int bbsqi_bitpos[] = {
- [ds_1337] = 0,
- [ds_1339] = DS1339_BIT_BBSQI,
- [ds_3231] = DS3231_BIT_BBSQW,
- };
- const struct rtc_class_ops *rtc_ops = &ds13xx_rtc_ops;
+ u8 trickle_charger_setup = 0;
ds1307 = devm_kzalloc(&client->dev, sizeof(struct ds1307), GFP_KERNEL);
if (!ds1307)
@@ -1333,7 +1371,6 @@ static int ds1307_probe(struct i2c_client *client,
dev_set_drvdata(&client->dev, ds1307);
ds1307->dev = &client->dev;
ds1307->name = client->name;
- ds1307->irq = client->irq;
ds1307->regmap = devm_regmap_init_i2c(client, &regmap_config);
if (IS_ERR(ds1307->regmap)) {
@@ -1361,23 +1398,22 @@ static int ds1307_probe(struct i2c_client *client,
ds1307->type = acpi_id->driver_data;
}
+ want_irq = client->irq > 0 && chip->alarm;
+
if (!pdata)
- ds1307_trickle_init(ds1307, chip);
+ trickle_charger_setup = ds1307_trickle_init(ds1307, chip);
else if (pdata->trickle_charger_setup)
- chip->trickle_charger_setup = pdata->trickle_charger_setup;
+ trickle_charger_setup = pdata->trickle_charger_setup;
- if (chip->trickle_charger_setup && chip->trickle_charger_reg) {
+ if (trickle_charger_setup && chip->trickle_charger_reg) {
+ trickle_charger_setup |= DS13XX_TRICKLE_CHARGER_MAGIC;
dev_dbg(ds1307->dev,
"writing trickle charger info 0x%x to 0x%x\n",
- DS13XX_TRICKLE_CHARGER_MAGIC | chip->trickle_charger_setup,
- chip->trickle_charger_reg);
+ trickle_charger_setup, chip->trickle_charger_reg);
regmap_write(ds1307->regmap, chip->trickle_charger_reg,
- DS13XX_TRICKLE_CHARGER_MAGIC |
- chip->trickle_charger_setup);
+ trickle_charger_setup);
}
- buf = ds1307->regs;
-
#ifdef CONFIG_OF
/*
* For devices with no IRQ directly connected to the SoC, the RTC chip
@@ -1387,31 +1423,27 @@ static int ds1307_probe(struct i2c_client *client,
* This will guarantee the 'wakealarm' sysfs entry is available on the device,
* if supported by the RTC.
*/
- if (of_property_read_bool(client->dev.of_node, "wakeup-source")) {
- ds1307_can_wakeup_device = true;
- }
- /* Intersil ISL12057 DT backward compatibility */
- if (of_property_read_bool(client->dev.of_node,
- "isil,irq2-can-wakeup-machine")) {
+ if (chip->alarm && of_property_read_bool(client->dev.of_node,
+ "wakeup-source"))
ds1307_can_wakeup_device = true;
- }
#endif
switch (ds1307->type) {
case ds_1337:
case ds_1339:
+ case ds_1341:
case ds_3231:
/* get registers that the "rtc" read below won't read... */
err = regmap_bulk_read(ds1307->regmap, DS1337_REG_CONTROL,
- buf, 2);
+ regs, 2);
if (err) {
dev_dbg(ds1307->dev, "read error %d\n", err);
goto exit;
}
/* oscillator off? turn it on, so clock can tick. */
- if (ds1307->regs[0] & DS1337_BIT_nEOSC)
- ds1307->regs[0] &= ~DS1337_BIT_nEOSC;
+ if (regs[0] & DS1337_BIT_nEOSC)
+ regs[0] &= ~DS1337_BIT_nEOSC;
/*
* Using IRQ or defined as wakeup-source?
@@ -1419,114 +1451,92 @@ static int ds1307_probe(struct i2c_client *client,
* For some variants, be sure alarms can trigger when we're
* running on Vbackup (BBSQI/BBSQW)
*/
- if (chip->alarm && (ds1307->irq > 0 ||
- ds1307_can_wakeup_device)) {
- ds1307->regs[0] |= DS1337_BIT_INTCN
- | bbsqi_bitpos[ds1307->type];
- ds1307->regs[0] &= ~(DS1337_BIT_A2IE | DS1337_BIT_A1IE);
-
- want_irq = true;
+ if (want_irq || ds1307_can_wakeup_device) {
+ regs[0] |= DS1337_BIT_INTCN | chip->bbsqi_bit;
+ regs[0] &= ~(DS1337_BIT_A2IE | DS1337_BIT_A1IE);
}
regmap_write(ds1307->regmap, DS1337_REG_CONTROL,
- ds1307->regs[0]);
+ regs[0]);
/* oscillator fault? clear flag, and warn */
- if (ds1307->regs[1] & DS1337_BIT_OSF) {
+ if (regs[1] & DS1337_BIT_OSF) {
regmap_write(ds1307->regmap, DS1337_REG_STATUS,
- ds1307->regs[1] & ~DS1337_BIT_OSF);
+ regs[1] & ~DS1337_BIT_OSF);
dev_warn(ds1307->dev, "SET TIME!\n");
}
break;
case rx_8025:
err = regmap_bulk_read(ds1307->regmap,
- RX8025_REG_CTRL1 << 4 | 0x08, buf, 2);
+ RX8025_REG_CTRL1 << 4 | 0x08, regs, 2);
if (err) {
dev_dbg(ds1307->dev, "read error %d\n", err);
goto exit;
}
/* oscillator off? turn it on, so clock can tick. */
- if (!(ds1307->regs[1] & RX8025_BIT_XST)) {
- ds1307->regs[1] |= RX8025_BIT_XST;
+ if (!(regs[1] & RX8025_BIT_XST)) {
+ regs[1] |= RX8025_BIT_XST;
regmap_write(ds1307->regmap,
RX8025_REG_CTRL2 << 4 | 0x08,
- ds1307->regs[1]);
+ regs[1]);
dev_warn(ds1307->dev,
"oscillator stop detected - SET TIME!\n");
}
- if (ds1307->regs[1] & RX8025_BIT_PON) {
- ds1307->regs[1] &= ~RX8025_BIT_PON;
+ if (regs[1] & RX8025_BIT_PON) {
+ regs[1] &= ~RX8025_BIT_PON;
regmap_write(ds1307->regmap,
RX8025_REG_CTRL2 << 4 | 0x08,
- ds1307->regs[1]);
+ regs[1]);
dev_warn(ds1307->dev, "power-on detected\n");
}
- if (ds1307->regs[1] & RX8025_BIT_VDET) {
- ds1307->regs[1] &= ~RX8025_BIT_VDET;
+ if (regs[1] & RX8025_BIT_VDET) {
+ regs[1] &= ~RX8025_BIT_VDET;
regmap_write(ds1307->regmap,
RX8025_REG_CTRL2 << 4 | 0x08,
- ds1307->regs[1]);
+ regs[1]);
dev_warn(ds1307->dev, "voltage drop detected\n");
}
/* make sure we are running in 24hour mode */
- if (!(ds1307->regs[0] & RX8025_BIT_2412)) {
+ if (!(regs[0] & RX8025_BIT_2412)) {
u8 hour;
/* switch to 24 hour mode */
regmap_write(ds1307->regmap,
RX8025_REG_CTRL1 << 4 | 0x08,
- ds1307->regs[0] | RX8025_BIT_2412);
+ regs[0] | RX8025_BIT_2412);
err = regmap_bulk_read(ds1307->regmap,
RX8025_REG_CTRL1 << 4 | 0x08,
- buf, 2);
+ regs, 2);
if (err) {
dev_dbg(ds1307->dev, "read error %d\n", err);
goto exit;
}
/* correct hour */
- hour = bcd2bin(ds1307->regs[DS1307_REG_HOUR]);
+ hour = bcd2bin(regs[DS1307_REG_HOUR]);
if (hour == 12)
hour = 0;
- if (ds1307->regs[DS1307_REG_HOUR] & DS1307_BIT_PM)
+ if (regs[DS1307_REG_HOUR] & DS1307_BIT_PM)
hour += 12;
regmap_write(ds1307->regmap,
DS1307_REG_HOUR << 4 | 0x08, hour);
}
break;
- case rx_8130:
- ds1307->offset = 0x10; /* Seconds starts at 0x10 */
- rtc_ops = &rx8130_rtc_ops;
- if (chip->alarm && ds1307->irq > 0) {
- irq_handler = rx8130_irq;
- want_irq = true;
- }
- break;
- case ds_1388:
- ds1307->offset = 1; /* Seconds starts at 1 */
- break;
- case mcp794xx:
- rtc_ops = &mcp794xx_rtc_ops;
- if (chip->alarm && (ds1307->irq > 0 ||
- ds1307_can_wakeup_device)) {
- irq_handler = mcp794xx_irq;
- want_irq = true;
- }
- break;
default:
break;
}
read_rtc:
/* read RTC registers */
- err = regmap_bulk_read(ds1307->regmap, ds1307->offset, buf, 8);
+ err = regmap_bulk_read(ds1307->regmap, chip->offset, regs,
+ sizeof(regs));
if (err) {
dev_dbg(ds1307->dev, "read error %d\n", err);
goto exit;
@@ -1537,7 +1547,7 @@ read_rtc:
* specify the extra bits as must-be-zero, but there are
* still a few values that are clearly out-of-range.
*/
- tmp = ds1307->regs[DS1307_REG_SECS];
+ tmp = regs[DS1307_REG_SECS];
switch (ds1307->type) {
case ds_1307:
case m41t0:
@@ -1556,10 +1566,10 @@ read_rtc:
regmap_write(ds1307->regmap, DS1307_REG_SECS, 0);
/* oscillator fault? clear flag, and warn */
- if (ds1307->regs[DS1307_REG_CONTROL] & DS1338_BIT_OSF) {
+ if (regs[DS1307_REG_CONTROL] & DS1338_BIT_OSF) {
regmap_write(ds1307->regmap, DS1307_REG_CONTROL,
- ds1307->regs[DS1307_REG_CONTROL] &
- ~DS1338_BIT_OSF);
+ regs[DS1307_REG_CONTROL] &
+ ~DS1338_BIT_OSF);
dev_warn(ds1307->dev, "SET TIME!\n");
goto read_rtc;
}
@@ -1583,9 +1593,9 @@ read_rtc:
break;
case mcp794xx:
/* make sure that the backup battery is enabled */
- if (!(ds1307->regs[DS1307_REG_WDAY] & MCP794XX_BIT_VBATEN)) {
+ if (!(regs[DS1307_REG_WDAY] & MCP794XX_BIT_VBATEN)) {
regmap_write(ds1307->regmap, DS1307_REG_WDAY,
- ds1307->regs[DS1307_REG_WDAY] |
+ regs[DS1307_REG_WDAY] |
MCP794XX_BIT_VBATEN);
}
@@ -1602,7 +1612,7 @@ read_rtc:
break;
}
- tmp = ds1307->regs[DS1307_REG_HOUR];
+ tmp = regs[DS1307_REG_HOUR];
switch (ds1307->type) {
case ds_1340:
case m41t0:
@@ -1625,9 +1635,9 @@ read_rtc:
tmp = bcd2bin(tmp & 0x1f);
if (tmp == 12)
tmp = 0;
- if (ds1307->regs[DS1307_REG_HOUR] & DS1307_BIT_PM)
+ if (regs[DS1307_REG_HOUR] & DS1307_BIT_PM)
tmp += 12;
- regmap_write(ds1307->regmap, ds1307->offset + DS1307_REG_HOUR,
+ regmap_write(ds1307->regmap, chip->offset + DS1307_REG_HOUR,
bin2bcd(tmp));
}
@@ -1650,19 +1660,16 @@ read_rtc:
MCP794XX_REG_WEEKDAY_WDAY_MASK,
tm.tm_wday + 1);
- if (want_irq) {
+ if (want_irq || ds1307_can_wakeup_device) {
device_set_wakeup_capable(ds1307->dev, true);
set_bit(HAS_ALARM, &ds1307->flags);
}
ds1307->rtc = devm_rtc_allocate_device(ds1307->dev);
- if (IS_ERR(ds1307->rtc)) {
+ if (IS_ERR(ds1307->rtc))
return PTR_ERR(ds1307->rtc);
- }
- if (ds1307_can_wakeup_device && ds1307->irq <= 0) {
- /* Disable request for an IRQ */
- want_irq = false;
+ if (ds1307_can_wakeup_device && !want_irq) {
dev_info(ds1307->dev,
"'wakeup-source' is set, request for an IRQ is disabled!\n");
/* We cannot support UIE mode if we do not have an IRQ line */
@@ -1670,8 +1677,8 @@ read_rtc:
}
if (want_irq) {
- err = devm_request_threaded_irq(ds1307->dev,
- ds1307->irq, NULL, irq_handler,
+ err = devm_request_threaded_irq(ds1307->dev, client->irq, NULL,
+ chip->irq_handler ?: ds1307_irq,
IRQF_SHARED | IRQF_ONESHOT,
ds1307->name, ds1307);
if (err) {
@@ -1679,8 +1686,9 @@ read_rtc:
device_set_wakeup_capable(ds1307->dev, false);
clear_bit(HAS_ALARM, &ds1307->flags);
dev_err(ds1307->dev, "unable to request IRQ!\n");
- } else
+ } else {
dev_dbg(ds1307->dev, "got IRQ %d\n", client->irq);
+ }
}
if (chip->nvram_size) {
@@ -1691,13 +1699,12 @@ read_rtc:
ds1307->nvmem_cfg.reg_read = ds1307_nvram_read;
ds1307->nvmem_cfg.reg_write = ds1307_nvram_write;
ds1307->nvmem_cfg.priv = ds1307;
- ds1307->nvram_offset = chip->nvram_offset;
ds1307->rtc->nvmem_config = &ds1307->nvmem_cfg;
ds1307->rtc->nvram_old_abi = true;
}
- ds1307->rtc->ops = rtc_ops;
+ ds1307->rtc->ops = chip->rtc_ops ?: &ds13xx_rtc_ops;
err = rtc_register_device(ds1307->rtc);
if (err)
return err;
diff --git a/drivers/rtc/rtc-ds1672.c b/drivers/rtc/rtc-ds1672.c
index 7bf46bfe11a4..9caaccccaa57 100644
--- a/drivers/rtc/rtc-ds1672.c
+++ b/drivers/rtc/rtc-ds1672.c
@@ -190,7 +190,7 @@ static int ds1672_probe(struct i2c_client *client,
return 0;
}
-static struct i2c_device_id ds1672_id[] = {
+static const struct i2c_device_id ds1672_id[] = {
{ "ds1672", 0 },
{ }
};
diff --git a/drivers/rtc/rtc-em3027.c b/drivers/rtc/rtc-em3027.c
index 4f4930a2004c..b0ef8cfe742d 100644
--- a/drivers/rtc/rtc-em3027.c
+++ b/drivers/rtc/rtc-em3027.c
@@ -132,7 +132,7 @@ static int em3027_probe(struct i2c_client *client,
return 0;
}
-static struct i2c_device_id em3027_id[] = {
+static const struct i2c_device_id em3027_id[] = {
{ "em3027", 0 },
{ }
};
diff --git a/drivers/rtc/rtc-goldfish.c b/drivers/rtc/rtc-goldfish.c
new file mode 100644
index 000000000000..d67769265185
--- /dev/null
+++ b/drivers/rtc/rtc-goldfish.c
@@ -0,0 +1,237 @@
+/* drivers/rtc/rtc-goldfish.c
+ *
+ * Copyright (C) 2007 Google, Inc.
+ * Copyright (C) 2017 Imagination Technologies Ltd.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/rtc.h>
+#include <linux/io.h>
+
+#define TIMER_TIME_LOW 0x00 /* get low bits of current time */
+ /* and update TIMER_TIME_HIGH */
+#define TIMER_TIME_HIGH 0x04 /* get high bits of time at last */
+ /* TIMER_TIME_LOW read */
+#define TIMER_ALARM_LOW 0x08 /* set low bits of alarm and */
+ /* activate it */
+#define TIMER_ALARM_HIGH 0x0c /* set high bits of next alarm */
+#define TIMER_IRQ_ENABLED 0x10
+#define TIMER_CLEAR_ALARM 0x14
+#define TIMER_ALARM_STATUS 0x18
+#define TIMER_CLEAR_INTERRUPT 0x1c
+
+struct goldfish_rtc {
+ void __iomem *base;
+ int irq;
+ struct rtc_device *rtc;
+};
+
+static int goldfish_rtc_read_alarm(struct device *dev,
+ struct rtc_wkalrm *alrm)
+{
+ u64 rtc_alarm;
+ u64 rtc_alarm_low;
+ u64 rtc_alarm_high;
+ void __iomem *base;
+ struct goldfish_rtc *rtcdrv;
+
+ rtcdrv = dev_get_drvdata(dev);
+ base = rtcdrv->base;
+
+ rtc_alarm_low = readl(base + TIMER_ALARM_LOW);
+ rtc_alarm_high = readl(base + TIMER_ALARM_HIGH);
+ rtc_alarm = (rtc_alarm_high << 32) | rtc_alarm_low;
+
+ do_div(rtc_alarm, NSEC_PER_SEC);
+ memset(alrm, 0, sizeof(struct rtc_wkalrm));
+
+ rtc_time_to_tm(rtc_alarm, &alrm->time);
+
+ if (readl(base + TIMER_ALARM_STATUS))
+ alrm->enabled = 1;
+ else
+ alrm->enabled = 0;
+
+ return 0;
+}
+
+static int goldfish_rtc_set_alarm(struct device *dev,
+ struct rtc_wkalrm *alrm)
+{
+ struct goldfish_rtc *rtcdrv;
+ unsigned long rtc_alarm;
+ u64 rtc_alarm64;
+ u64 rtc_status_reg;
+ void __iomem *base;
+ int ret = 0;
+
+ rtcdrv = dev_get_drvdata(dev);
+ base = rtcdrv->base;
+
+ if (alrm->enabled) {
+ ret = rtc_tm_to_time(&alrm->time, &rtc_alarm);
+ if (ret != 0)
+ return ret;
+
+ rtc_alarm64 = rtc_alarm * NSEC_PER_SEC;
+ writel((rtc_alarm64 >> 32), base + TIMER_ALARM_HIGH);
+ writel(rtc_alarm64, base + TIMER_ALARM_LOW);
+ } else {
+ /*
+ * if this function was called with enabled=0
+ * then it could mean that the application is
+ * trying to cancel an ongoing alarm
+ */
+ rtc_status_reg = readl(base + TIMER_ALARM_STATUS);
+ if (rtc_status_reg)
+ writel(1, base + TIMER_CLEAR_ALARM);
+ }
+
+ return ret;
+}
+
+static int goldfish_rtc_alarm_irq_enable(struct device *dev,
+ unsigned int enabled)
+{
+ void __iomem *base;
+ struct goldfish_rtc *rtcdrv;
+
+ rtcdrv = dev_get_drvdata(dev);
+ base = rtcdrv->base;
+
+ if (enabled)
+ writel(1, base + TIMER_IRQ_ENABLED);
+ else
+ writel(0, base + TIMER_IRQ_ENABLED);
+
+ return 0;
+}
+
+static irqreturn_t goldfish_rtc_interrupt(int irq, void *dev_id)
+{
+ struct goldfish_rtc *rtcdrv = dev_id;
+ void __iomem *base = rtcdrv->base;
+
+ writel(1, base + TIMER_CLEAR_INTERRUPT);
+
+ rtc_update_irq(rtcdrv->rtc, 1, RTC_IRQF | RTC_AF);
+
+ return IRQ_HANDLED;
+}
+
+static int goldfish_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+ struct goldfish_rtc *rtcdrv;
+ void __iomem *base;
+ u64 time_high;
+ u64 time_low;
+ u64 time;
+
+ rtcdrv = dev_get_drvdata(dev);
+ base = rtcdrv->base;
+
+ time_low = readl(base + TIMER_TIME_LOW);
+ time_high = readl(base + TIMER_TIME_HIGH);
+ time = (time_high << 32) | time_low;
+
+ do_div(time, NSEC_PER_SEC);
+
+ rtc_time_to_tm(time, tm);
+
+ return 0;
+}
+
+static int goldfish_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+ struct goldfish_rtc *rtcdrv;
+ void __iomem *base;
+ unsigned long now;
+ u64 now64;
+ int ret;
+
+ rtcdrv = dev_get_drvdata(dev);
+ base = rtcdrv->base;
+
+ ret = rtc_tm_to_time(tm, &now);
+ if (ret == 0) {
+ now64 = now * NSEC_PER_SEC;
+ writel((now64 >> 32), base + TIMER_TIME_HIGH);
+ writel(now64, base + TIMER_TIME_LOW);
+ }
+
+ return ret;
+}
+
+static const struct rtc_class_ops goldfish_rtc_ops = {
+ .read_time = goldfish_rtc_read_time,
+ .set_time = goldfish_rtc_set_time,
+ .read_alarm = goldfish_rtc_read_alarm,
+ .set_alarm = goldfish_rtc_set_alarm,
+ .alarm_irq_enable = goldfish_rtc_alarm_irq_enable
+};
+
+static int goldfish_rtc_probe(struct platform_device *pdev)
+{
+ struct goldfish_rtc *rtcdrv;
+ struct resource *r;
+ int err;
+
+ rtcdrv = devm_kzalloc(&pdev->dev, sizeof(*rtcdrv), GFP_KERNEL);
+ if (!rtcdrv)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, rtcdrv);
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!r)
+ return -ENODEV;
+
+ rtcdrv->base = devm_ioremap_resource(&pdev->dev, r);
+ if (IS_ERR(rtcdrv->base))
+ return -ENODEV;
+
+ rtcdrv->irq = platform_get_irq(pdev, 0);
+ if (rtcdrv->irq < 0)
+ return -ENODEV;
+
+ rtcdrv->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
+ &goldfish_rtc_ops,
+ THIS_MODULE);
+ if (IS_ERR(rtcdrv->rtc))
+ return PTR_ERR(rtcdrv->rtc);
+
+ err = devm_request_irq(&pdev->dev, rtcdrv->irq,
+ goldfish_rtc_interrupt,
+ 0, pdev->name, rtcdrv);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static const struct of_device_id goldfish_rtc_of_match[] = {
+ { .compatible = "google,goldfish-rtc", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, goldfish_rtc_of_match);
+
+static struct platform_driver goldfish_rtc = {
+ .probe = goldfish_rtc_probe,
+ .driver = {
+ .name = "goldfish_rtc",
+ .of_match_table = goldfish_rtc_of_match,
+ }
+};
+
+module_platform_driver(goldfish_rtc);
diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c
index 8940e9e43ea0..f4c070ea8384 100644
--- a/drivers/rtc/rtc-m41t80.c
+++ b/drivers/rtc/rtc-m41t80.c
@@ -440,28 +440,6 @@ static int m41t80_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(m41t80_pm, m41t80_suspend, m41t80_resume);
-static ssize_t flags_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct i2c_client *client = to_i2c_client(dev);
- int val;
-
- val = i2c_smbus_read_byte_data(client, M41T80_REG_FLAGS);
- if (val < 0)
- return val;
- return sprintf(buf, "%#x\n", val);
-}
-static DEVICE_ATTR_RO(flags);
-
-static struct attribute *attrs[] = {
- &dev_attr_flags.attr,
- NULL,
-};
-
-static struct attribute_group attr_group = {
- .attrs = attrs,
-};
-
#ifdef CONFIG_COMMON_CLK
#define sqw_to_m41t80_data(_hw) container_of(_hw, struct m41t80_data, sqw)
@@ -912,13 +890,6 @@ static struct notifier_block wdt_notifier = {
*****************************************************************************
*/
-static void m41t80_remove_sysfs_group(void *_dev)
-{
- struct device *dev = _dev;
-
- sysfs_remove_group(&dev->kobj, &attr_group);
-}
-
static int m41t80_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -927,6 +898,7 @@ static int m41t80_probe(struct i2c_client *client,
struct rtc_device *rtc = NULL;
struct rtc_time tm;
struct m41t80_data *m41t80_data = NULL;
+ bool wakeup_source = false;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_I2C_BLOCK |
I2C_FUNC_SMBUS_BYTE_DATA)) {
@@ -947,6 +919,10 @@ static int m41t80_probe(struct i2c_client *client,
m41t80_data->features = id->driver_data;
i2c_set_clientdata(client, m41t80_data);
+#ifdef CONFIG_OF
+ wakeup_source = of_property_read_bool(client->dev.of_node,
+ "wakeup-source");
+#endif
if (client->irq > 0) {
rc = devm_request_threaded_irq(&client->dev, client->irq,
NULL, m41t80_handle_irq,
@@ -955,14 +931,16 @@ static int m41t80_probe(struct i2c_client *client,
if (rc) {
dev_warn(&client->dev, "unable to request IRQ, alarms disabled\n");
client->irq = 0;
- } else {
- m41t80_rtc_ops.read_alarm = m41t80_read_alarm;
- m41t80_rtc_ops.set_alarm = m41t80_set_alarm;
- m41t80_rtc_ops.alarm_irq_enable = m41t80_alarm_irq_enable;
- /* Enable the wakealarm */
- device_init_wakeup(&client->dev, true);
+ wakeup_source = false;
}
}
+ if (client->irq > 0 || wakeup_source) {
+ m41t80_rtc_ops.read_alarm = m41t80_read_alarm;
+ m41t80_rtc_ops.set_alarm = m41t80_set_alarm;
+ m41t80_rtc_ops.alarm_irq_enable = m41t80_alarm_irq_enable;
+ /* Enable the wakealarm */
+ device_init_wakeup(&client->dev, true);
+ }
rtc = devm_rtc_device_register(&client->dev, client->name,
&m41t80_rtc_ops, THIS_MODULE);
@@ -970,6 +948,10 @@ static int m41t80_probe(struct i2c_client *client,
return PTR_ERR(rtc);
m41t80_data->rtc = rtc;
+ if (client->irq <= 0) {
+ /* We cannot support UIE mode if we do not have an IRQ line */
+ rtc->uie_unsupported = 1;
+ }
/* Make sure HT (Halt Update) bit is cleared */
rc = i2c_smbus_read_byte_data(client, M41T80_REG_ALARM_HOUR);
@@ -1004,21 +986,6 @@ static int m41t80_probe(struct i2c_client *client,
return rc;
}
- /* Export sysfs entries */
- rc = sysfs_create_group(&(&client->dev)->kobj, &attr_group);
- if (rc) {
- dev_err(&client->dev, "Failed to create sysfs group: %d\n", rc);
- return rc;
- }
-
- rc = devm_add_action_or_reset(&client->dev, m41t80_remove_sysfs_group,
- &client->dev);
- if (rc) {
- dev_err(&client->dev,
- "Failed to add sysfs cleanup action: %d\n", rc);
- return rc;
- }
-
#ifdef CONFIG_RTC_DRV_M41T80_WDT
if (m41t80_data->features & M41T80_FEATURE_HT) {
save_client = client;
diff --git a/drivers/rtc/rtc-max6900.c b/drivers/rtc/rtc-max6900.c
index 48b6b411f8b2..cbdc86a560ba 100644
--- a/drivers/rtc/rtc-max6900.c
+++ b/drivers/rtc/rtc-max6900.c
@@ -226,7 +226,7 @@ max6900_probe(struct i2c_client *client, const struct i2c_device_id *id)
return 0;
}
-static struct i2c_device_id max6900_id[] = {
+static const struct i2c_device_id max6900_id[] = {
{ "max6900", 0 },
{ }
};
diff --git a/drivers/rtc/rtc-max8925.c b/drivers/rtc/rtc-max8925.c
index 16d129a0bb3b..67d6fc2d23e6 100644
--- a/drivers/rtc/rtc-max8925.c
+++ b/drivers/rtc/rtc-max8925.c
@@ -234,8 +234,6 @@ static int max8925_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
ret = max8925_reg_write(info->rtc, MAX8925_ALARM0_CNTL, 0x77);
else
ret = max8925_reg_write(info->rtc, MAX8925_ALARM0_CNTL, 0x0);
- if (ret < 0)
- goto out;
out:
return ret;
}
diff --git a/drivers/rtc/rtc-mxc.c b/drivers/rtc/rtc-mxc.c
index 401f46d8f21b..bce427d202ee 100644
--- a/drivers/rtc/rtc-mxc.c
+++ b/drivers/rtc/rtc-mxc.c
@@ -238,26 +238,6 @@ static irqreturn_t mxc_rtc_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}
-/*
- * Clear all interrupts and release the IRQ
- */
-static void mxc_rtc_release(struct device *dev)
-{
- struct platform_device *pdev = to_platform_device(dev);
- struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
- void __iomem *ioaddr = pdata->ioaddr;
-
- spin_lock_irq(&pdata->rtc->irq_lock);
-
- /* Disable all rtc interrupts */
- writew(0, ioaddr + RTC_RTCIENR);
-
- /* Clear all interrupt status */
- writew(0xffffffff, ioaddr + RTC_RTCISR);
-
- spin_unlock_irq(&pdata->rtc->irq_lock);
-}
-
static int mxc_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
mxc_rtc_irq_enable(dev, RTC_ALM_BIT, enabled);
@@ -343,7 +323,6 @@ static int mxc_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
/* RTC layer */
static const struct rtc_class_ops mxc_rtc_ops = {
- .release = mxc_rtc_release,
.read_time = mxc_rtc_read_time,
.set_mmss64 = mxc_rtc_set_mmss,
.read_alarm = mxc_rtc_read_alarm,
diff --git a/drivers/rtc/rtc-puv3.c b/drivers/rtc/rtc-puv3.c
index c0a6e638c672..9e83be32ff43 100644
--- a/drivers/rtc/rtc-puv3.c
+++ b/drivers/rtc/rtc-puv3.c
@@ -157,49 +157,7 @@ static int puv3_rtc_proc(struct device *dev, struct seq_file *seq)
return 0;
}
-static int puv3_rtc_open(struct device *dev)
-{
- struct platform_device *pdev = to_platform_device(dev);
- struct rtc_device *rtc_dev = platform_get_drvdata(pdev);
- int ret;
-
- ret = request_irq(puv3_rtc_alarmno, puv3_rtc_alarmirq,
- 0, "pkunity-rtc alarm", rtc_dev);
-
- if (ret) {
- dev_err(dev, "IRQ%d error %d\n", puv3_rtc_alarmno, ret);
- return ret;
- }
-
- ret = request_irq(puv3_rtc_tickno, puv3_rtc_tickirq,
- 0, "pkunity-rtc tick", rtc_dev);
-
- if (ret) {
- dev_err(dev, "IRQ%d error %d\n", puv3_rtc_tickno, ret);
- goto tick_err;
- }
-
- return ret;
-
- tick_err:
- free_irq(puv3_rtc_alarmno, rtc_dev);
- return ret;
-}
-
-static void puv3_rtc_release(struct device *dev)
-{
- struct platform_device *pdev = to_platform_device(dev);
- struct rtc_device *rtc_dev = platform_get_drvdata(pdev);
-
- /* do not clear AIE here, it may be needed for wake */
- puv3_rtc_setpie(dev, 0);
- free_irq(puv3_rtc_alarmno, rtc_dev);
- free_irq(puv3_rtc_tickno, rtc_dev);
-}
-
static const struct rtc_class_ops puv3_rtcops = {
- .open = puv3_rtc_open,
- .release = puv3_rtc_release,
.read_time = puv3_rtc_gettime,
.set_time = puv3_rtc_settime,
.read_alarm = puv3_rtc_getalarm,
@@ -222,10 +180,6 @@ static void puv3_rtc_enable(struct device *dev, int en)
static int puv3_rtc_remove(struct platform_device *dev)
{
- struct rtc_device *rtc = platform_get_drvdata(dev);
-
- rtc_device_unregister(rtc);
-
puv3_rtc_setpie(&dev->dev, 0);
puv3_rtc_setaie(&dev->dev, 0);
@@ -259,6 +213,24 @@ static int puv3_rtc_probe(struct platform_device *pdev)
dev_dbg(&pdev->dev, "PKUnity_rtc: tick irq %d, alarm irq %d\n",
puv3_rtc_tickno, puv3_rtc_alarmno);
+ rtc = devm_rtc_allocate_device(&pdev->dev);
+ if (IS_ERR(rtc))
+ return PTR_ERR(rtc);
+
+ ret = devm_request_irq(&pdev->dev, puv3_rtc_alarmno, puv3_rtc_alarmirq,
+ 0, "pkunity-rtc alarm", rtc);
+ if (ret) {
+ dev_err(&pdev->dev, "IRQ%d error %d\n", puv3_rtc_alarmno, ret);
+ return ret;
+ }
+
+ ret = devm_request_irq(&pdev->dev, puv3_rtc_tickno, puv3_rtc_tickirq,
+ 0, "pkunity-rtc tick", rtc);
+ if (ret) {
+ dev_err(&pdev->dev, "IRQ%d error %d\n", puv3_rtc_tickno, ret);
+ return ret;
+ }
+
/* get the memory region */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res == NULL) {
@@ -278,12 +250,10 @@ static int puv3_rtc_probe(struct platform_device *pdev)
puv3_rtc_enable(&pdev->dev, 1);
/* register RTC and exit */
- rtc = rtc_device_register("pkunity", &pdev->dev, &puv3_rtcops,
- THIS_MODULE);
-
- if (IS_ERR(rtc)) {
+ rtc->ops = &puv3_rtcops;
+ ret = rtc_register_device(rtc);
+ if (ret) {
dev_err(&pdev->dev, "cannot attach rtc\n");
- ret = PTR_ERR(rtc);
goto err_nortc;
}
diff --git a/drivers/rtc/rtc-pxa.c b/drivers/rtc/rtc-pxa.c
index fe4985b54608..47304f5664d8 100644
--- a/drivers/rtc/rtc-pxa.c
+++ b/drivers/rtc/rtc-pxa.c
@@ -348,7 +348,7 @@ static int __init pxa_rtc_probe(struct platform_device *pdev)
dev_err(dev, "No alarm IRQ resource defined\n");
return -ENXIO;
}
- pxa_rtc_open(dev);
+
pxa_rtc->base = devm_ioremap(dev, pxa_rtc->ress->start,
resource_size(pxa_rtc->ress));
if (!pxa_rtc->base) {
@@ -356,6 +356,8 @@ static int __init pxa_rtc_probe(struct platform_device *pdev)
return -ENOMEM;
}
+ pxa_rtc_open(dev);
+
sa1100_rtc->rcnr = pxa_rtc->base + 0x0;
sa1100_rtc->rtsr = pxa_rtc->base + 0x8;
sa1100_rtc->rtar = pxa_rtc->base + 0x4;
diff --git a/drivers/rtc/rtc-rtd119x.c b/drivers/rtc/rtc-rtd119x.c
new file mode 100644
index 000000000000..b233559d950b
--- /dev/null
+++ b/drivers/rtc/rtc-rtd119x.c
@@ -0,0 +1,242 @@
+/*
+ * Realtek RTD129x RTC
+ *
+ * Copyright (c) 2017 Andreas Färber
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/rtc.h>
+#include <linux/spinlock.h>
+
+#define RTD_RTCSEC 0x00
+#define RTD_RTCMIN 0x04
+#define RTD_RTCHR 0x08
+#define RTD_RTCDATE1 0x0c
+#define RTD_RTCDATE2 0x10
+#define RTD_RTCACR 0x28
+#define RTD_RTCEN 0x2c
+#define RTD_RTCCR 0x30
+
+#define RTD_RTCSEC_RTCSEC_MASK 0x7f
+
+#define RTD_RTCMIN_RTCMIN_MASK 0x3f
+
+#define RTD_RTCHR_RTCHR_MASK 0x1f
+
+#define RTD_RTCDATE1_RTCDATE1_MASK 0xff
+
+#define RTD_RTCDATE2_RTCDATE2_MASK 0x7f
+
+#define RTD_RTCACR_RTCPWR BIT(7)
+
+#define RTD_RTCEN_RTCEN_MASK 0xff
+
+#define RTD_RTCCR_RTCRST BIT(6)
+
+struct rtd119x_rtc {
+ void __iomem *base;
+ struct clk *clk;
+ struct rtc_device *rtcdev;
+ unsigned int base_year;
+};
+
+static inline int rtd119x_rtc_days_in_year(int year)
+{
+ return 365 + (is_leap_year(year) ? 1 : 0);
+}
+
+static void rtd119x_rtc_reset(struct device *dev)
+{
+ struct rtd119x_rtc *data = dev_get_drvdata(dev);
+ u32 val;
+
+ val = readl_relaxed(data->base + RTD_RTCCR);
+ val |= RTD_RTCCR_RTCRST;
+ writel_relaxed(val, data->base + RTD_RTCCR);
+
+ val &= ~RTD_RTCCR_RTCRST;
+ writel(val, data->base + RTD_RTCCR);
+}
+
+static void rtd119x_rtc_set_enabled(struct device *dev, bool enable)
+{
+ struct rtd119x_rtc *data = dev_get_drvdata(dev);
+ u32 val;
+
+ val = readl_relaxed(data->base + RTD_RTCEN);
+ if (enable) {
+ if ((val & RTD_RTCEN_RTCEN_MASK) == 0x5a)
+ return;
+ writel_relaxed(0x5a, data->base + RTD_RTCEN);
+ } else {
+ writel_relaxed(0, data->base + RTD_RTCEN);
+ }
+}
+
+static int rtd119x_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+ struct rtd119x_rtc *data = dev_get_drvdata(dev);
+ s32 day;
+ u32 sec;
+ unsigned int year;
+ int tries = 0;
+
+ while (true) {
+ tm->tm_sec = (readl_relaxed(data->base + RTD_RTCSEC) & RTD_RTCSEC_RTCSEC_MASK) >> 1;
+ tm->tm_min = readl_relaxed(data->base + RTD_RTCMIN) & RTD_RTCMIN_RTCMIN_MASK;
+ tm->tm_hour = readl_relaxed(data->base + RTD_RTCHR) & RTD_RTCHR_RTCHR_MASK;
+ day = readl_relaxed(data->base + RTD_RTCDATE1) & RTD_RTCDATE1_RTCDATE1_MASK;
+ day |= (readl_relaxed(data->base + RTD_RTCDATE2) & RTD_RTCDATE2_RTCDATE2_MASK) << 8;
+ sec = (readl_relaxed(data->base + RTD_RTCSEC) & RTD_RTCSEC_RTCSEC_MASK) >> 1;
+ tries++;
+
+ if (sec == tm->tm_sec)
+ break;
+
+ if (tries >= 3)
+ return -EINVAL;
+ }
+ if (tries > 1)
+ dev_dbg(dev, "%s: needed %i tries\n", __func__, tries);
+
+ year = data->base_year;
+ while (day >= rtd119x_rtc_days_in_year(year)) {
+ day -= rtd119x_rtc_days_in_year(year);
+ year++;
+ }
+ tm->tm_year = year - 1900;
+ tm->tm_yday = day;
+
+ tm->tm_mon = 0;
+ while (day >= rtc_month_days(tm->tm_mon, year)) {
+ day -= rtc_month_days(tm->tm_mon, year);
+ tm->tm_mon++;
+ }
+ tm->tm_mday = day + 1;
+
+ return 0;
+}
+
+static int rtd119x_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+ struct rtd119x_rtc *data = dev_get_drvdata(dev);
+ unsigned int day;
+ int i;
+
+ if (1900 + tm->tm_year < data->base_year)
+ return -EINVAL;
+
+ day = 0;
+ for (i = data->base_year; i < 1900 + tm->tm_year; i++)
+ day += rtd119x_rtc_days_in_year(i);
+
+ day += tm->tm_yday;
+ if (day > 0x7fff)
+ return -EINVAL;
+
+ rtd119x_rtc_set_enabled(dev, false);
+
+ writel_relaxed((tm->tm_sec << 1) & RTD_RTCSEC_RTCSEC_MASK, data->base + RTD_RTCSEC);
+ writel_relaxed(tm->tm_min & RTD_RTCMIN_RTCMIN_MASK, data->base + RTD_RTCMIN);
+ writel_relaxed(tm->tm_hour & RTD_RTCHR_RTCHR_MASK, data->base + RTD_RTCHR);
+ writel_relaxed(day & RTD_RTCDATE1_RTCDATE1_MASK, data->base + RTD_RTCDATE1);
+ writel_relaxed((day >> 8) & RTD_RTCDATE2_RTCDATE2_MASK, data->base + RTD_RTCDATE2);
+
+ rtd119x_rtc_set_enabled(dev, true);
+
+ return 0;
+}
+
+static const struct rtc_class_ops rtd119x_rtc_ops = {
+ .read_time = rtd119x_rtc_read_time,
+ .set_time = rtd119x_rtc_set_time,
+};
+
+static const struct of_device_id rtd119x_rtc_dt_ids[] = {
+ { .compatible = "realtek,rtd1295-rtc" },
+ { }
+};
+
+static int rtd119x_rtc_probe(struct platform_device *pdev)
+{
+ struct rtd119x_rtc *data;
+ struct resource *res;
+ u32 val;
+ int ret;
+
+ data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, data);
+ data->base_year = 2014;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ data->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(data->base))
+ return PTR_ERR(data->base);
+
+ data->clk = of_clk_get(pdev->dev.of_node, 0);
+ if (IS_ERR(data->clk))
+ return PTR_ERR(data->clk);
+
+ ret = clk_prepare_enable(data->clk);
+ if (ret) {
+ clk_put(data->clk);
+ return ret;
+ }
+
+ val = readl_relaxed(data->base + RTD_RTCACR);
+ if (!(val & RTD_RTCACR_RTCPWR)) {
+ writel_relaxed(RTD_RTCACR_RTCPWR, data->base + RTD_RTCACR);
+
+ rtd119x_rtc_reset(&pdev->dev);
+
+ writel_relaxed(0, data->base + RTD_RTCMIN);
+ writel_relaxed(0, data->base + RTD_RTCHR);
+ writel_relaxed(0, data->base + RTD_RTCDATE1);
+ writel_relaxed(0, data->base + RTD_RTCDATE2);
+ }
+
+ rtd119x_rtc_set_enabled(&pdev->dev, true);
+
+ data->rtcdev = devm_rtc_device_register(&pdev->dev, "rtc",
+ &rtd119x_rtc_ops, THIS_MODULE);
+ if (IS_ERR(data->rtcdev)) {
+ dev_err(&pdev->dev, "failed to register rtc device");
+ clk_disable_unprepare(data->clk);
+ clk_put(data->clk);
+ return PTR_ERR(data->rtcdev);
+ }
+
+ return 0;
+}
+
+static int rtd119x_rtc_remove(struct platform_device *pdev)
+{
+ struct rtd119x_rtc *data = platform_get_drvdata(pdev);
+
+ rtd119x_rtc_set_enabled(&pdev->dev, false);
+
+ clk_disable_unprepare(data->clk);
+ clk_put(data->clk);
+
+ return 0;
+}
+
+static struct platform_driver rtd119x_rtc_driver = {
+ .probe = rtd119x_rtc_probe,
+ .remove = rtd119x_rtc_remove,
+ .driver = {
+ .name = "rtd1295-rtc",
+ .of_match_table = rtd119x_rtc_dt_ids,
+ },
+};
+builtin_platform_driver(rtd119x_rtc_driver);
diff --git a/drivers/rtc/rtc-rv3029c2.c b/drivers/rtc/rtc-rv3029c2.c
index 85fa1da03762..aa09771de04f 100644
--- a/drivers/rtc/rtc-rv3029c2.c
+++ b/drivers/rtc/rtc-rv3029c2.c
@@ -868,7 +868,7 @@ static int rv3029_i2c_probe(struct i2c_client *client,
return rv3029_probe(&client->dev, regmap, client->irq, client->name);
}
-static struct i2c_device_id rv3029_id[] = {
+static const struct i2c_device_id rv3029_id[] = {
{ "rv3029", 0 },
{ "rv3029c2", 0 },
{ }
diff --git a/drivers/rtc/rtc-s35390a.c b/drivers/rtc/rtc-s35390a.c
index 449820eeefe8..7067bca5c20d 100644
--- a/drivers/rtc/rtc-s35390a.c
+++ b/drivers/rtc/rtc-s35390a.c
@@ -106,33 +106,12 @@ static int s35390a_get_reg(struct s35390a *s35390a, int reg, char *buf, int len)
return 0;
}
-/*
- * Returns <0 on error, 0 if rtc is setup fine and 1 if the chip was reset.
- * To keep the information if an irq is pending, pass the value read from
- * STATUS1 to the caller.
- */
-static int s35390a_reset(struct s35390a *s35390a, char *status1)
+static int s35390a_init(struct s35390a *s35390a)
{
char buf;
int ret;
unsigned initcount = 0;
- ret = s35390a_get_reg(s35390a, S35390A_CMD_STATUS1, status1, 1);
- if (ret < 0)
- return ret;
-
- if (*status1 & S35390A_FLAG_POC)
- /*
- * Do not communicate for 0.5 seconds since the power-on
- * detection circuit is in operation.
- */
- msleep(500);
- else if (!(*status1 & S35390A_FLAG_BLD))
- /*
- * If both POC and BLD are unset everything is fine.
- */
- return 0;
-
/*
* At least one of POC and BLD are set, so reinitialise chip. Keeping
* this information in the hardware to know later that the time isn't
@@ -142,7 +121,6 @@ static int s35390a_reset(struct s35390a *s35390a, char *status1)
* The 24H bit is kept over reset, so set it already here.
*/
initialize:
- *status1 = S35390A_FLAG_24H;
buf = S35390A_FLAG_RESET | S35390A_FLAG_24H;
ret = s35390a_set_reg(s35390a, S35390A_CMD_STATUS1, &buf, 1);
@@ -165,6 +143,34 @@ initialize:
return 1;
}
+/*
+ * Returns <0 on error, 0 if rtc is setup fine and 1 if the chip was reset.
+ * To keep the information if an irq is pending, pass the value read from
+ * STATUS1 to the caller.
+ */
+static int s35390a_read_status(struct s35390a *s35390a, char *status1)
+{
+ int ret;
+
+ ret = s35390a_get_reg(s35390a, S35390A_CMD_STATUS1, status1, 1);
+ if (ret < 0)
+ return ret;
+
+ if (*status1 & S35390A_FLAG_POC) {
+ /*
+ * Do not communicate for 0.5 seconds since the power-on
+ * detection circuit is in operation.
+ */
+ msleep(500);
+ return 1;
+ } else if (*status1 & S35390A_FLAG_BLD)
+ return 1;
+ /*
+ * If both POC and BLD are unset everything is fine.
+ */
+ return 0;
+}
+
static int s35390a_disable_test_mode(struct s35390a *s35390a)
{
char buf[1];
@@ -208,13 +214,16 @@ static int s35390a_set_datetime(struct i2c_client *client, struct rtc_time *tm)
{
struct s35390a *s35390a = i2c_get_clientdata(client);
int i, err;
- char buf[7];
+ char buf[7], status;
dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d mday=%d, "
"mon=%d, year=%d, wday=%d\n", __func__, tm->tm_sec,
tm->tm_min, tm->tm_hour, tm->tm_mday, tm->tm_mon, tm->tm_year,
tm->tm_wday);
+ if (s35390a_read_status(s35390a, &status) == 1)
+ s35390a_init(s35390a);
+
buf[S35390A_BYTE_YEAR] = bin2bcd(tm->tm_year - 100);
buf[S35390A_BYTE_MONTH] = bin2bcd(tm->tm_mon + 1);
buf[S35390A_BYTE_DAY] = bin2bcd(tm->tm_mday);
@@ -235,9 +244,12 @@ static int s35390a_set_datetime(struct i2c_client *client, struct rtc_time *tm)
static int s35390a_get_datetime(struct i2c_client *client, struct rtc_time *tm)
{
struct s35390a *s35390a = i2c_get_clientdata(client);
- char buf[7];
+ char buf[7], status;
int i, err;
+ if (s35390a_read_status(s35390a, &status) == 1)
+ return -EINVAL;
+
err = s35390a_get_reg(s35390a, S35390A_CMD_TIME1, buf, sizeof(buf));
if (err < 0)
return err;
@@ -392,12 +404,42 @@ static int s35390a_rtc_set_time(struct device *dev, struct rtc_time *tm)
return s35390a_set_datetime(to_i2c_client(dev), tm);
}
+static int s35390a_rtc_ioctl(struct device *dev, unsigned int cmd,
+ unsigned long arg)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct s35390a *s35390a = i2c_get_clientdata(client);
+ char sts;
+ int err;
+
+ switch (cmd) {
+ case RTC_VL_READ:
+ /* s35390a_reset set lowvoltage flag and init RTC if needed */
+ err = s35390a_read_status(s35390a, &sts);
+ if (err < 0)
+ return err;
+ if (copy_to_user((void __user *)arg, &err, sizeof(int)))
+ return -EFAULT;
+ break;
+ case RTC_VL_CLR:
+ /* update flag and clear register */
+ err = s35390a_init(s35390a);
+ if (err < 0)
+ return err;
+ break;
+ default:
+ return -ENOIOCTLCMD;
+ }
+
+ return 0;
+}
+
static const struct rtc_class_ops s35390a_rtc_ops = {
.read_time = s35390a_rtc_read_time,
.set_time = s35390a_rtc_set_time,
.set_alarm = s35390a_rtc_set_alarm,
.read_alarm = s35390a_rtc_read_alarm,
-
+ .ioctl = s35390a_rtc_ioctl,
};
static struct i2c_driver s35390a_driver;
@@ -405,7 +447,7 @@ static struct i2c_driver s35390a_driver;
static int s35390a_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
- int err, err_reset;
+ int err, err_read;
unsigned int i;
struct s35390a *s35390a;
struct rtc_time tm;
@@ -438,9 +480,9 @@ static int s35390a_probe(struct i2c_client *client,
}
}
- err_reset = s35390a_reset(s35390a, &status1);
- if (err_reset < 0) {
- err = err_reset;
+ err_read = s35390a_read_status(s35390a, &status1);
+ if (err_read < 0) {
+ err = err_read;
dev_err(&client->dev, "error resetting chip\n");
goto exit_dummy;
}
@@ -466,7 +508,7 @@ static int s35390a_probe(struct i2c_client *client,
}
}
- if (err_reset > 0 || s35390a_get_datetime(client, &tm) < 0)
+ if (err_read > 0 || s35390a_get_datetime(client, &tm) < 0)
dev_warn(&client->dev, "clock needs to be set\n");
device_set_wakeup_capable(&client->dev, 1);
diff --git a/drivers/rtc/rtc-sa1100.c b/drivers/rtc/rtc-sa1100.c
index c2187bf6c7e4..ed71d1113627 100644
--- a/drivers/rtc/rtc-sa1100.c
+++ b/drivers/rtc/rtc-sa1100.c
@@ -95,46 +95,6 @@ static irqreturn_t sa1100_rtc_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}
-static int sa1100_rtc_open(struct device *dev)
-{
- struct sa1100_rtc *info = dev_get_drvdata(dev);
- struct rtc_device *rtc = info->rtc;
- int ret;
-
- ret = request_irq(info->irq_1hz, sa1100_rtc_interrupt, 0, "rtc 1Hz", dev);
- if (ret) {
- dev_err(dev, "IRQ %d already in use.\n", info->irq_1hz);
- goto fail_ui;
- }
- ret = request_irq(info->irq_alarm, sa1100_rtc_interrupt, 0, "rtc Alrm", dev);
- if (ret) {
- dev_err(dev, "IRQ %d already in use.\n", info->irq_alarm);
- goto fail_ai;
- }
- rtc->max_user_freq = RTC_FREQ;
- rtc_irq_set_freq(rtc, NULL, RTC_FREQ);
-
- return 0;
-
- fail_ai:
- free_irq(info->irq_1hz, dev);
- fail_ui:
- clk_disable_unprepare(info->clk);
- return ret;
-}
-
-static void sa1100_rtc_release(struct device *dev)
-{
- struct sa1100_rtc *info = dev_get_drvdata(dev);
-
- spin_lock_irq(&info->lock);
- writel_relaxed(0, info->rtsr);
- spin_unlock_irq(&info->lock);
-
- free_irq(info->irq_alarm, dev);
- free_irq(info->irq_1hz, dev);
-}
-
static int sa1100_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
u32 rtsr;
@@ -216,8 +176,6 @@ static int sa1100_rtc_proc(struct device *dev, struct seq_file *seq)
}
static const struct rtc_class_ops sa1100_rtc_ops = {
- .open = sa1100_rtc_open,
- .release = sa1100_rtc_release,
.read_time = sa1100_rtc_read_time,
.set_time = sa1100_rtc_set_time,
.read_alarm = sa1100_rtc_read_alarm,
@@ -265,6 +223,9 @@ int sa1100_rtc_init(struct platform_device *pdev, struct sa1100_rtc *info)
}
info->rtc = rtc;
+ rtc->max_user_freq = RTC_FREQ;
+ rtc_irq_set_freq(rtc, NULL, RTC_FREQ);
+
/* Fix for a nasty initialization problem the in SA11xx RTSR register.
* See also the comments in sa1100_rtc_interrupt().
*
@@ -299,6 +260,7 @@ static int sa1100_rtc_probe(struct platform_device *pdev)
struct resource *iores;
void __iomem *base;
int irq_1hz, irq_alarm;
+ int ret;
irq_1hz = platform_get_irq_byname(pdev, "rtc 1Hz");
irq_alarm = platform_get_irq_byname(pdev, "rtc alarm");
@@ -311,6 +273,19 @@ static int sa1100_rtc_probe(struct platform_device *pdev)
info->irq_1hz = irq_1hz;
info->irq_alarm = irq_alarm;
+ ret = devm_request_irq(&pdev->dev, irq_1hz, sa1100_rtc_interrupt, 0,
+ "rtc 1Hz", &pdev->dev);
+ if (ret) {
+ dev_err(&pdev->dev, "IRQ %d already in use.\n", irq_1hz);
+ return ret;
+ }
+ ret = devm_request_irq(&pdev->dev, irq_alarm, sa1100_rtc_interrupt, 0,
+ "rtc Alrm", &pdev->dev);
+ if (ret) {
+ dev_err(&pdev->dev, "IRQ %d already in use.\n", irq_alarm);
+ return ret;
+ }
+
iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(&pdev->dev, iores);
if (IS_ERR(base))
@@ -339,8 +314,12 @@ static int sa1100_rtc_remove(struct platform_device *pdev)
{
struct sa1100_rtc *info = platform_get_drvdata(pdev);
- if (info)
+ if (info) {
+ spin_lock_irq(&info->lock);
+ writel_relaxed(0, info->rtsr);
+ spin_unlock_irq(&info->lock);
clk_disable_unprepare(info->clk);
+ }
return 0;
}
diff --git a/drivers/rtc/rtc-sun6i.c b/drivers/rtc/rtc-sun6i.c
index 39cbc1238b92..3d2216ccd860 100644
--- a/drivers/rtc/rtc-sun6i.c
+++ b/drivers/rtc/rtc-sun6i.c
@@ -73,6 +73,9 @@
#define SUN6I_ALARM_CONFIG 0x0050
#define SUN6I_ALARM_CONFIG_WAKEUP BIT(0)
+#define SUN6I_LOSC_OUT_GATING 0x0060
+#define SUN6I_LOSC_OUT_GATING_EN BIT(0)
+
/*
* Get date values
*/
@@ -125,6 +128,7 @@ struct sun6i_rtc_dev {
struct clk_hw hw;
struct clk_hw *int_osc;
struct clk *losc;
+ struct clk *ext_losc;
spinlock_t lock;
};
@@ -188,23 +192,24 @@ static void __init sun6i_rtc_clk_init(struct device_node *node)
struct clk_init_data init = {
.ops = &sun6i_rtc_osc_ops,
};
+ const char *clkout_name = "osc32k-out";
const char *parents[2];
rtc = kzalloc(sizeof(*rtc), GFP_KERNEL);
if (!rtc)
return;
- spin_lock_init(&rtc->lock);
- clk_data = kzalloc(sizeof(*clk_data) + sizeof(*clk_data->hws),
+ clk_data = kzalloc(sizeof(*clk_data) + (sizeof(*clk_data->hws) * 2),
GFP_KERNEL);
if (!clk_data)
return;
+
spin_lock_init(&rtc->lock);
rtc->base = of_io_request_and_map(node, 0, of_node_full_name(node));
if (IS_ERR(rtc->base)) {
pr_crit("Can't map RTC registers");
- return;
+ goto err;
}
/* Switch to the external, more precise, oscillator */
@@ -216,7 +221,7 @@ static void __init sun6i_rtc_clk_init(struct device_node *node)
/* Deal with old DTs */
if (!of_get_property(node, "clocks", NULL))
- return;
+ goto err;
rtc->int_osc = clk_hw_register_fixed_rate_with_accuracy(NULL,
"rtc-int-osc",
@@ -235,7 +240,8 @@ static void __init sun6i_rtc_clk_init(struct device_node *node)
init.parent_names = parents;
init.num_parents = of_clk_get_parent_count(node) + 1;
- of_property_read_string(node, "clock-output-names", &init.name);
+ of_property_read_string_index(node, "clock-output-names", 0,
+ &init.name);
rtc->losc = clk_register(NULL, &rtc->hw);
if (IS_ERR(rtc->losc)) {
@@ -243,9 +249,25 @@ static void __init sun6i_rtc_clk_init(struct device_node *node)
return;
}
- clk_data->num = 1;
+ of_property_read_string_index(node, "clock-output-names", 1,
+ &clkout_name);
+ rtc->ext_losc = clk_register_gate(NULL, clkout_name, rtc->hw.init->name,
+ 0, rtc->base + SUN6I_LOSC_OUT_GATING,
+ SUN6I_LOSC_OUT_GATING_EN, 0,
+ &rtc->lock);
+ if (IS_ERR(rtc->ext_losc)) {
+ pr_crit("Couldn't register the LOSC external gate\n");
+ return;
+ }
+
+ clk_data->num = 2;
clk_data->hws[0] = &rtc->hw;
+ clk_data->hws[1] = __clk_get_hw(rtc->ext_losc);
of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
+ return;
+
+err:
+ kfree(clk_data);
}
CLK_OF_DECLARE_DRIVER(sun6i_rtc_clk, "allwinner,sun6i-a31-rtc",
sun6i_rtc_clk_init);
diff --git a/drivers/rtc/rtc-vr41xx.c b/drivers/rtc/rtc-vr41xx.c
index e1b86bb01062..7ce22967fd16 100644
--- a/drivers/rtc/rtc-vr41xx.c
+++ b/drivers/rtc/rtc-vr41xx.c
@@ -119,23 +119,6 @@ static inline void write_elapsed_second(unsigned long sec)
spin_unlock_irq(&rtc_lock);
}
-static void vr41xx_rtc_release(struct device *dev)
-{
-
- spin_lock_irq(&rtc_lock);
-
- rtc1_write(ECMPLREG, 0);
- rtc1_write(ECMPMREG, 0);
- rtc1_write(ECMPHREG, 0);
- rtc1_write(RTCL1LREG, 0);
- rtc1_write(RTCL1HREG, 0);
-
- spin_unlock_irq(&rtc_lock);
-
- disable_irq(aie_irq);
- disable_irq(pie_irq);
-}
-
static int vr41xx_rtc_read_time(struct device *dev, struct rtc_time *time)
{
unsigned long epoch_sec, elapsed_sec;
@@ -272,7 +255,6 @@ static irqreturn_t rtclong1_interrupt(int irq, void *dev_id)
}
static const struct rtc_class_ops vr41xx_rtc_ops = {
- .release = vr41xx_rtc_release,
.ioctl = vr41xx_rtc_ioctl,
.read_time = vr41xx_rtc_read_time,
.set_time = vr41xx_rtc_set_time,
diff --git a/include/linux/rtc.h b/include/linux/rtc.h
index 0a0f0d14a5fb..e6d0f9c1cafd 100644
--- a/include/linux/rtc.h
+++ b/include/linux/rtc.h
@@ -72,8 +72,6 @@ extern struct class *rtc_class;
* issued through ioctl() ...
*/
struct rtc_class_ops {
- int (*open)(struct device *);
- void (*release)(struct device *);
int (*ioctl)(struct device *, unsigned int, unsigned long);
int (*read_time)(struct device *, struct rtc_time *);
int (*set_time)(struct device *, struct rtc_time *);