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authorLinus Torvalds <torvalds@linux-foundation.org>2018-10-27 09:24:24 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-10-27 09:24:24 -0700
commitc7b7eefa57ae3c8802fdec7d07ac4df6c49d1e7a (patch)
tree7aac7dee4d94113648b210fe9dc4ba181dfc1ccf
parente5585453498907080c456ec5b51131867ed6d095 (diff)
parent3822d1bb0df18aa28930f19bc46e0704aea1be0f (diff)
download96b-common-c7b7eefa57ae3c8802fdec7d07ac4df6c49d1e7a.tar.gz
Merge tag 'rtc-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
Pull RTC updates from Alexandre Belloni: "This cycle, there were mostly non urgent fixes in drivers. I also finally unexported the non managed registration. Subsystem: - non devm managed registration is now removed from the driver API - all the unnecessary rtc_valid_tm() calls have been removed Drivers: - abx80X: watchdog support - cmos: fix non ACPI support - sc27xx: fix alarm support - Remove a possible sysfs race condition for ab8500, ds1307, ds1685, isl1208 - Fix a possible race condition where an irq handler may be called before the rtc_device struct is allocated for mt6397, pl030, menelaus, armada38x" * tag 'rtc-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (54 commits) rtc: sc27xx: Always read normal alarm when registering RTC device rtc: sc27xx: Add check to see if need to enable the alarm interrupt rtc: sc27xx: Remove interrupts disable and clear in probe() rtc: sc27xx: Clear SPG value update interrupt status rtc: sc27xx: Set wakeup capability before registering rtc device rtc: s35390a: Change buf's type to u8 in s35390a_init rtc: ds1307: fix ds1339 wakealarm support rtc: ds1685: simplify getting .driver_data rtc: m41t80: mark expected switch fall-through rtc: tegra: Propagate errors from platform_get_irq() rtc: cmos: Remove the `use_acpi_alarm' module parameter for !ACPI rtc: cmos: Fix non-ACPI undefined reference to `hpet_rtc_interrupt' rtc: mv: let the core handle invalid alarms rtc: vr41xx: switch to rtc_time64_to_tm/rtc_tm_to_time64 rtc: ab8500: remove useless check rtc: ab8500: let the core handle range rtc: ab8500: use rtc_add_group rtc: rs5c348: report error when time is invalid rtc: rs5c348: remove forward declaration rtc: rs5c348: remove useless label ...
-rw-r--r--arch/mips/Kconfig2
-rw-r--r--drivers/char/Kconfig2
-rw-r--r--drivers/rtc/Kconfig14
-rw-r--r--drivers/rtc/Makefile12
-rw-r--r--drivers/rtc/class.c12
-rw-r--r--drivers/rtc/interface.c3
-rw-r--r--drivers/rtc/rtc-ab8500.c96
-rw-r--r--drivers/rtc/rtc-abx80x.c143
-rw-r--r--drivers/rtc/rtc-armada38x.c46
-rw-r--r--drivers/rtc/rtc-cmos.c29
-rw-r--r--drivers/rtc/rtc-core.h14
-rw-r--r--drivers/rtc/rtc-ds1307.c145
-rw-r--r--drivers/rtc/rtc-ds1685.c194
-rw-r--r--drivers/rtc/rtc-isl1208.c34
-rw-r--r--drivers/rtc/rtc-lib.c2
-rw-r--r--drivers/rtc/rtc-m41t80.c2
-rw-r--r--drivers/rtc/rtc-mrst.c5
-rw-r--r--drivers/rtc/rtc-mt6397.c13
-rw-r--r--drivers/rtc/rtc-mv.c8
-rw-r--r--drivers/rtc/rtc-omap.c28
-rw-r--r--drivers/rtc/rtc-pl030.c15
-rw-r--r--drivers/rtc/rtc-pl031.c18
-rw-r--r--drivers/rtc/rtc-rs5c348.c65
-rw-r--r--drivers/rtc/rtc-rv8803.c7
-rw-r--r--drivers/rtc/rtc-s35390a.c2
-rw-r--r--drivers/rtc/rtc-sc27xx.c60
-rw-r--r--drivers/rtc/rtc-sun6i.c3
-rw-r--r--drivers/rtc/rtc-sysfs.c4
-rw-r--r--drivers/rtc/rtc-tegra.c10
-rw-r--r--drivers/rtc/rtc-test.c7
-rw-r--r--drivers/rtc/rtc-tx4939.c4
-rw-r--r--drivers/rtc/rtc-vr41xx.c9
-rw-r--r--include/linux/rtc.h21
33 files changed, 547 insertions, 482 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 53e75ddbba1c..80778b40f8fa 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -75,7 +75,7 @@ config MIPS
select MODULES_USE_ELF_RELA if MODULES && 64BIT
select MODULES_USE_ELF_REL if MODULES
select PERF_USE_VMALLOC
- select RTC_LIB if !MACH_LOONGSON64
+ select RTC_LIB
select SYSCTL_EXCEPTION_TRACE
select VIRT_TO_BUS
select NO_BOOTMEM
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 40728491f37b..9d03b2ff5df6 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -268,7 +268,7 @@ if RTC_LIB=n
config RTC
tristate "Enhanced Real Time Clock Support (legacy PC RTC driver)"
- depends on ALPHA || (MIPS && MACH_LOONGSON64)
+ depends on ALPHA
---help---
If you say Y here and create a character special file /dev/rtc with
major number 10 and minor number 135 using mknod ("man mknod"), you
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 7d7be60a2413..a819ef07b7ec 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -187,6 +187,7 @@ config RTC_DRV_ABB5ZES3
config RTC_DRV_ABX80X
tristate "Abracon ABx80x"
+ select WATCHDOG_CORE if WATCHDOG
help
If you say yes here you get support for Abracon AB080X and AB180X
families of ultra-low-power battery- and capacitor-backed real-time
@@ -1007,17 +1008,6 @@ config RTC_DRV_DS17885
endchoice
-config RTC_DS1685_PROC_REGS
- bool "Display register values in /proc"
- depends on RTC_DRV_DS1685_FAMILY && PROC_FS
- help
- Enable this to display a readout of all of the RTC registers in
- /proc/drivers/rtc. Keep in mind that this can potentially lead
- to lost interrupts, as reading Control Register C will clear
- all pending IRQ flags.
-
- Unless you are debugging this driver, choose N.
-
config RTC_DRV_DS1742
tristate "Maxim/Dallas DS1742/1743"
depends on HAS_IOMEM
@@ -1587,7 +1577,7 @@ config RTC_DRV_MPC5121
config RTC_DRV_JZ4740
tristate "Ingenic JZ4740 SoC"
- depends on MACH_INGENIC || COMPILE_TEST
+ depends on MIPS || COMPILE_TEST
help
If you say yes here you get support for the Ingenic JZ47xx SoCs RTC
controllers.
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 5ff2fc0c361a..290c1730fb0a 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -36,9 +36,9 @@ obj-$(CONFIG_RTC_DRV_ASM9260) += rtc-asm9260.o
obj-$(CONFIG_RTC_DRV_AT91RM9200)+= rtc-at91rm9200.o
obj-$(CONFIG_RTC_DRV_AT91SAM9) += rtc-at91sam9.o
obj-$(CONFIG_RTC_DRV_AU1XXX) += rtc-au1xxx.o
-obj-$(CONFIG_RTC_DRV_BRCMSTB) += rtc-brcmstb-waketimer.o
obj-$(CONFIG_RTC_DRV_BQ32K) += rtc-bq32k.o
obj-$(CONFIG_RTC_DRV_BQ4802) += rtc-bq4802.o
+obj-$(CONFIG_RTC_DRV_BRCMSTB) += rtc-brcmstb-waketimer.o
obj-$(CONFIG_RTC_DRV_CMOS) += rtc-cmos.o
obj-$(CONFIG_RTC_DRV_COH901331) += rtc-coh901331.o
obj-$(CONFIG_RTC_DRV_CPCAP) += rtc-cpcap.o
@@ -71,6 +71,7 @@ obj-$(CONFIG_RTC_DRV_EP93XX) += rtc-ep93xx.o
obj-$(CONFIG_RTC_DRV_FM3130) += rtc-fm3130.o
obj-$(CONFIG_RTC_DRV_FTRTC010) += rtc-ftrtc010.o
obj-$(CONFIG_RTC_DRV_GENERIC) += rtc-generic.o
+obj-$(CONFIG_RTC_DRV_GOLDFISH) += rtc-goldfish.o
obj-$(CONFIG_RTC_DRV_HID_SENSOR_TIME) += rtc-hid-sensor-time.o
obj-$(CONFIG_RTC_DRV_HYM8563) += rtc-hym8563.o
obj-$(CONFIG_RTC_DRV_IMXDI) += rtc-imxdi.o
@@ -78,10 +79,10 @@ obj-$(CONFIG_RTC_DRV_ISL12022) += rtc-isl12022.o
obj-$(CONFIG_RTC_DRV_ISL12026) += rtc-isl12026.o
obj-$(CONFIG_RTC_DRV_ISL1208) += rtc-isl1208.o
obj-$(CONFIG_RTC_DRV_JZ4740) += rtc-jz4740.o
+obj-$(CONFIG_RTC_DRV_LOONGSON1) += rtc-ls1x.o
obj-$(CONFIG_RTC_DRV_LP8788) += rtc-lp8788.o
obj-$(CONFIG_RTC_DRV_LPC24XX) += rtc-lpc24xx.o
obj-$(CONFIG_RTC_DRV_LPC32XX) += rtc-lpc32xx.o
-obj-$(CONFIG_RTC_DRV_LOONGSON1) += rtc-ls1x.o
obj-$(CONFIG_RTC_DRV_M41T80) += rtc-m41t80.o
obj-$(CONFIG_RTC_DRV_M41T93) += rtc-m41t93.o
obj-$(CONFIG_RTC_DRV_M41T94) += rtc-m41t94.o
@@ -100,7 +101,6 @@ obj-$(CONFIG_RTC_DRV_MC13XXX) += rtc-mc13xxx.o
obj-$(CONFIG_RTC_DRV_MCP795) += rtc-mcp795.o
obj-$(CONFIG_RTC_DRV_MOXART) += rtc-moxart.o
obj-$(CONFIG_RTC_DRV_MPC5121) += rtc-mpc5121.o
-obj-$(CONFIG_RTC_DRV_VRTC) += rtc-mrst.o
obj-$(CONFIG_RTC_DRV_MSM6242) += rtc-msm6242.o
obj-$(CONFIG_RTC_DRV_MT6397) += rtc-mt6397.o
obj-$(CONFIG_RTC_DRV_MT7622) += rtc-mt7622.o
@@ -116,8 +116,8 @@ obj-$(CONFIG_RTC_DRV_PCF2123) += rtc-pcf2123.o
obj-$(CONFIG_RTC_DRV_PCF2127) += rtc-pcf2127.o
obj-$(CONFIG_RTC_DRV_PCF50633) += rtc-pcf50633.o
obj-$(CONFIG_RTC_DRV_PCF85063) += rtc-pcf85063.o
-obj-$(CONFIG_RTC_DRV_PCF85363) += rtc-pcf85363.o
obj-$(CONFIG_RTC_DRV_PCF8523) += rtc-pcf8523.o
+obj-$(CONFIG_RTC_DRV_PCF85363) += rtc-pcf85363.o
obj-$(CONFIG_RTC_DRV_PCF8563) += rtc-pcf8563.o
obj-$(CONFIG_RTC_DRV_PCF8583) += rtc-pcf8583.o
obj-$(CONFIG_RTC_DRV_PIC32) += rtc-pic32.o
@@ -154,9 +154,9 @@ obj-$(CONFIG_RTC_DRV_SNVS) += rtc-snvs.o
obj-$(CONFIG_RTC_DRV_SPEAR) += rtc-spear.o
obj-$(CONFIG_RTC_DRV_STARFIRE) += rtc-starfire.o
obj-$(CONFIG_RTC_DRV_STK17TA8) += rtc-stk17ta8.o
+obj-$(CONFIG_RTC_DRV_ST_LPC) += rtc-st-lpc.o
obj-$(CONFIG_RTC_DRV_STM32) += rtc-stm32.o
obj-$(CONFIG_RTC_DRV_STMP) += rtc-stmp3xxx.o
-obj-$(CONFIG_RTC_DRV_ST_LPC) += rtc-st-lpc.o
obj-$(CONFIG_RTC_DRV_SUN4V) += rtc-sun4v.o
obj-$(CONFIG_RTC_DRV_SUN6I) += rtc-sun6i.o
obj-$(CONFIG_RTC_DRV_SUNXI) += rtc-sunxi.o
@@ -169,10 +169,10 @@ obj-$(CONFIG_RTC_DRV_TWL4030) += rtc-twl.o
obj-$(CONFIG_RTC_DRV_TX4939) += rtc-tx4939.o
obj-$(CONFIG_RTC_DRV_V3020) += rtc-v3020.o
obj-$(CONFIG_RTC_DRV_VR41XX) += rtc-vr41xx.o
+obj-$(CONFIG_RTC_DRV_VRTC) += rtc-mrst.o
obj-$(CONFIG_RTC_DRV_VT8500) += rtc-vt8500.o
obj-$(CONFIG_RTC_DRV_WM831X) += rtc-wm831x.o
obj-$(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/class.c b/drivers/rtc/class.c
index 0fca4d74c76b..3b43787f154b 100644
--- a/drivers/rtc/class.c
+++ b/drivers/rtc/class.c
@@ -286,9 +286,10 @@ static void rtc_device_get_offset(struct rtc_device *rtc)
*
* Returns the pointer to the new struct class device.
*/
-struct rtc_device *rtc_device_register(const char *name, struct device *dev,
- const struct rtc_class_ops *ops,
- struct module *owner)
+static struct rtc_device *rtc_device_register(const char *name,
+ struct device *dev,
+ const struct rtc_class_ops *ops,
+ struct module *owner)
{
struct rtc_device *rtc;
struct rtc_wkalrm alrm;
@@ -351,15 +352,13 @@ exit:
name, err);
return ERR_PTR(err);
}
-EXPORT_SYMBOL_GPL(rtc_device_register);
-
/**
* rtc_device_unregister - removes the previously registered RTC class device
*
* @rtc: the RTC class device to destroy
*/
-void rtc_device_unregister(struct rtc_device *rtc)
+static void rtc_device_unregister(struct rtc_device *rtc)
{
mutex_lock(&rtc->ops_lock);
/*
@@ -372,7 +371,6 @@ void rtc_device_unregister(struct rtc_device *rtc)
mutex_unlock(&rtc->ops_lock);
put_device(&rtc->dev);
}
-EXPORT_SYMBOL_GPL(rtc_device_unregister);
static void devm_rtc_device_release(struct device *dev, void *res)
{
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index 3d577e259e91..612a83d3ddcc 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -596,7 +596,6 @@ EXPORT_SYMBOL_GPL(rtc_update_irq_enable);
* This function is called when an AIE, UIE or PIE mode interrupt
* has occurred (or been emulated).
*
- * Triggers the registered irq_task function callback.
*/
void rtc_handle_legacy_irq(struct rtc_device *rtc, int num, int mode)
{
@@ -741,7 +740,6 @@ static int rtc_update_hrtimer(struct rtc_device *rtc, int enabled)
/**
* rtc_irq_set_state - enable/disable 2^N Hz periodic IRQs
* @rtc: the rtc device
- * @task: currently registered with rtc_irq_register()
* @enabled: true to enable periodic IRQs
* Context: any
*
@@ -764,7 +762,6 @@ int rtc_irq_set_state(struct rtc_device *rtc, int enabled)
/**
* rtc_irq_set_freq - set 2^N Hz periodic IRQ frequency for IRQ
* @rtc: the rtc device
- * @task: currently registered with rtc_irq_register()
* @freq: positive frequency
* Context: any
*
diff --git a/drivers/rtc/rtc-ab8500.c b/drivers/rtc/rtc-ab8500.c
index e28f4401fd35..1f0cbd51ba06 100644
--- a/drivers/rtc/rtc-ab8500.c
+++ b/drivers/rtc/rtc-ab8500.c
@@ -46,7 +46,6 @@
#define RTC_STATUS_DATA 0x01
#define COUNTS_PER_SEC (0xF000 / 60)
-#define AB8500_RTC_EPOCH 2000
static const u8 ab8500_rtc_time_regs[] = {
AB8500_RTC_WATCH_TMIN_HI_REG, AB8500_RTC_WATCH_TMIN_MID_REG,
@@ -59,23 +58,6 @@ static const u8 ab8500_rtc_alarm_regs[] = {
AB8500_RTC_ALRM_MIN_LOW_REG
};
-/* Calculate the seconds from 1970 to 01-01-2000 00:00:00 */
-static unsigned long get_elapsed_seconds(int year)
-{
- unsigned long secs;
- struct rtc_time tm = {
- .tm_year = year - 1900,
- .tm_mday = 1,
- };
-
- /*
- * This function calculates secs from 1970 and not from
- * 1900, even if we supply the offset from year 1900.
- */
- rtc_tm_to_time(&tm, &secs);
- return secs;
-}
-
static int ab8500_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
unsigned long timeout = jiffies + HZ;
@@ -118,9 +100,6 @@ static int ab8500_rtc_read_time(struct device *dev, struct rtc_time *tm)
secs = secs / COUNTS_PER_SEC;
secs = secs + (mins * 60);
- /* Add back the initially subtracted number of seconds */
- secs += get_elapsed_seconds(AB8500_RTC_EPOCH);
-
rtc_time_to_tm(secs, tm);
return 0;
}
@@ -131,21 +110,8 @@ static int ab8500_rtc_set_time(struct device *dev, struct rtc_time *tm)
unsigned char buf[ARRAY_SIZE(ab8500_rtc_time_regs)];
unsigned long no_secs, no_mins, secs = 0;
- if (tm->tm_year < (AB8500_RTC_EPOCH - 1900)) {
- dev_dbg(dev, "year should be equal to or greater than %d\n",
- AB8500_RTC_EPOCH);
- return -EINVAL;
- }
-
- /* Get the number of seconds since 1970 */
rtc_tm_to_time(tm, &secs);
- /*
- * Convert it to the number of seconds since 01-01-2000 00:00:00, since
- * we only have a small counter in the RTC.
- */
- secs -= get_elapsed_seconds(AB8500_RTC_EPOCH);
-
no_mins = secs / 60;
no_secs = secs % 60;
@@ -202,12 +168,9 @@ static int ab8500_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
mins = (buf[0] << 16) | (buf[1] << 8) | (buf[2]);
secs = mins * 60;
- /* Add back the initially subtracted number of seconds */
- secs += get_elapsed_seconds(AB8500_RTC_EPOCH);
-
rtc_time_to_tm(secs, &alarm->time);
- return rtc_valid_tm(&alarm->time);
+ return 0;
}
static int ab8500_rtc_irq_enable(struct device *dev, unsigned int enabled)
@@ -224,12 +187,6 @@ static int ab8500_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
unsigned long mins, secs = 0, cursec = 0;
struct rtc_time curtm;
- if (alarm->time.tm_year < (AB8500_RTC_EPOCH - 1900)) {
- dev_dbg(dev, "year should be equal to or greater than %d\n",
- AB8500_RTC_EPOCH);
- return -EINVAL;
- }
-
/* Get the number of seconds since 1970 */
rtc_tm_to_time(&alarm->time, &secs);
@@ -245,12 +202,6 @@ static int ab8500_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
return -EINVAL;
}
- /*
- * Convert it to the number of seconds since 01-01-2000 00:00:00, since
- * we only have a small counter in the RTC.
- */
- secs -= get_elapsed_seconds(AB8500_RTC_EPOCH);
-
mins = secs / 60;
buf[2] = mins & 0xFF;
@@ -360,15 +311,14 @@ static DEVICE_ATTR(rtc_calibration, S_IRUGO | S_IWUSR,
ab8500_sysfs_show_rtc_calibration,
ab8500_sysfs_store_rtc_calibration);
-static int ab8500_sysfs_rtc_register(struct device *dev)
-{
- return device_create_file(dev, &dev_attr_rtc_calibration);
-}
+static struct attribute *ab8500_rtc_attrs[] = {
+ &dev_attr_rtc_calibration.attr,
+ NULL
+};
-static void ab8500_sysfs_rtc_unregister(struct device *dev)
-{
- device_remove_file(dev, &dev_attr_rtc_calibration);
-}
+static const struct attribute_group ab8500_rtc_sysfs_files = {
+ .attrs = ab8500_rtc_attrs,
+};
static irqreturn_t rtc_alarm_handler(int irq, void *data)
{
@@ -429,14 +379,11 @@ static int ab8500_rtc_probe(struct platform_device *pdev)
device_init_wakeup(&pdev->dev, true);
- rtc = devm_rtc_device_register(&pdev->dev, "ab8500-rtc",
- (struct rtc_class_ops *)platid->driver_data,
- THIS_MODULE);
- if (IS_ERR(rtc)) {
- dev_err(&pdev->dev, "Registration failed\n");
- err = PTR_ERR(rtc);
- return err;
- }
+ rtc = devm_rtc_allocate_device(&pdev->dev);
+ if (IS_ERR(rtc))
+ return PTR_ERR(rtc);
+
+ rtc->ops = (struct rtc_class_ops *)platid->driver_data;
err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
rtc_alarm_handler, IRQF_ONESHOT,
@@ -447,22 +394,23 @@ static int ab8500_rtc_probe(struct platform_device *pdev)
dev_pm_set_wake_irq(&pdev->dev, irq);
platform_set_drvdata(pdev, rtc);
- err = ab8500_sysfs_rtc_register(&pdev->dev);
- if (err) {
- dev_err(&pdev->dev, "sysfs RTC failed to register\n");
- return err;
- }
-
rtc->uie_unsupported = 1;
- return 0;
+ rtc->range_max = (1ULL << 24) * 60 - 1; // 24-bit minutes + 59 secs
+ rtc->start_secs = RTC_TIMESTAMP_BEGIN_2000;
+ rtc->set_start_time = true;
+
+ err = rtc_add_group(rtc, &ab8500_rtc_sysfs_files);
+ if (err)
+ return err;
+
+ return rtc_register_device(rtc);
}
static int ab8500_rtc_remove(struct platform_device *pdev)
{
dev_pm_clear_wake_irq(&pdev->dev);
device_init_wakeup(&pdev->dev, false);
- ab8500_sysfs_rtc_unregister(&pdev->dev);
return 0;
}
diff --git a/drivers/rtc/rtc-abx80x.c b/drivers/rtc/rtc-abx80x.c
index 2cefa67a1132..d8e94edcb0ba 100644
--- a/drivers/rtc/rtc-abx80x.c
+++ b/drivers/rtc/rtc-abx80x.c
@@ -17,6 +17,7 @@
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/rtc.h>
+#include <linux/watchdog.h>
#define ABX8XX_REG_HTH 0x00
#define ABX8XX_REG_SC 0x01
@@ -37,6 +38,7 @@
#define ABX8XX_REG_STATUS 0x0f
#define ABX8XX_STATUS_AF BIT(2)
+#define ABX8XX_STATUS_WDT BIT(6)
#define ABX8XX_REG_CTRL1 0x10
#define ABX8XX_CTRL_WRITE BIT(0)
@@ -61,6 +63,14 @@
#define ABX8XX_OSS_OF BIT(1)
#define ABX8XX_OSS_OMODE BIT(4)
+#define ABX8XX_REG_WDT 0x1b
+#define ABX8XX_WDT_WDS BIT(7)
+#define ABX8XX_WDT_BMB_MASK 0x7c
+#define ABX8XX_WDT_BMB_SHIFT 2
+#define ABX8XX_WDT_MAX_TIME (ABX8XX_WDT_BMB_MASK >> ABX8XX_WDT_BMB_SHIFT)
+#define ABX8XX_WDT_WRB_MASK 0x03
+#define ABX8XX_WDT_WRB_1HZ 0x02
+
#define ABX8XX_REG_CFG_KEY 0x1f
#define ABX8XX_CFG_KEY_OSC 0xa1
#define ABX8XX_CFG_KEY_MISC 0x9d
@@ -80,20 +90,27 @@ enum abx80x_chip {AB0801, AB0803, AB0804, AB0805,
struct abx80x_cap {
u16 pn;
bool has_tc;
+ bool has_wdog;
};
static struct abx80x_cap abx80x_caps[] = {
[AB0801] = {.pn = 0x0801},
[AB0803] = {.pn = 0x0803},
- [AB0804] = {.pn = 0x0804, .has_tc = true},
- [AB0805] = {.pn = 0x0805, .has_tc = true},
+ [AB0804] = {.pn = 0x0804, .has_tc = true, .has_wdog = true},
+ [AB0805] = {.pn = 0x0805, .has_tc = true, .has_wdog = true},
[AB1801] = {.pn = 0x1801},
[AB1803] = {.pn = 0x1803},
- [AB1804] = {.pn = 0x1804, .has_tc = true},
- [AB1805] = {.pn = 0x1805, .has_tc = true},
+ [AB1804] = {.pn = 0x1804, .has_tc = true, .has_wdog = true},
+ [AB1805] = {.pn = 0x1805, .has_tc = true, .has_wdog = true},
[ABX80X] = {.pn = 0}
};
+struct abx80x_priv {
+ struct rtc_device *rtc;
+ struct i2c_client *client;
+ struct watchdog_device wdog;
+};
+
static int abx80x_is_rc_mode(struct i2c_client *client)
{
int flags = 0;
@@ -218,7 +235,8 @@ static int abx80x_rtc_set_time(struct device *dev, struct rtc_time *tm)
static irqreturn_t abx80x_handle_irq(int irq, void *dev_id)
{
struct i2c_client *client = dev_id;
- struct rtc_device *rtc = i2c_get_clientdata(client);
+ struct abx80x_priv *priv = i2c_get_clientdata(client);
+ struct rtc_device *rtc = priv->rtc;
int status;
status = i2c_smbus_read_byte_data(client, ABX8XX_REG_STATUS);
@@ -228,6 +246,13 @@ static irqreturn_t abx80x_handle_irq(int irq, void *dev_id)
if (status & ABX8XX_STATUS_AF)
rtc_update_irq(rtc, 1, RTC_AF | RTC_IRQF);
+ /*
+ * It is unclear if we'll get an interrupt before the external
+ * reset kicks in.
+ */
+ if (status & ABX8XX_STATUS_WDT)
+ dev_alert(&client->dev, "watchdog timeout interrupt.\n");
+
i2c_smbus_write_byte_data(client, ABX8XX_REG_STATUS, 0);
return IRQ_HANDLED;
@@ -529,11 +554,94 @@ static void rtc_calib_remove_sysfs_group(void *_dev)
sysfs_remove_group(&dev->kobj, &rtc_calib_attr_group);
}
+#ifdef CONFIG_WATCHDOG
+
+static inline u8 timeout_bits(unsigned int timeout)
+{
+ return ((timeout << ABX8XX_WDT_BMB_SHIFT) & ABX8XX_WDT_BMB_MASK) |
+ ABX8XX_WDT_WRB_1HZ;
+}
+
+static int __abx80x_wdog_set_timeout(struct watchdog_device *wdog,
+ unsigned int timeout)
+{
+ struct abx80x_priv *priv = watchdog_get_drvdata(wdog);
+ u8 val = ABX8XX_WDT_WDS | timeout_bits(timeout);
+
+ /*
+ * Writing any timeout to the WDT register resets the watchdog timer.
+ * Writing 0 disables it.
+ */
+ return i2c_smbus_write_byte_data(priv->client, ABX8XX_REG_WDT, val);
+}
+
+static int abx80x_wdog_set_timeout(struct watchdog_device *wdog,
+ unsigned int new_timeout)
+{
+ int err = 0;
+
+ if (watchdog_hw_running(wdog))
+ err = __abx80x_wdog_set_timeout(wdog, new_timeout);
+
+ if (err == 0)
+ wdog->timeout = new_timeout;
+
+ return err;
+}
+
+static int abx80x_wdog_ping(struct watchdog_device *wdog)
+{
+ return __abx80x_wdog_set_timeout(wdog, wdog->timeout);
+}
+
+static int abx80x_wdog_start(struct watchdog_device *wdog)
+{
+ return __abx80x_wdog_set_timeout(wdog, wdog->timeout);
+}
+
+static int abx80x_wdog_stop(struct watchdog_device *wdog)
+{
+ return __abx80x_wdog_set_timeout(wdog, 0);
+}
+
+static const struct watchdog_info abx80x_wdog_info = {
+ .identity = "abx80x watchdog",
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+};
+
+static const struct watchdog_ops abx80x_wdog_ops = {
+ .owner = THIS_MODULE,
+ .start = abx80x_wdog_start,
+ .stop = abx80x_wdog_stop,
+ .ping = abx80x_wdog_ping,
+ .set_timeout = abx80x_wdog_set_timeout,
+};
+
+static int abx80x_setup_watchdog(struct abx80x_priv *priv)
+{
+ priv->wdog.parent = &priv->client->dev;
+ priv->wdog.ops = &abx80x_wdog_ops;
+ priv->wdog.info = &abx80x_wdog_info;
+ priv->wdog.min_timeout = 1;
+ priv->wdog.max_timeout = ABX8XX_WDT_MAX_TIME;
+ priv->wdog.timeout = ABX8XX_WDT_MAX_TIME;
+
+ watchdog_set_drvdata(&priv->wdog, priv);
+
+ return devm_watchdog_register_device(&priv->client->dev, &priv->wdog);
+}
+#else
+static int abx80x_setup_watchdog(struct abx80x_priv *priv)
+{
+ return 0;
+}
+#endif
+
static int abx80x_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device_node *np = client->dev.of_node;
- struct rtc_device *rtc;
+ struct abx80x_priv *priv;
int i, data, err, trickle_cfg = -EINVAL;
char buf[7];
unsigned int part = id->driver_data;
@@ -610,13 +718,24 @@ static int abx80x_probe(struct i2c_client *client,
if (err)
return err;
- rtc = devm_rtc_allocate_device(&client->dev);
- if (IS_ERR(rtc))
- return PTR_ERR(rtc);
+ priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
+ if (priv == NULL)
+ return -ENOMEM;
+
+ priv->rtc = devm_rtc_allocate_device(&client->dev);
+ if (IS_ERR(priv->rtc))
+ return PTR_ERR(priv->rtc);
+
+ priv->rtc->ops = &abx80x_rtc_ops;
+ priv->client = client;
- rtc->ops = &abx80x_rtc_ops;
+ i2c_set_clientdata(client, priv);
- i2c_set_clientdata(client, rtc);
+ if (abx80x_caps[part].has_wdog) {
+ err = abx80x_setup_watchdog(priv);
+ if (err)
+ return err;
+ }
if (client->irq > 0) {
dev_info(&client->dev, "IRQ %d supplied\n", client->irq);
@@ -649,7 +768,7 @@ static int abx80x_probe(struct i2c_client *client,
return err;
}
- err = rtc_register_device(rtc);
+ err = rtc_register_device(priv->rtc);
return err;
}
diff --git a/drivers/rtc/rtc-armada38x.c b/drivers/rtc/rtc-armada38x.c
index bde53c8ccee2..9e78f004670b 100644
--- a/drivers/rtc/rtc-armada38x.c
+++ b/drivers/rtc/rtc-armada38x.c
@@ -224,7 +224,7 @@ static int armada38x_rtc_read_time(struct device *dev, struct rtc_time *tm)
time = rtc->data->read_rtc_reg(rtc, RTC_TIME);
spin_unlock_irqrestore(&rtc->lock, flags);
- rtc_time_to_tm(time, tm);
+ rtc_time64_to_tm(time, tm);
return 0;
}
@@ -249,13 +249,9 @@ static void armada38x_rtc_reset(struct armada38x_rtc *rtc)
static int armada38x_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
struct armada38x_rtc *rtc = dev_get_drvdata(dev);
- int ret = 0;
unsigned long time, flags;
- ret = rtc_tm_to_time(tm, &time);
-
- if (ret)
- goto out;
+ time = rtc_tm_to_time64(tm);
if (!rtc->initialized)
armada38x_rtc_reset(rtc);
@@ -264,8 +260,7 @@ static int armada38x_rtc_set_time(struct device *dev, struct rtc_time *tm)
rtc_delayed_write(time, rtc, RTC_TIME);
spin_unlock_irqrestore(&rtc->lock, flags);
-out:
- return ret;
+ return 0;
}
static int armada38x_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
@@ -284,7 +279,7 @@ static int armada38x_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
spin_unlock_irqrestore(&rtc->lock, flags);
alrm->enabled = val ? 1 : 0;
- rtc_time_to_tm(time, &alrm->time);
+ rtc_time64_to_tm(time, &alrm->time);
return 0;
}
@@ -295,12 +290,8 @@ static int armada38x_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
u32 reg = ALARM_REG(RTC_ALARM1, rtc->data->alarm);
u32 reg_irq = ALARM_REG(RTC_IRQ1_CONF, rtc->data->alarm);
unsigned long time, flags;
- int ret = 0;
- ret = rtc_tm_to_time(&alrm->time, &time);
-
- if (ret)
- goto out;
+ time = rtc_tm_to_time64(&alrm->time);
spin_lock_irqsave(&rtc->lock, flags);
@@ -313,8 +304,7 @@ static int armada38x_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
spin_unlock_irqrestore(&rtc->lock, flags);
-out:
- return ret;
+ return 0;
}
static int armada38x_rtc_alarm_irq_enable(struct device *dev,
@@ -514,7 +504,6 @@ MODULE_DEVICE_TABLE(of, armada38x_rtc_of_match_table);
static __init int armada38x_rtc_probe(struct platform_device *pdev)
{
- const struct rtc_class_ops *ops;
struct resource *res;
struct armada38x_rtc *rtc;
const struct of_device_id *match;
@@ -551,6 +540,11 @@ static __init int armada38x_rtc_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "no irq\n");
return rtc->irq;
}
+
+ rtc->rtc_dev = devm_rtc_allocate_device(&pdev->dev);
+ if (IS_ERR(rtc->rtc_dev))
+ return PTR_ERR(rtc->rtc_dev);
+
if (devm_request_irq(&pdev->dev, rtc->irq, armada38x_rtc_alarm_irq,
0, pdev->name, rtc) < 0) {
dev_warn(&pdev->dev, "Interrupt not available.\n");
@@ -560,28 +554,26 @@ static __init int armada38x_rtc_probe(struct platform_device *pdev)
if (rtc->irq != -1) {
device_init_wakeup(&pdev->dev, 1);
- ops = &armada38x_rtc_ops;
+ rtc->rtc_dev->ops = &armada38x_rtc_ops;
} else {
/*
* If there is no interrupt available then we can't
* use the alarm
*/
- ops = &armada38x_rtc_ops_noirq;
+ rtc->rtc_dev->ops = &armada38x_rtc_ops_noirq;
}
rtc->data = (struct armada38x_rtc_data *)match->data;
-
/* Update RTC-MBUS bridge timing parameters */
rtc->data->update_mbus_timing(rtc);
- rtc->rtc_dev = devm_rtc_device_register(&pdev->dev, pdev->name,
- ops, THIS_MODULE);
- if (IS_ERR(rtc->rtc_dev)) {
- ret = PTR_ERR(rtc->rtc_dev);
+ rtc->rtc_dev->range_max = U32_MAX;
+
+ ret = rtc_register_device(rtc->rtc_dev);
+ if (ret)
dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret);
- return ret;
- }
- return 0;
+
+ return ret;
}
#ifdef CONFIG_PM_SLEEP
diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index cd3a2411bc2f..df0c5776d49b 100644
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c
@@ -50,6 +50,7 @@
/* this is for "generic access to PC-style RTC" using CMOS_READ/CMOS_WRITE */
#include <linux/mc146818rtc.h>
+#ifdef CONFIG_ACPI
/*
* Use ACPI SCI to replace HPET interrupt for RTC Alarm event
*
@@ -61,6 +62,18 @@
static bool use_acpi_alarm;
module_param(use_acpi_alarm, bool, 0444);
+static inline int cmos_use_acpi_alarm(void)
+{
+ return use_acpi_alarm;
+}
+#else /* !CONFIG_ACPI */
+
+static inline int cmos_use_acpi_alarm(void)
+{
+ return 0;
+}
+#endif
+
struct cmos_rtc {
struct rtc_device *rtc;
struct device *dev;
@@ -167,9 +180,9 @@ static inline int hpet_unregister_irq_handler(irq_handler_t handler)
#endif
/* Don't use HPET for RTC Alarm event if ACPI Fixed event is used */
-static int use_hpet_alarm(void)
+static inline int use_hpet_alarm(void)
{
- return is_hpet_enabled() && !use_acpi_alarm;
+ return is_hpet_enabled() && !cmos_use_acpi_alarm();
}
/*----------------------------------------------------------------*/
@@ -340,7 +353,7 @@ static void cmos_irq_enable(struct cmos_rtc *cmos, unsigned char mask)
if (use_hpet_alarm())
hpet_set_rtc_irq_bit(mask);
- if ((mask & RTC_AIE) && use_acpi_alarm) {
+ if ((mask & RTC_AIE) && cmos_use_acpi_alarm()) {
if (cmos->wake_on)
cmos->wake_on(cmos->dev);
}
@@ -358,7 +371,7 @@ static void cmos_irq_disable(struct cmos_rtc *cmos, unsigned char mask)
if (use_hpet_alarm())
hpet_mask_rtc_irq_bit(mask);
- if ((mask & RTC_AIE) && use_acpi_alarm) {
+ if ((mask & RTC_AIE) && cmos_use_acpi_alarm()) {
if (cmos->wake_off)
cmos->wake_off(cmos->dev);
}
@@ -980,7 +993,7 @@ static int cmos_suspend(struct device *dev)
}
spin_unlock_irq(&rtc_lock);
- if ((tmp & RTC_AIE) && !use_acpi_alarm) {
+ if ((tmp & RTC_AIE) && !cmos_use_acpi_alarm()) {
cmos->enabled_wake = 1;
if (cmos->wake_on)
cmos->wake_on(dev);
@@ -1031,7 +1044,7 @@ static void cmos_check_wkalrm(struct device *dev)
* ACPI RTC wake event is cleared after resume from STR,
* ACK the rtc irq here
*/
- if (t_now >= cmos->alarm_expires && use_acpi_alarm) {
+ if (t_now >= cmos->alarm_expires && cmos_use_acpi_alarm()) {
cmos_interrupt(0, (void *)cmos->rtc);
return;
}
@@ -1053,7 +1066,7 @@ static int __maybe_unused cmos_resume(struct device *dev)
struct cmos_rtc *cmos = dev_get_drvdata(dev);
unsigned char tmp;
- if (cmos->enabled_wake && !use_acpi_alarm) {
+ if (cmos->enabled_wake && !cmos_use_acpi_alarm()) {
if (cmos->wake_off)
cmos->wake_off(dev);
else
@@ -1132,7 +1145,7 @@ static u32 rtc_handler(void *context)
* Or else, ACPI SCI is enabled during suspend/resume only,
* update rtc irq in that case.
*/
- if (use_acpi_alarm)
+ if (cmos_use_acpi_alarm())
cmos_interrupt(0, (void *)cmos->rtc);
else {
/* Fix me: can we use cmos_interrupt() here as well? */
diff --git a/drivers/rtc/rtc-core.h b/drivers/rtc/rtc-core.h
index ccc17a2e293d..0abf98983e13 100644
--- a/drivers/rtc/rtc-core.h
+++ b/drivers/rtc/rtc-core.h
@@ -40,23 +40,9 @@ static inline void rtc_proc_del_device(struct rtc_device *rtc)
#ifdef CONFIG_RTC_INTF_SYSFS
const struct attribute_group **rtc_get_dev_attribute_groups(void);
-int rtc_add_group(struct rtc_device *rtc, const struct attribute_group *grp);
-int rtc_add_groups(struct rtc_device *rtc, const struct attribute_group **grps);
#else
static inline const struct attribute_group **rtc_get_dev_attribute_groups(void)
{
return NULL;
}
-
-static inline
-int rtc_add_group(struct rtc_device *rtc, const struct attribute_group *grp)
-{
- return 0;
-}
-
-static inline
-int rtc_add_groups(struct rtc_device *rtc, const struct attribute_group **grps)
-{
- return 0;
-}
#endif
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index 4b2b4627daeb..74b31dce484f 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -114,6 +114,20 @@ enum ds_type {
# define RX8025_BIT_VDET 0x40
# define RX8025_BIT_XST 0x20
+#define M41TXX_REG_CONTROL 0x07
+# define M41TXX_BIT_OUT BIT(7)
+# define M41TXX_BIT_FT BIT(6)
+# define M41TXX_BIT_CALIB_SIGN BIT(5)
+# define M41TXX_M_CALIBRATION GENMASK(4, 0)
+
+/* negative offset step is -2.034ppm */
+#define M41TXX_NEG_OFFSET_STEP_PPB 2034
+/* positive offset step is +4.068ppm */
+#define M41TXX_POS_OFFSET_STEP_PPB 4068
+/* Min and max values supported with 'offset' interface by M41TXX */
+#define M41TXX_MIN_OFFSET ((-31) * M41TXX_NEG_OFFSET_STEP_PPB)
+#define M41TXX_MAX_OFFSET ((31) * M41TXX_POS_OFFSET_STEP_PPB)
+
struct ds1307 {
enum ds_type type;
unsigned long flags;
@@ -146,6 +160,9 @@ struct chip_desc {
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 int ds1337_read_alarm(struct device *dev, struct rtc_wkalrm *t);
+static int ds1337_set_alarm(struct device *dev, struct rtc_wkalrm *t);
+static int ds1307_alarm_irq_enable(struct device *dev, unsigned int enabled);
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);
@@ -155,6 +172,8 @@ 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 int m41txx_rtc_read_offset(struct device *dev, long *offset);
+static int m41txx_rtc_set_offset(struct device *dev, long offset);
static const struct rtc_class_ops rx8130_rtc_ops = {
.read_time = ds1307_get_time,
@@ -172,6 +191,16 @@ static const struct rtc_class_ops mcp794xx_rtc_ops = {
.alarm_irq_enable = mcp794xx_alarm_irq_enable,
};
+static const struct rtc_class_ops m41txx_rtc_ops = {
+ .read_time = ds1307_get_time,
+ .set_time = ds1307_set_time,
+ .read_alarm = ds1337_read_alarm,
+ .set_alarm = ds1337_set_alarm,
+ .alarm_irq_enable = ds1307_alarm_irq_enable,
+ .read_offset = m41txx_rtc_read_offset,
+ .set_offset = m41txx_rtc_set_offset,
+};
+
static const struct chip_desc chips[last_ds_type] = {
[ds_1307] = {
.nvram_offset = 8,
@@ -228,10 +257,17 @@ static const struct chip_desc chips[last_ds_type] = {
.irq_handler = rx8130_irq,
.rtc_ops = &rx8130_rtc_ops,
},
+ [m41t0] = {
+ .rtc_ops = &m41txx_rtc_ops,
+ },
+ [m41t00] = {
+ .rtc_ops = &m41txx_rtc_ops,
+ },
[m41t11] = {
/* this is battery backed SRAM */
.nvram_offset = 8,
.nvram_size = 56,
+ .rtc_ops = &m41txx_rtc_ops,
},
[mcp794xx] = {
.alarm = 1,
@@ -973,6 +1009,110 @@ static int mcp794xx_alarm_irq_enable(struct device *dev, unsigned int enabled)
enabled ? MCP794XX_BIT_ALM0_EN : 0);
}
+static int m41txx_rtc_read_offset(struct device *dev, long *offset)
+{
+ struct ds1307 *ds1307 = dev_get_drvdata(dev);
+ unsigned int ctrl_reg;
+ u8 val;
+
+ regmap_read(ds1307->regmap, M41TXX_REG_CONTROL, &ctrl_reg);
+
+ val = ctrl_reg & M41TXX_M_CALIBRATION;
+
+ /* check if positive */
+ if (ctrl_reg & M41TXX_BIT_CALIB_SIGN)
+ *offset = (val * M41TXX_POS_OFFSET_STEP_PPB);
+ else
+ *offset = -(val * M41TXX_NEG_OFFSET_STEP_PPB);
+
+ return 0;
+}
+
+static int m41txx_rtc_set_offset(struct device *dev, long offset)
+{
+ struct ds1307 *ds1307 = dev_get_drvdata(dev);
+ unsigned int ctrl_reg;
+
+ if ((offset < M41TXX_MIN_OFFSET) || (offset > M41TXX_MAX_OFFSET))
+ return -ERANGE;
+
+ if (offset >= 0) {
+ ctrl_reg = DIV_ROUND_CLOSEST(offset,
+ M41TXX_POS_OFFSET_STEP_PPB);
+ ctrl_reg |= M41TXX_BIT_CALIB_SIGN;
+ } else {
+ ctrl_reg = DIV_ROUND_CLOSEST(abs(offset),
+ M41TXX_NEG_OFFSET_STEP_PPB);
+ }
+
+ return regmap_update_bits(ds1307->regmap, M41TXX_REG_CONTROL,
+ M41TXX_M_CALIBRATION | M41TXX_BIT_CALIB_SIGN,
+ ctrl_reg);
+}
+
+static ssize_t frequency_test_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ds1307 *ds1307 = dev_get_drvdata(dev->parent);
+ bool freq_test_en;
+ int ret;
+
+ ret = kstrtobool(buf, &freq_test_en);
+ if (ret) {
+ dev_err(dev, "Failed to store RTC Frequency Test attribute\n");
+ return ret;
+ }
+
+ regmap_update_bits(ds1307->regmap, M41TXX_REG_CONTROL, M41TXX_BIT_FT,
+ freq_test_en ? M41TXX_BIT_FT : 0);
+
+ return count;
+}
+
+static ssize_t frequency_test_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ds1307 *ds1307 = dev_get_drvdata(dev->parent);
+ unsigned int ctrl_reg;
+
+ regmap_read(ds1307->regmap, M41TXX_REG_CONTROL, &ctrl_reg);
+
+ return scnprintf(buf, PAGE_SIZE, (ctrl_reg & M41TXX_BIT_FT) ? "on\n" :
+ "off\n");
+}
+
+static DEVICE_ATTR_RW(frequency_test);
+
+static struct attribute *rtc_freq_test_attrs[] = {
+ &dev_attr_frequency_test.attr,
+ NULL,
+};
+
+static const struct attribute_group rtc_freq_test_attr_group = {
+ .attrs = rtc_freq_test_attrs,
+};
+
+static int ds1307_add_frequency_test(struct ds1307 *ds1307)
+{
+ int err;
+
+ switch (ds1307->type) {
+ case m41t0:
+ case m41t00:
+ case m41t11:
+ err = rtc_add_group(ds1307->rtc, &rtc_freq_test_attr_group);
+ if (err)
+ return err;
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
/*----------------------------------------------------------------------*/
static int ds1307_nvram_read(void *priv, unsigned int offset, void *val,
@@ -1384,7 +1524,6 @@ static void ds1307_clks_register(struct ds1307 *ds1307)
static const struct regmap_config regmap_config = {
.reg_bits = 8,
.val_bits = 8,
- .max_register = 0x9,
};
static int ds1307_probe(struct i2c_client *client,
@@ -1711,6 +1850,10 @@ read_rtc:
}
ds1307->rtc->ops = chip->rtc_ops ?: &ds13xx_rtc_ops;
+ err = ds1307_add_frequency_test(ds1307);
+ if (err)
+ return err;
+
err = rtc_register_device(ds1307->rtc);
if (err)
return err;
diff --git a/drivers/rtc/rtc-ds1685.c b/drivers/rtc/rtc-ds1685.c
index 6f39f683a98c..2710f2594c42 100644
--- a/drivers/rtc/rtc-ds1685.c
+++ b/drivers/rtc/rtc-ds1685.c
@@ -770,33 +770,6 @@ static const char *ds1685_rtc_sqw_freq[16] = {
"512Hz", "256Hz", "128Hz", "64Hz", "32Hz", "16Hz", "8Hz", "4Hz", "2Hz"
};
-#ifdef CONFIG_RTC_DS1685_PROC_REGS
-/**
- * ds1685_rtc_print_regs - helper function to print register values.
- * @hex: hex byte to convert into binary bits.
- * @dest: destination char array.
- *
- * This is basically a hex->binary function, just with extra spacing between
- * the digits. It only works on 1-byte values (8 bits).
- */
-static char*
-ds1685_rtc_print_regs(u8 hex, char *dest)
-{
- u32 i, j;
- char *tmp = dest;
-
- for (i = 0; i < NUM_BITS; i++) {
- *tmp++ = ((hex & 0x80) != 0 ? '1' : '0');
- for (j = 0; j < NUM_SPACES; j++)
- *tmp++ = ' ';
- hex <<= 1;
- }
- *tmp++ = '\0';
-
- return dest;
-}
-#endif
-
/**
* ds1685_rtc_proc - procfs access function.
* @dev: pointer to device structure.
@@ -805,13 +778,9 @@ ds1685_rtc_print_regs(u8 hex, char *dest)
static int
ds1685_rtc_proc(struct device *dev, struct seq_file *seq)
{
- struct platform_device *pdev = to_platform_device(dev);
- struct ds1685_priv *rtc = platform_get_drvdata(pdev);
+ struct ds1685_priv *rtc = dev_get_drvdata(dev);
u8 ctrla, ctrlb, ctrlc, ctrld, ctrl4a, ctrl4b, ssn[8];
char *model;
-#ifdef CONFIG_RTC_DS1685_PROC_REGS
- char bits[NUM_REGS][(NUM_BITS * NUM_SPACES) + NUM_BITS + 1];
-#endif
/* Read all the relevant data from the control registers. */
ds1685_rtc_switch_to_bank1(rtc);
@@ -859,28 +828,7 @@ ds1685_rtc_proc(struct device *dev, struct seq_file *seq)
"Periodic IRQ\t: %s\n"
"Periodic Rate\t: %s\n"
"SQW Freq\t: %s\n"
-#ifdef CONFIG_RTC_DS1685_PROC_REGS
- "Serial #\t: %8phC\n"
- "Register Status\t:\n"
- " Ctrl A\t: UIP DV2 DV1 DV0 RS3 RS2 RS1 RS0\n"
- "\t\t: %s\n"
- " Ctrl B\t: SET PIE AIE UIE SQWE DM 2412 DSE\n"
- "\t\t: %s\n"
- " Ctrl C\t: IRQF PF AF UF --- --- --- ---\n"
- "\t\t: %s\n"
- " Ctrl D\t: VRT --- --- --- --- --- --- ---\n"
- "\t\t: %s\n"
-#if !defined(CONFIG_RTC_DRV_DS1685) && !defined(CONFIG_RTC_DRV_DS1689)
- " Ctrl 4A\t: VRT2 INCR BME --- PAB RF WF KF\n"
-#else
- " Ctrl 4A\t: VRT2 INCR --- --- PAB RF WF KF\n"
-#endif
- "\t\t: %s\n"
- " Ctrl 4B\t: ABE E32k CS RCE PRS RIE WIE KSE\n"
- "\t\t: %s\n",
-#else
"Serial #\t: %8phC\n",
-#endif
model,
((ctrla & RTC_CTRL_A_DV1) ? "enabled" : "disabled"),
((ctrlb & RTC_CTRL_B_2412) ? "24-hour" : "12-hour"),
@@ -894,17 +842,7 @@ ds1685_rtc_proc(struct device *dev, struct seq_file *seq)
ds1685_rtc_pirq_rate[(ctrla & RTC_CTRL_A_RS_MASK)] : "none"),
(!((ctrl4b & RTC_CTRL_4B_E32K)) ?
ds1685_rtc_sqw_freq[(ctrla & RTC_CTRL_A_RS_MASK)] : "32768Hz"),
-#ifdef CONFIG_RTC_DS1685_PROC_REGS
- ssn,
- ds1685_rtc_print_regs(ctrla, bits[0]),
- ds1685_rtc_print_regs(ctrlb, bits[1]),
- ds1685_rtc_print_regs(ctrlc, bits[2]),
- ds1685_rtc_print_regs(ctrld, bits[3]),
- ds1685_rtc_print_regs(ctrl4a, bits[4]),
- ds1685_rtc_print_regs(ctrl4b, bits[5]));
-#else
ssn);
-#endif
return 0;
}
#else
@@ -927,30 +865,13 @@ ds1685_rtc_ops = {
};
/* ----------------------------------------------------------------------- */
-
-/* ----------------------------------------------------------------------- */
-/* SysFS interface */
-
-#ifdef CONFIG_SYSFS
-/**
- * ds1685_rtc_sysfs_nvram_read - reads rtc nvram via sysfs.
- * @file: pointer to file structure.
- * @kobj: pointer to kobject structure.
- * @bin_attr: pointer to bin_attribute structure.
- * @buf: pointer to char array to hold the output.
- * @pos: current file position pointer.
- * @size: size of the data to read.
- */
-static ssize_t
-ds1685_rtc_sysfs_nvram_read(struct file *filp, struct kobject *kobj,
- struct bin_attribute *bin_attr, char *buf,
- loff_t pos, size_t size)
+static int ds1685_nvram_read(void *priv, unsigned int pos, void *val,
+ size_t size)
{
- struct platform_device *pdev =
- to_platform_device(container_of(kobj, struct device, kobj));
- struct ds1685_priv *rtc = platform_get_drvdata(pdev);
+ struct ds1685_priv *rtc = priv;
ssize_t count;
unsigned long flags = 0;
+ u8 *buf = val;
spin_lock_irqsave(&rtc->lock, flags);
ds1685_rtc_switch_to_bank0(rtc);
@@ -1004,33 +925,16 @@ ds1685_rtc_sysfs_nvram_read(struct file *filp, struct kobject *kobj,
#endif /* !CONFIG_RTC_DRV_DS1689 */
spin_unlock_irqrestore(&rtc->lock, flags);
- /*
- * XXX: Bug? this appears to cause the function to get executed
- * several times in succession. But it's the only way to actually get
- * data written out to a file.
- */
- return count;
+ return 0;
}
-/**
- * ds1685_rtc_sysfs_nvram_write - writes rtc nvram via sysfs.
- * @file: pointer to file structure.
- * @kobj: pointer to kobject structure.
- * @bin_attr: pointer to bin_attribute structure.
- * @buf: pointer to char array to hold the input.
- * @pos: current file position pointer.
- * @size: size of the data to write.
- */
-static ssize_t
-ds1685_rtc_sysfs_nvram_write(struct file *filp, struct kobject *kobj,
- struct bin_attribute *bin_attr, char *buf,
- loff_t pos, size_t size)
+static int ds1685_nvram_write(void *priv, unsigned int pos, void *val,
+ size_t size)
{
- struct platform_device *pdev =
- to_platform_device(container_of(kobj, struct device, kobj));
- struct ds1685_priv *rtc = platform_get_drvdata(pdev);
+ struct ds1685_priv *rtc = priv;
ssize_t count;
unsigned long flags = 0;
+ u8 *buf = val;
spin_lock_irqsave(&rtc->lock, flags);
ds1685_rtc_switch_to_bank0(rtc);
@@ -1084,26 +988,11 @@ ds1685_rtc_sysfs_nvram_write(struct file *filp, struct kobject *kobj,
#endif /* !CONFIG_RTC_DRV_DS1689 */
spin_unlock_irqrestore(&rtc->lock, flags);
- return count;
+ return 0;
}
-/**
- * struct ds1685_rtc_sysfs_nvram_attr - sysfs attributes for rtc nvram.
- * @attr: nvram attributes.
- * @read: nvram read function.
- * @write: nvram write function.
- * @size: nvram total size (bank0 + extended).
- */
-static struct bin_attribute
-ds1685_rtc_sysfs_nvram_attr = {
- .attr = {
- .name = "nvram",
- .mode = S_IRUGO | S_IWUSR,
- },
- .read = ds1685_rtc_sysfs_nvram_read,
- .write = ds1685_rtc_sysfs_nvram_write,
- .size = NVRAM_TOTAL_SZ
-};
+/* ----------------------------------------------------------------------- */
+/* SysFS interface */
/**
* ds1685_rtc_sysfs_battery_show - sysfs file for main battery status.
@@ -1188,43 +1077,6 @@ ds1685_rtc_sysfs_misc_grp = {
.attrs = ds1685_rtc_sysfs_misc_attrs,
};
-/**
- * ds1685_rtc_sysfs_register - register sysfs files.
- * @dev: pointer to device structure.
- */
-static int
-ds1685_rtc_sysfs_register(struct device *dev)
-{
- int ret = 0;
-
- sysfs_bin_attr_init(&ds1685_rtc_sysfs_nvram_attr);
- ret = sysfs_create_bin_file(&dev->kobj, &ds1685_rtc_sysfs_nvram_attr);
- if (ret)
- return ret;
-
- ret = sysfs_create_group(&dev->kobj, &ds1685_rtc_sysfs_misc_grp);
- if (ret)
- return ret;
-
- return 0;
-}
-
-/**
- * ds1685_rtc_sysfs_unregister - unregister sysfs files.
- * @dev: pointer to device structure.
- */
-static int
-ds1685_rtc_sysfs_unregister(struct device *dev)
-{
- sysfs_remove_bin_file(&dev->kobj, &ds1685_rtc_sysfs_nvram_attr);
- sysfs_remove_group(&dev->kobj, &ds1685_rtc_sysfs_misc_grp);
-
- return 0;
-}
-#endif /* CONFIG_SYSFS */
-
-
-
/* ----------------------------------------------------------------------- */
/* Driver Probe/Removal */
@@ -1242,6 +1094,12 @@ ds1685_rtc_probe(struct platform_device *pdev)
u8 ctrla, ctrlb, hours;
unsigned char am_pm;
int ret = 0;
+ struct nvmem_config nvmem_cfg = {
+ .name = "ds1685_nvram",
+ .size = NVRAM_TOTAL_SZ,
+ .reg_read = ds1685_nvram_read,
+ .reg_write = ds1685_nvram_write,
+ };
/* Get the platform data. */
pdata = (struct ds1685_rtc_platform_data *) pdev->dev.platform_data;
@@ -1499,11 +1357,15 @@ ds1685_rtc_probe(struct platform_device *pdev)
/* Setup complete. */
ds1685_rtc_switch_to_bank0(rtc);
-#ifdef CONFIG_SYSFS
- ret = ds1685_rtc_sysfs_register(&pdev->dev);
+ ret = rtc_add_group(rtc_dev, &ds1685_rtc_sysfs_misc_grp);
+ if (ret)
+ return ret;
+
+ rtc_dev->nvram_old_abi = true;
+ nvmem_cfg.priv = rtc;
+ ret = rtc_nvmem_register(rtc_dev, &nvmem_cfg);
if (ret)
return ret;
-#endif
return rtc_register_device(rtc_dev);
}
@@ -1517,10 +1379,6 @@ ds1685_rtc_remove(struct platform_device *pdev)
{
struct ds1685_priv *rtc = platform_get_drvdata(pdev);
-#ifdef CONFIG_SYSFS
- ds1685_rtc_sysfs_unregister(&pdev->dev);
-#endif
-
/* Read Ctrl B and clear PIE/AIE/UIE. */
rtc->write(rtc, RTC_CTRL_B,
(rtc->read(rtc, RTC_CTRL_B) &
diff --git a/drivers/rtc/rtc-isl1208.c b/drivers/rtc/rtc-isl1208.c
index ea18a8f4bce0..ec5ef518a09b 100644
--- a/drivers/rtc/rtc-isl1208.c
+++ b/drivers/rtc/rtc-isl1208.c
@@ -10,12 +10,11 @@
*
*/
-#include <linux/module.h>
-#include <linux/i2c.h>
#include <linux/bcd.h>
-#include <linux/rtc.h>
-#include "rtc-core.h"
+#include <linux/i2c.h>
+#include <linux/module.h>
#include <linux/of_irq.h>
+#include <linux/rtc.h>
/* Register map */
/* rtc section */
@@ -518,7 +517,7 @@ static ssize_t timestamp0_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
- struct i2c_client *client = dev_get_drvdata(dev);
+ struct i2c_client *client = to_i2c_client(dev->parent);
int sr;
sr = isl1208_i2c_get_sr(client);
@@ -540,7 +539,7 @@ static ssize_t timestamp0_store(struct device *dev,
static ssize_t timestamp0_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct i2c_client *client = dev_get_drvdata(dev);
+ struct i2c_client *client = to_i2c_client(dev->parent);
u8 regs[ISL1219_EVT_SECTION_LEN] = { 0, };
struct rtc_time tm;
int sr;
@@ -650,7 +649,7 @@ static ssize_t
isl1208_sysfs_show_atrim(struct device *dev,
struct device_attribute *attr, char *buf)
{
- int atr = isl1208_i2c_get_atr(to_i2c_client(dev));
+ int atr = isl1208_i2c_get_atr(to_i2c_client(dev->parent));
if (atr < 0)
return atr;
@@ -663,7 +662,7 @@ static ssize_t
isl1208_sysfs_show_dtrim(struct device *dev,
struct device_attribute *attr, char *buf)
{
- int dtr = isl1208_i2c_get_dtr(to_i2c_client(dev));
+ int dtr = isl1208_i2c_get_dtr(to_i2c_client(dev->parent));
if (dtr < 0)
return dtr;
@@ -676,7 +675,7 @@ static ssize_t
isl1208_sysfs_show_usr(struct device *dev,
struct device_attribute *attr, char *buf)
{
- int usr = isl1208_i2c_get_usr(to_i2c_client(dev));
+ int usr = isl1208_i2c_get_usr(to_i2c_client(dev->parent));
if (usr < 0)
return usr;
@@ -701,7 +700,10 @@ isl1208_sysfs_store_usr(struct device *dev,
if (usr < 0 || usr > 0xffff)
return -EINVAL;
- return isl1208_i2c_set_usr(to_i2c_client(dev), usr) ? -EIO : count;
+ if (isl1208_i2c_set_usr(to_i2c_client(dev->parent), usr))
+ return -EIO;
+
+ return count;
}
static DEVICE_ATTR(usr, S_IRUGO | S_IWUSR, isl1208_sysfs_show_usr,
@@ -765,7 +767,6 @@ isl1208_probe(struct i2c_client *client, const struct i2c_device_id *id)
rtc->ops = &isl1208_rtc_ops;
i2c_set_clientdata(client, rtc);
- dev_set_drvdata(&rtc->dev, client);
rc = isl1208_i2c_get_sr(client);
if (rc < 0) {
@@ -804,7 +805,7 @@ isl1208_probe(struct i2c_client *client, const struct i2c_device_id *id)
evdet_irq = of_irq_get_byname(np, "evdet");
}
- rc = sysfs_create_group(&client->dev.kobj, &isl1208_rtc_sysfs_files);
+ rc = rtc_add_group(rtc, &isl1208_rtc_sysfs_files);
if (rc)
return rc;
@@ -821,14 +822,6 @@ isl1208_probe(struct i2c_client *client, const struct i2c_device_id *id)
return rtc_register_device(rtc);
}
-static int
-isl1208_remove(struct i2c_client *client)
-{
- sysfs_remove_group(&client->dev.kobj, &isl1208_rtc_sysfs_files);
-
- return 0;
-}
-
static const struct i2c_device_id isl1208_id[] = {
{ "isl1208", TYPE_ISL1208 },
{ "isl1218", TYPE_ISL1218 },
@@ -851,7 +844,6 @@ static struct i2c_driver isl1208_driver = {
.of_match_table = of_match_ptr(isl1208_of_match),
},
.probe = isl1208_probe,
- .remove = isl1208_remove,
.id_table = isl1208_id,
};
diff --git a/drivers/rtc/rtc-lib.c b/drivers/rtc/rtc-lib.c
index 4a3c0f3aab14..ef160da84220 100644
--- a/drivers/rtc/rtc-lib.c
+++ b/drivers/rtc/rtc-lib.c
@@ -47,7 +47,7 @@ EXPORT_SYMBOL(rtc_year_days);
/*
- * rtc_time_to_tm64 - Converts time64_t to rtc_time.
+ * rtc_time64_to_tm - Converts time64_t to rtc_time.
* Convert seconds since 01-01-1970 00:00:00 to Gregorian date.
*/
void rtc_time64_to_tm(time64_t time, struct rtc_time *tm)
diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c
index ad03e2f12f5d..a3fb235fea0d 100644
--- a/drivers/rtc/rtc-m41t80.c
+++ b/drivers/rtc/rtc-m41t80.c
@@ -745,7 +745,7 @@ static int wdt_ioctl(struct file *file, unsigned int cmd,
return -EINVAL;
wdt_margin = new_margin;
wdt_ping();
- /* Fall */
+ /* Fall through */
case WDIOC_GETTIMEOUT:
return put_user(wdt_margin, (int __user *)arg);
diff --git a/drivers/rtc/rtc-mrst.c b/drivers/rtc/rtc-mrst.c
index 1925aaf09093..daf354a6a853 100644
--- a/drivers/rtc/rtc-mrst.c
+++ b/drivers/rtc/rtc-mrst.c
@@ -90,7 +90,7 @@ static int mrst_read_time(struct device *dev, struct rtc_time *time)
unsigned long flags;
if (vrtc_is_updating())
- mdelay(20);
+ msleep(20);
spin_lock_irqsave(&rtc_lock, flags);
time->tm_sec = vrtc_cmos_read(RTC_SECONDS);
@@ -261,11 +261,10 @@ static int mrst_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
static int mrst_procfs(struct device *dev, struct seq_file *seq)
{
- unsigned char rtc_control, valid;
+ unsigned char rtc_control;
spin_lock_irq(&rtc_lock);
rtc_control = vrtc_cmos_read(RTC_CONTROL);
- valid = vrtc_cmos_read(RTC_VALID);
spin_unlock_irq(&rtc_lock);
seq_printf(seq,
diff --git a/drivers/rtc/rtc-mt6397.c b/drivers/rtc/rtc-mt6397.c
index 385f8303bb41..e9a25ec4d434 100644
--- a/drivers/rtc/rtc-mt6397.c
+++ b/drivers/rtc/rtc-mt6397.c
@@ -332,6 +332,10 @@ static int mtk_rtc_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, rtc);
+ rtc->rtc_dev = devm_rtc_allocate_device(rtc->dev);
+ if (IS_ERR(rtc->rtc_dev))
+ return PTR_ERR(rtc->rtc_dev);
+
ret = request_threaded_irq(rtc->irq, NULL,
mtk_rtc_irq_handler_thread,
IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
@@ -344,11 +348,11 @@ static int mtk_rtc_probe(struct platform_device *pdev)
device_init_wakeup(&pdev->dev, 1);
- rtc->rtc_dev = rtc_device_register("mt6397-rtc", &pdev->dev,
- &mtk_rtc_ops, THIS_MODULE);
- if (IS_ERR(rtc->rtc_dev)) {
+ rtc->rtc_dev->ops = &mtk_rtc_ops;
+
+ ret = rtc_register_device(rtc->rtc_dev);
+ if (ret) {
dev_err(&pdev->dev, "register rtc device failed\n");
- ret = PTR_ERR(rtc->rtc_dev);
goto out_free_irq;
}
@@ -365,7 +369,6 @@ static int mtk_rtc_remove(struct platform_device *pdev)
{
struct mt6397_rtc *rtc = platform_get_drvdata(pdev);
- rtc_device_unregister(rtc->rtc_dev);
free_irq(rtc->irq, rtc->rtc_dev);
irq_dispose_mapping(rtc->irq);
diff --git a/drivers/rtc/rtc-mv.c b/drivers/rtc/rtc-mv.c
index 4b198b3778d3..e7f14bd12fe3 100644
--- a/drivers/rtc/rtc-mv.c
+++ b/drivers/rtc/rtc-mv.c
@@ -125,13 +125,9 @@ static int mv_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
/* hw counts from year 2000, but tm_year is relative to 1900 */
alm->time.tm_year = bcd2bin(year) + 100;
- if (rtc_valid_tm(&alm->time) < 0) {
- dev_err(dev, "retrieved alarm date/time is not valid.\n");
- rtc_time_to_tm(0, &alm->time);
- }
-
alm->enabled = !!readl(ioaddr + RTC_ALARM_INTERRUPT_MASK_REG_OFFS);
- return 0;
+
+ return rtc_valid_tm(&alm->time);
}
static int mv_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index 323ff55cc165..320b4a520eb3 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -421,12 +421,6 @@ static struct omap_rtc *omap_rtc_power_off_rtc;
* The RTC can be used to control an external PMIC via the pmic_power_en pin,
* which can be configured to transition to OFF on ALARM2 events.
*
- * Notes:
- * The two-second alarm offset is the shortest offset possible as the alarm
- * registers must be set before the next timer update and the offset
- * calculation is too heavy for everything to be done within a single access
- * period (~15 us).
- *
* Called with local interrupts disabled.
*/
static void omap_rtc_power_off(void)
@@ -434,6 +428,7 @@ static void omap_rtc_power_off(void)
struct omap_rtc *rtc = omap_rtc_power_off_rtc;
struct rtc_time tm;
unsigned long now;
+ int seconds;
u32 val;
rtc->type->unlock(rtc);
@@ -441,11 +436,13 @@ static void omap_rtc_power_off(void)
val = rtc_readl(rtc, OMAP_RTC_PMIC_REG);
rtc_writel(rtc, OMAP_RTC_PMIC_REG, val | OMAP_RTC_PMIC_POWER_EN_EN);
- /* set alarm two seconds from now */
+again:
+ /* set alarm one second from now */
omap_rtc_read_time_raw(rtc, &tm);
+ seconds = tm.tm_sec;
bcd2tm(&tm);
rtc_tm_to_time(&tm, &now);
- rtc_time_to_tm(now + 2, &tm);
+ rtc_time_to_tm(now + 1, &tm);
if (tm2bcd(&tm) < 0) {
dev_err(&rtc->rtc->dev, "power off failed\n");
@@ -470,14 +467,22 @@ static void omap_rtc_power_off(void)
val = rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG);
rtc_writel(rtc, OMAP_RTC_INTERRUPTS_REG,
val | OMAP_RTC_INTERRUPTS_IT_ALARM2);
+
+ /* Retry in case roll over happened before alarm was armed. */
+ if (rtc_read(rtc, OMAP_RTC_SECONDS_REG) != seconds) {
+ val = rtc_read(rtc, OMAP_RTC_STATUS_REG);
+ if (!(val & OMAP_RTC_STATUS_ALARM2))
+ goto again;
+ }
+
rtc->type->lock(rtc);
/*
- * Wait for alarm to trigger (within two seconds) and external PMIC to
+ * Wait for alarm to trigger (within one second) and external PMIC to
* power off the system. Add a 500 ms margin for external latencies
* (e.g. debounce circuits).
*/
- mdelay(2500);
+ mdelay(1500);
}
static const struct rtc_class_ops omap_rtc_ops = {
@@ -721,8 +726,7 @@ static int omap_rtc_probe(struct platform_device *pdev)
if (of_id) {
rtc->type = of_id->data;
rtc->is_pmic_controller = rtc->type->has_pmic_mode &&
- of_property_read_bool(pdev->dev.of_node,
- "system-power-controller");
+ of_device_is_system_power_controller(pdev->dev.of_node);
} else {
id_entry = platform_get_device_id(pdev);
rtc->type = (void *)id_entry->driver_data;
diff --git a/drivers/rtc/rtc-pl030.c b/drivers/rtc/rtc-pl030.c
index f85a1a93e669..343bb6ed1783 100644
--- a/drivers/rtc/rtc-pl030.c
+++ b/drivers/rtc/rtc-pl030.c
@@ -112,6 +112,13 @@ static int pl030_probe(struct amba_device *dev, const struct amba_id *id)
goto err_rtc;
}
+ rtc->rtc = devm_rtc_allocate_device(&dev->dev);
+ if (IS_ERR(rtc->rtc)) {
+ ret = PTR_ERR(rtc->rtc);
+ goto err_rtc;
+ }
+
+ rtc->rtc->ops = &pl030_ops;
rtc->base = ioremap(dev->res.start, resource_size(&dev->res));
if (!rtc->base) {
ret = -ENOMEM;
@@ -128,12 +135,9 @@ static int pl030_probe(struct amba_device *dev, const struct amba_id *id)
if (ret)
goto err_irq;
- rtc->rtc = rtc_device_register("pl030", &dev->dev, &pl030_ops,
- THIS_MODULE);
- if (IS_ERR(rtc->rtc)) {
- ret = PTR_ERR(rtc->rtc);
+ ret = rtc_register_device(rtc->rtc);
+ if (ret)
goto err_reg;
- }
return 0;
@@ -154,7 +158,6 @@ static int pl030_remove(struct amba_device *dev)
writel(0, rtc->base + RTC_CR);
free_irq(dev->irq[0], rtc);
- rtc_device_unregister(rtc->rtc);
iounmap(rtc->base);
amba_release_regions(dev);
diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c
index 82eb7da2c478..30943d200c5e 100644
--- a/drivers/rtc/rtc-pl031.c
+++ b/drivers/rtc/rtc-pl031.c
@@ -310,7 +310,6 @@ static int pl031_remove(struct amba_device *adev)
device_init_wakeup(&adev->dev, false);
if (adev->irq[0])
free_irq(adev->irq[0], ldata);
- rtc_device_unregister(ldata->rtc);
amba_release_regions(adev);
return 0;
@@ -383,24 +382,25 @@ static int pl031_probe(struct amba_device *adev, const struct amba_id *id)
}
device_init_wakeup(&adev->dev, true);
- ldata->rtc = rtc_device_register("pl031", &adev->dev, ops,
- THIS_MODULE);
- if (IS_ERR(ldata->rtc)) {
- ret = PTR_ERR(ldata->rtc);
+ ldata->rtc = devm_rtc_allocate_device(&adev->dev);
+ if (IS_ERR(ldata->rtc))
+ return PTR_ERR(ldata->rtc);
+
+ ldata->rtc->ops = ops;
+
+ ret = rtc_register_device(ldata->rtc);
+ if (ret)
goto out;
- }
if (adev->irq[0]) {
ret = request_irq(adev->irq[0], pl031_interrupt,
vendor->irqflags, "rtc-pl031", ldata);
if (ret)
- goto out_no_irq;
+ goto out;
dev_pm_set_wake_irq(&adev->dev, adev->irq[0]);
}
return 0;
-out_no_irq:
- rtc_device_unregister(ldata->rtc);
out:
amba_release_regions(adev);
err_req:
diff --git a/drivers/rtc/rtc-rs5c348.c b/drivers/rtc/rtc-rs5c348.c
index f2de8b17e7e3..6582be707bd0 100644
--- a/drivers/rtc/rtc-rs5c348.c
+++ b/drivers/rtc/rtc-rs5c348.c
@@ -66,6 +66,17 @@ rs5c348_rtc_set_time(struct device *dev, struct rtc_time *tm)
u8 txbuf[5+7], *txp;
int ret;
+ ret = spi_w8r8(spi, RS5C348_CMD_R(RS5C348_REG_CTL2));
+ if (ret < 0)
+ return ret;
+ if (ret & RS5C348_BIT_XSTP) {
+ txbuf[0] = RS5C348_CMD_W(RS5C348_REG_CTL2);
+ txbuf[1] = 0;
+ ret = spi_write_then_read(spi, txbuf, 2, NULL, 0);
+ if (ret < 0)
+ return ret;
+ }
+
/* Transfer 5 bytes before writing SEC. This gives 31us for carry. */
txp = txbuf;
txbuf[0] = RS5C348_CMD_R(RS5C348_REG_CTL2); /* cmd, ctl2 */
@@ -102,6 +113,16 @@ rs5c348_rtc_read_time(struct device *dev, struct rtc_time *tm)
u8 txbuf[5], rxbuf[7];
int ret;
+ ret = spi_w8r8(spi, RS5C348_CMD_R(RS5C348_REG_CTL2));
+ if (ret < 0)
+ return ret;
+ if (ret & RS5C348_BIT_VDET)
+ dev_warn(&spi->dev, "voltage-low detected.\n");
+ if (ret & RS5C348_BIT_XSTP) {
+ dev_warn(&spi->dev, "oscillator-stop detected.\n");
+ return -EINVAL;
+ }
+
/* Transfer 5 byte befores reading SEC. This gives 31us for carry. */
txbuf[0] = RS5C348_CMD_R(RS5C348_REG_CTL2); /* cmd, ctl2 */
txbuf[1] = 0; /* dummy */
@@ -143,8 +164,6 @@ static const struct rtc_class_ops rs5c348_rtc_ops = {
.set_time = rs5c348_rtc_set_time,
};
-static struct spi_driver rs5c348_driver;
-
static int rs5c348_probe(struct spi_device *spi)
{
int ret;
@@ -161,53 +180,27 @@ static int rs5c348_probe(struct spi_device *spi)
ret = spi_w8r8(spi, RS5C348_CMD_R(RS5C348_REG_SECS));
if (ret < 0 || (ret & 0x80)) {
dev_err(&spi->dev, "not found.\n");
- goto kfree_exit;
+ return ret;
}
dev_info(&spi->dev, "spiclk %u KHz.\n",
(spi->max_speed_hz + 500) / 1000);
- /* turn RTC on if it was not on */
- ret = spi_w8r8(spi, RS5C348_CMD_R(RS5C348_REG_CTL2));
- if (ret < 0)
- goto kfree_exit;
- if (ret & (RS5C348_BIT_XSTP | RS5C348_BIT_VDET)) {
- u8 buf[2];
- struct rtc_time tm;
- if (ret & RS5C348_BIT_VDET)
- dev_warn(&spi->dev, "voltage-low detected.\n");
- if (ret & RS5C348_BIT_XSTP)
- dev_warn(&spi->dev, "oscillator-stop detected.\n");
- rtc_time_to_tm(0, &tm); /* 1970/1/1 */
- ret = rs5c348_rtc_set_time(&spi->dev, &tm);
- if (ret < 0)
- goto kfree_exit;
- buf[0] = RS5C348_CMD_W(RS5C348_REG_CTL2);
- buf[1] = 0;
- ret = spi_write_then_read(spi, buf, sizeof(buf), NULL, 0);
- if (ret < 0)
- goto kfree_exit;
- }
-
ret = spi_w8r8(spi, RS5C348_CMD_R(RS5C348_REG_CTL1));
if (ret < 0)
- goto kfree_exit;
+ return ret;
if (ret & RS5C348_BIT_24H)
pdata->rtc_24h = 1;
- rtc = devm_rtc_device_register(&spi->dev, rs5c348_driver.driver.name,
- &rs5c348_rtc_ops, THIS_MODULE);
-
- if (IS_ERR(rtc)) {
- ret = PTR_ERR(rtc);
- goto kfree_exit;
- }
+ rtc = devm_rtc_allocate_device(&spi->dev);
+ if (IS_ERR(rtc))
+ return PTR_ERR(rtc);
pdata->rtc = rtc;
- return 0;
- kfree_exit:
- return ret;
+ rtc->ops = &rs5c348_rtc_ops;
+
+ return rtc_register_device(rtc);
}
static struct spi_driver rs5c348_driver = {
diff --git a/drivers/rtc/rtc-rv8803.c b/drivers/rtc/rtc-rv8803.c
index 29fc3d210392..450a0b831a2d 100644
--- a/drivers/rtc/rtc-rv8803.c
+++ b/drivers/rtc/rtc-rv8803.c
@@ -615,6 +615,7 @@ static int rv8803_probe(struct i2c_client *client,
static const struct i2c_device_id rv8803_id[] = {
{ "rv8803", rv_8803 },
+ { "rx8803", rv_8803 },
{ "rx8900", rx_8900 },
{ }
};
@@ -623,7 +624,11 @@ MODULE_DEVICE_TABLE(i2c, rv8803_id);
static const struct of_device_id rv8803_of_match[] = {
{
.compatible = "microcrystal,rv8803",
- .data = (void *)rx_8900
+ .data = (void *)rv_8803
+ },
+ {
+ .compatible = "epson,rx8803",
+ .data = (void *)rv_8803
},
{
.compatible = "epson,rx8900",
diff --git a/drivers/rtc/rtc-s35390a.c b/drivers/rtc/rtc-s35390a.c
index 77feb603cd4c..3c64dbb08109 100644
--- a/drivers/rtc/rtc-s35390a.c
+++ b/drivers/rtc/rtc-s35390a.c
@@ -108,7 +108,7 @@ static int s35390a_get_reg(struct s35390a *s35390a, int reg, char *buf, int len)
static int s35390a_init(struct s35390a *s35390a)
{
- char buf;
+ u8 buf;
int ret;
unsigned initcount = 0;
diff --git a/drivers/rtc/rtc-sc27xx.c b/drivers/rtc/rtc-sc27xx.c
index deea5c3726ad..b4eb3b3c6c2c 100644
--- a/drivers/rtc/rtc-sc27xx.c
+++ b/drivers/rtc/rtc-sc27xx.c
@@ -129,19 +129,6 @@ static int sprd_rtc_clear_alarm_ints(struct sprd_rtc *rtc)
SPRD_RTC_ALM_INT_MASK);
}
-static int sprd_rtc_disable_ints(struct sprd_rtc *rtc)
-{
- int ret;
-
- ret = regmap_update_bits(rtc->regmap, rtc->base + SPRD_RTC_INT_EN,
- SPRD_RTC_INT_MASK, 0);
- if (ret)
- return ret;
-
- return regmap_write(rtc->regmap, rtc->base + SPRD_RTC_INT_CLR,
- SPRD_RTC_INT_MASK);
-}
-
static int sprd_rtc_lock_alarm(struct sprd_rtc *rtc, bool lock)
{
int ret;
@@ -172,7 +159,8 @@ static int sprd_rtc_lock_alarm(struct sprd_rtc *rtc, bool lock)
return ret;
}
- return 0;
+ return regmap_write(rtc->regmap, rtc->base + SPRD_RTC_INT_CLR,
+ SPRD_RTC_SPG_UPD_EN);
}
static int sprd_rtc_get_secs(struct sprd_rtc *rtc, enum sprd_rtc_reg_types type,
@@ -427,10 +415,14 @@ static int sprd_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
u32 val;
/*
- * If aie_timer is enabled, we should get the normal alarm time.
+ * Before RTC device is registered, it will check to see if there is an
+ * alarm already set in RTC hardware, and we always read the normal
+ * alarm at this time.
+ *
+ * Or if aie_timer is enabled, we should get the normal alarm time.
* Otherwise we should get auxiliary alarm time.
*/
- if (rtc->rtc && rtc->rtc->aie_timer.enabled == 0)
+ if (rtc->rtc && rtc->rtc->registered && rtc->rtc->aie_timer.enabled == 0)
return sprd_rtc_read_aux_alarm(dev, alrm);
ret = sprd_rtc_get_secs(rtc, SPRD_RTC_ALARM, &secs);
@@ -575,6 +567,32 @@ static int sprd_rtc_check_power_down(struct sprd_rtc *rtc)
return 0;
}
+static int sprd_rtc_check_alarm_int(struct sprd_rtc *rtc)
+{
+ u32 val;
+ int ret;
+
+ ret = regmap_read(rtc->regmap, rtc->base + SPRD_RTC_SPG_VALUE, &val);
+ if (ret)
+ return ret;
+
+ /*
+ * The SPRD_RTC_INT_EN register is not put in always-power-on region
+ * supplied by VDDRTC, so we should check if we need enable the alarm
+ * interrupt when system booting.
+ *
+ * If we have set SPRD_RTC_POWEROFF_ALM_FLAG which is saved in
+ * always-power-on region, that means we have set one alarm last time,
+ * so we should enable the alarm interrupt to help RTC core to see if
+ * there is an alarm already set in RTC hardware.
+ */
+ if (!(val & SPRD_RTC_POWEROFF_ALM_FLAG))
+ return 0;
+
+ return regmap_update_bits(rtc->regmap, rtc->base + SPRD_RTC_INT_EN,
+ SPRD_RTC_ALARM_EN, SPRD_RTC_ALARM_EN);
+}
+
static int sprd_rtc_probe(struct platform_device *pdev)
{
struct device_node *node = pdev->dev.of_node;
@@ -608,10 +626,10 @@ static int sprd_rtc_probe(struct platform_device *pdev)
rtc->dev = &pdev->dev;
platform_set_drvdata(pdev, rtc);
- /* clear all RTC interrupts and disable all RTC interrupts */
- ret = sprd_rtc_disable_ints(rtc);
+ /* check if we need set the alarm interrupt */
+ ret = sprd_rtc_check_alarm_int(rtc);
if (ret) {
- dev_err(&pdev->dev, "failed to disable RTC interrupts\n");
+ dev_err(&pdev->dev, "failed to check RTC alarm interrupt\n");
return ret;
}
@@ -631,16 +649,18 @@ static int sprd_rtc_probe(struct platform_device *pdev)
return ret;
}
+ device_init_wakeup(&pdev->dev, 1);
+
rtc->rtc->ops = &sprd_rtc_ops;
rtc->rtc->range_min = 0;
rtc->rtc->range_max = 5662310399LL;
ret = rtc_register_device(rtc->rtc);
if (ret) {
dev_err(&pdev->dev, "failed to register rtc device\n");
+ device_init_wakeup(&pdev->dev, 0);
return ret;
}
- device_init_wakeup(&pdev->dev, 1);
return 0;
}
diff --git a/drivers/rtc/rtc-sun6i.c b/drivers/rtc/rtc-sun6i.c
index 2cd5a7b1a2e3..fe07310952df 100644
--- a/drivers/rtc/rtc-sun6i.c
+++ b/drivers/rtc/rtc-sun6i.c
@@ -199,8 +199,7 @@ static void __init sun6i_rtc_clk_init(struct device_node *node)
if (!rtc)
return;
- clk_data = kzalloc(sizeof(*clk_data) + (sizeof(*clk_data->hws) * 2),
- GFP_KERNEL);
+ clk_data = kzalloc(struct_size(clk_data, hws, 2), GFP_KERNEL);
if (!clk_data) {
kfree(rtc);
return;
diff --git a/drivers/rtc/rtc-sysfs.c b/drivers/rtc/rtc-sysfs.c
index f1ff30ade534..9746c32eee2e 100644
--- a/drivers/rtc/rtc-sysfs.c
+++ b/drivers/rtc/rtc-sysfs.c
@@ -338,8 +338,8 @@ int rtc_add_groups(struct rtc_device *rtc, const struct attribute_group **grps)
new_cnt = old_cnt + add_cnt + 1;
groups = devm_kcalloc(&rtc->dev, new_cnt, sizeof(*groups), GFP_KERNEL);
- if (IS_ERR_OR_NULL(groups))
- return PTR_ERR(groups);
+ if (!groups)
+ return -ENOMEM;
memcpy(groups, rtc->dev.groups, old_cnt * sizeof(*groups));
memcpy(groups + old_cnt, grps, add_cnt * sizeof(*groups));
groups[old_cnt + add_cnt] = NULL;
diff --git a/drivers/rtc/rtc-tegra.c b/drivers/rtc/rtc-tegra.c
index 8dc48fe7fc35..c9e77a83cd1b 100644
--- a/drivers/rtc/rtc-tegra.c
+++ b/drivers/rtc/rtc-tegra.c
@@ -322,9 +322,13 @@ static int __init tegra_rtc_probe(struct platform_device *pdev)
if (IS_ERR(info->rtc_base))
return PTR_ERR(info->rtc_base);
- info->tegra_rtc_irq = platform_get_irq(pdev, 0);
- if (info->tegra_rtc_irq <= 0)
- return -EBUSY;
+ ret = platform_get_irq(pdev, 0);
+ if (ret <= 0) {
+ dev_err(&pdev->dev, "failed to get platform IRQ: %d\n", ret);
+ return ret;
+ }
+
+ info->tegra_rtc_irq = ret;
info->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(info->clk))
diff --git a/drivers/rtc/rtc-test.c b/drivers/rtc/rtc-test.c
index ade6a82709be..6c5f09c815e8 100644
--- a/drivers/rtc/rtc-test.c
+++ b/drivers/rtc/rtc-test.c
@@ -1,11 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* An RTC test device/driver
* Copyright (C) 2005 Tower Technologies
* Author: Alessandro Zummo <a.zummo@towertech.it>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#include <linux/module.h>
@@ -197,7 +194,7 @@ static void __exit test_exit(void)
MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
MODULE_DESCRIPTION("RTC test driver/device");
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
module_init(test_init);
module_exit(test_exit);
diff --git a/drivers/rtc/rtc-tx4939.c b/drivers/rtc/rtc-tx4939.c
index 08dbefc79520..61c110b2045f 100644
--- a/drivers/rtc/rtc-tx4939.c
+++ b/drivers/rtc/rtc-tx4939.c
@@ -253,9 +253,7 @@ static int __init tx4939_rtc_probe(struct platform_device *pdev)
struct resource *res;
int irq, ret;
struct nvmem_config nvmem_cfg = {
- .name = "rv8803_nvram",
- .word_size = 4,
- .stride = 4,
+ .name = "tx4939_nvram",
.size = TX4939_RTC_REG_RAMSIZE,
.reg_read = tx4939_nvram_read,
.reg_write = tx4939_nvram_write,
diff --git a/drivers/rtc/rtc-vr41xx.c b/drivers/rtc/rtc-vr41xx.c
index 70f013e692b0..e66d0f63cee2 100644
--- a/drivers/rtc/rtc-vr41xx.c
+++ b/drivers/rtc/rtc-vr41xx.c
@@ -136,8 +136,7 @@ static int vr41xx_rtc_set_time(struct device *dev, struct rtc_time *time)
time64_t epoch_sec, current_sec;
epoch_sec = mktime64(epoch, 1, 1, 0, 0, 0);
- current_sec = mktime64(time->tm_year + 1900, time->tm_mon + 1, time->tm_mday,
- time->tm_hour, time->tm_min, time->tm_sec);
+ current_sec = rtc_tm_to_time64(time);
write_elapsed_second(current_sec - epoch_sec);
@@ -158,7 +157,7 @@ static int vr41xx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)
spin_unlock_irq(&rtc_lock);
- rtc_time_to_tm((high << 17) | (mid << 1) | (low >> 15), time);
+ rtc_time64_to_tm((high << 17) | (mid << 1) | (low >> 15), time);
return 0;
}
@@ -166,10 +165,8 @@ static int vr41xx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)
static int vr41xx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)
{
time64_t alarm_sec;
- struct rtc_time *time = &wkalrm->time;
- alarm_sec = mktime64(time->tm_year + 1900, time->tm_mon + 1, time->tm_mday,
- time->tm_hour, time->tm_min, time->tm_sec);
+ alarm_sec = rtc_tm_to_time64(&wkalrm->time);
spin_lock_irq(&rtc_lock);
diff --git a/include/linux/rtc.h b/include/linux/rtc.h
index 6aedc30003e7..c8bb4a2b48c3 100644
--- a/include/linux/rtc.h
+++ b/include/linux/rtc.h
@@ -167,17 +167,12 @@ struct rtc_device {
#define RTC_TIMESTAMP_BEGIN_2000 946684800LL /* 2000-01-01 00:00:00 */
#define RTC_TIMESTAMP_END_2099 4102444799LL /* 2099-12-31 23:59:59 */
-extern struct rtc_device *rtc_device_register(const char *name,
- struct device *dev,
- const struct rtc_class_ops *ops,
- struct module *owner);
extern struct rtc_device *devm_rtc_device_register(struct device *dev,
const char *name,
const struct rtc_class_ops *ops,
struct module *owner);
struct rtc_device *devm_rtc_allocate_device(struct device *dev);
int __rtc_register_device(struct module *owner, struct rtc_device *rtc);
-extern void rtc_device_unregister(struct rtc_device *rtc);
extern void devm_rtc_device_unregister(struct device *dev,
struct rtc_device *rtc);
@@ -277,4 +272,20 @@ static inline int rtc_nvmem_register(struct rtc_device *rtc,
static inline void rtc_nvmem_unregister(struct rtc_device *rtc) {}
#endif
+#ifdef CONFIG_RTC_INTF_SYSFS
+int rtc_add_group(struct rtc_device *rtc, const struct attribute_group *grp);
+int rtc_add_groups(struct rtc_device *rtc, const struct attribute_group **grps);
+#else
+static inline
+int rtc_add_group(struct rtc_device *rtc, const struct attribute_group *grp)
+{
+ return 0;
+}
+
+static inline
+int rtc_add_groups(struct rtc_device *rtc, const struct attribute_group **grps)
+{
+ return 0;
+}
+#endif
#endif /* _LINUX_RTC_H_ */