summaryrefslogtreecommitdiffstats
path: root/drivers/rtc
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2018-08-20 16:30:27 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-08-20 16:30:27 -0700
commitbfebeb16722d93caf7870b63aa7d094b6843479a (patch)
tree48cfc8044f7604b99a127a3c0667ff20f57e22ef /drivers/rtc
parent3933ec73cd9bbff4a98259d0eae606af4e2850a2 (diff)
parent6b583a64fd1e019fd01626b46892ebf2361951c5 (diff)
downloadlinux-bfebeb16722d93caf7870b63aa7d094b6843479a.tar.bz2
Merge tag 'rtc-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
Pull RTC updates from Alexandre Belloni: "It is now possible to add custom sysfs attributes while avoiding a possible race condition. Unused code has been removed resulting in a nice reduction of the code base. And more drivers have been switched to SPDX by their maintainers. Summary: Subsystem: - new helpers to add custom sysfs attributes - struct rtc_task removal along with rtc_irq_[un]register() - rtc_irq_set_state and rtc_irq_set_freq are not exported anymore Drivers: - armada38x: reset after rtc power loss - ds1307: now supports m41t11 - isl1208: now supports isl1219 and tamper detection - pcf2127: internal SRAM support" * tag 'rtc-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (34 commits) rtc: ds1307: simplify hwmon config rtc: s5m: Add SPDX license identifier rtc: maxim: Add SPDX license identifiers rtc: isl1219: add device tree documentation rtc: isl1208: set ev-evienb bit from device tree rtc: isl1208: Add "evdet" interrupt source for isl1219 rtc: isl1208: add support for isl1219 with tamper detection rtc: sysfs: facilitate attribute add to rtc device rtc: remove struct rtc_task char: rtc: remove task handling rtc: pcf85063: preserve control register value between stop and start rtc: sh: remove unused variable rtc_dev rtc: unexport rtc_irq_set_* rtc: simplify rtc_irq_set_state/rtc_irq_set_freq rtc: remove irq_task and irq_task_lock rtc: remove rtc_irq_register/rtc_irq_unregister rtc: sh: remove dead code rtc: sa1100: don't set PIE frequency rtc: ds1307: support m41t11 variant rtc: ds1307: fix data pointer to m41t0 ...
Diffstat (limited to 'drivers/rtc')
-rw-r--r--drivers/rtc/Kconfig21
-rw-r--r--drivers/rtc/class.c5
-rw-r--r--drivers/rtc/interface.c97
-rw-r--r--drivers/rtc/rtc-armada38x.c23
-rw-r--r--drivers/rtc/rtc-bq4802.c4
-rw-r--r--drivers/rtc/rtc-core.h14
-rw-r--r--drivers/rtc/rtc-dev.c8
-rw-r--r--drivers/rtc/rtc-ds1307.c18
-rw-r--r--drivers/rtc/rtc-ds1685.c590
-rw-r--r--drivers/rtc/rtc-isl1208.c192
-rw-r--r--drivers/rtc/rtc-m48t59.c4
-rw-r--r--drivers/rtc/rtc-max77686.c20
-rw-r--r--drivers/rtc/rtc-max8997.c20
-rw-r--r--drivers/rtc/rtc-max8998.c20
-rw-r--r--drivers/rtc/rtc-omap.c23
-rw-r--r--drivers/rtc/rtc-pcf2127.c68
-rw-r--r--drivers/rtc/rtc-pcf85063.c21
-rw-r--r--drivers/rtc/rtc-s5m.c22
-rw-r--r--drivers/rtc/rtc-sa1100.c1
-rw-r--r--drivers/rtc/rtc-sh.c90
-rw-r--r--drivers/rtc/rtc-snvs.c105
-rw-r--r--drivers/rtc/rtc-stmp3xxx.c20
-rw-r--r--drivers/rtc/rtc-sysfs.c43
-rw-r--r--drivers/rtc/rtc-test.c2
24 files changed, 490 insertions, 941 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index a2ba5db36145..7d7be60a2413 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -244,15 +244,6 @@ config RTC_DRV_DS1307
This driver can also be built as a module. If so, the module
will be called rtc-ds1307.
-config RTC_DRV_DS1307_HWMON
- bool "HWMON support for rtc-ds1307"
- depends on RTC_DRV_DS1307 && HWMON
- depends on !(RTC_DRV_DS1307=y && HWMON=m)
- default y
- help
- Say Y here if you want to expose temperature sensor data on
- rtc-ds1307 (only DS3231)
-
config RTC_DRV_DS1307_CENTURY
bool "Century bit support for rtc-ds1307"
depends on RTC_DRV_DS1307
@@ -1027,18 +1018,6 @@ config RTC_DS1685_PROC_REGS
Unless you are debugging this driver, choose N.
-config RTC_DS1685_SYSFS_REGS
- bool "SysFS access to RTC register bits"
- depends on RTC_DRV_DS1685_FAMILY && SYSFS
- help
- Enable this to provide access to the RTC control register bits
- in /sys. Some of the bits are read-write, others are read-only.
-
- Keep in mind that reading Control C's bits automatically clears
- all pending IRQ flags - this can cause lost interrupts.
-
- If you know that you need access to these bits, choose Y, Else N.
-
config RTC_DRV_DS1742
tristate "Maxim/Dallas DS1742/1743"
depends on HAS_IOMEM
diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c
index d37588f08055..0fca4d74c76b 100644
--- a/drivers/rtc/class.c
+++ b/drivers/rtc/class.c
@@ -68,7 +68,7 @@ static int rtc_suspend(struct device *dev)
return 0;
}
- getnstimeofday64(&old_system);
+ ktime_get_real_ts64(&old_system);
old_rtc.tv_sec = rtc_tm_to_time64(&tm);
@@ -110,7 +110,7 @@ static int rtc_resume(struct device *dev)
return 0;
/* snapshot the current rtc and system time at resume */
- getnstimeofday64(&new_system);
+ ktime_get_real_ts64(&new_system);
err = rtc_read_time(rtc, &tm);
if (err < 0) {
pr_debug("%s: fail to read rtc time\n", dev_name(&rtc->dev));
@@ -172,7 +172,6 @@ static struct rtc_device *rtc_allocate_device(void)
mutex_init(&rtc->ops_lock);
spin_lock_init(&rtc->irq_lock);
- spin_lock_init(&rtc->irq_task_lock);
init_waitqueue_head(&rtc->irq_queue);
/* Init timerqueue */
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index bac1eeb3d312..3d577e259e91 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -607,12 +607,6 @@ void rtc_handle_legacy_irq(struct rtc_device *rtc, int num, int mode)
rtc->irq_data = (rtc->irq_data + (num << 8)) | (RTC_IRQF|mode);
spin_unlock_irqrestore(&rtc->irq_lock, flags);
- /* call the task func */
- spin_lock_irqsave(&rtc->irq_task_lock, flags);
- if (rtc->irq_task)
- rtc->irq_task->func(rtc->irq_task->private_data);
- spin_unlock_irqrestore(&rtc->irq_task_lock, flags);
-
wake_up_interruptible(&rtc->irq_queue);
kill_fasync(&rtc->async_queue, SIGIO, POLL_IN);
}
@@ -721,39 +715,6 @@ void rtc_class_close(struct rtc_device *rtc)
}
EXPORT_SYMBOL_GPL(rtc_class_close);
-int rtc_irq_register(struct rtc_device *rtc, struct rtc_task *task)
-{
- int retval = -EBUSY;
-
- if (task == NULL || task->func == NULL)
- return -EINVAL;
-
- /* Cannot register while the char dev is in use */
- if (test_and_set_bit_lock(RTC_DEV_BUSY, &rtc->flags))
- return -EBUSY;
-
- spin_lock_irq(&rtc->irq_task_lock);
- if (rtc->irq_task == NULL) {
- rtc->irq_task = task;
- retval = 0;
- }
- spin_unlock_irq(&rtc->irq_task_lock);
-
- clear_bit_unlock(RTC_DEV_BUSY, &rtc->flags);
-
- return retval;
-}
-EXPORT_SYMBOL_GPL(rtc_irq_register);
-
-void rtc_irq_unregister(struct rtc_device *rtc, struct rtc_task *task)
-{
- spin_lock_irq(&rtc->irq_task_lock);
- if (rtc->irq_task == task)
- rtc->irq_task = NULL;
- spin_unlock_irq(&rtc->irq_task_lock);
-}
-EXPORT_SYMBOL_GPL(rtc_irq_unregister);
-
static int rtc_update_hrtimer(struct rtc_device *rtc, int enabled)
{
/*
@@ -785,71 +746,45 @@ static int rtc_update_hrtimer(struct rtc_device *rtc, int enabled)
* Context: any
*
* Note that rtc_irq_set_freq() should previously have been used to
- * specify the desired frequency of periodic IRQ task->func() callbacks.
+ * specify the desired frequency of periodic IRQ.
*/
-int rtc_irq_set_state(struct rtc_device *rtc, struct rtc_task *task, int enabled)
+int rtc_irq_set_state(struct rtc_device *rtc, int enabled)
{
int err = 0;
- unsigned long flags;
-retry:
- spin_lock_irqsave(&rtc->irq_task_lock, flags);
- if (rtc->irq_task != NULL && task == NULL)
- err = -EBUSY;
- else if (rtc->irq_task != task)
- err = -EACCES;
- else {
- if (rtc_update_hrtimer(rtc, enabled) < 0) {
- spin_unlock_irqrestore(&rtc->irq_task_lock, flags);
- cpu_relax();
- goto retry;
- }
- rtc->pie_enabled = enabled;
- }
- spin_unlock_irqrestore(&rtc->irq_task_lock, flags);
+ while (rtc_update_hrtimer(rtc, enabled) < 0)
+ cpu_relax();
+
+ rtc->pie_enabled = enabled;
trace_rtc_irq_set_state(enabled, err);
return err;
}
-EXPORT_SYMBOL_GPL(rtc_irq_set_state);
/**
* 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 with which task->func() will be called
+ * @freq: positive frequency
* Context: any
*
* Note that rtc_irq_set_state() is used to enable or disable the
* periodic IRQs.
*/
-int rtc_irq_set_freq(struct rtc_device *rtc, struct rtc_task *task, int freq)
+int rtc_irq_set_freq(struct rtc_device *rtc, int freq)
{
int err = 0;
- unsigned long flags;
if (freq <= 0 || freq > RTC_MAX_FREQ)
return -EINVAL;
-retry:
- spin_lock_irqsave(&rtc->irq_task_lock, flags);
- if (rtc->irq_task != NULL && task == NULL)
- err = -EBUSY;
- else if (rtc->irq_task != task)
- err = -EACCES;
- else {
- rtc->irq_freq = freq;
- if (rtc->pie_enabled && rtc_update_hrtimer(rtc, 1) < 0) {
- spin_unlock_irqrestore(&rtc->irq_task_lock, flags);
- cpu_relax();
- goto retry;
- }
- }
- spin_unlock_irqrestore(&rtc->irq_task_lock, flags);
+
+ rtc->irq_freq = freq;
+ while (rtc->pie_enabled && rtc_update_hrtimer(rtc, 1) < 0)
+ cpu_relax();
trace_rtc_irq_set_freq(freq, err);
return err;
}
-EXPORT_SYMBOL_GPL(rtc_irq_set_freq);
/**
* rtc_timer_enqueue - Adds a rtc_timer to the rtc_device timerqueue
@@ -979,8 +914,8 @@ again:
timerqueue_del(&rtc->timerqueue, &timer->node);
trace_rtc_timer_dequeue(timer);
timer->enabled = 0;
- if (timer->task.func)
- timer->task.func(timer->task.private_data);
+ if (timer->func)
+ timer->func(timer->private_data);
trace_rtc_timer_fired(timer);
/* Re-add/fwd periodic timers */
@@ -1035,8 +970,8 @@ void rtc_timer_init(struct rtc_timer *timer, void (*f)(void *p), void *data)
{
timerqueue_init(&timer->node);
timer->enabled = 0;
- timer->task.func = f;
- timer->task.private_data = data;
+ timer->func = f;
+ timer->private_data = data;
}
/* rtc_timer_start - Sets an rtc_timer to fire in the future
diff --git a/drivers/rtc/rtc-armada38x.c b/drivers/rtc/rtc-armada38x.c
index 1e4978c96ffd..bde53c8ccee2 100644
--- a/drivers/rtc/rtc-armada38x.c
+++ b/drivers/rtc/rtc-armada38x.c
@@ -30,6 +30,8 @@
#define RTC_IRQ_FREQ_1HZ BIT(2)
#define RTC_CCR 0x18
#define RTC_CCR_MODE BIT(15)
+#define RTC_CONF_TEST 0x1C
+#define RTC_NOMINAL_TIMING BIT(13)
#define RTC_TIME 0xC
#define RTC_ALARM1 0x10
@@ -75,6 +77,7 @@ struct armada38x_rtc {
void __iomem *regs_soc;
spinlock_t lock;
int irq;
+ bool initialized;
struct value_to_freq *val_to_freq;
struct armada38x_rtc_data *data;
};
@@ -226,6 +229,23 @@ static int armada38x_rtc_read_time(struct device *dev, struct rtc_time *tm)
return 0;
}
+static void armada38x_rtc_reset(struct armada38x_rtc *rtc)
+{
+ u32 reg;
+
+ reg = rtc->data->read_rtc_reg(rtc, RTC_CONF_TEST);
+ /* If bits [7:0] are non-zero, assume RTC was uninitialized */
+ if (reg & 0xff) {
+ rtc_delayed_write(0, rtc, RTC_CONF_TEST);
+ msleep(500); /* Oscillator startup time */
+ rtc_delayed_write(0, rtc, RTC_TIME);
+ rtc_delayed_write(SOC_RTC_ALARM1 | SOC_RTC_ALARM2, rtc,
+ RTC_STATUS);
+ rtc_delayed_write(RTC_NOMINAL_TIMING, rtc, RTC_CCR);
+ }
+ rtc->initialized = true;
+}
+
static int armada38x_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
struct armada38x_rtc *rtc = dev_get_drvdata(dev);
@@ -237,6 +257,9 @@ static int armada38x_rtc_set_time(struct device *dev, struct rtc_time *tm)
if (ret)
goto out;
+ if (!rtc->initialized)
+ armada38x_rtc_reset(rtc);
+
spin_lock_irqsave(&rtc->lock, flags);
rtc_delayed_write(time, rtc, RTC_TIME);
spin_unlock_irqrestore(&rtc->lock, flags);
diff --git a/drivers/rtc/rtc-bq4802.c b/drivers/rtc/rtc-bq4802.c
index d768f6747961..113493b52149 100644
--- a/drivers/rtc/rtc-bq4802.c
+++ b/drivers/rtc/rtc-bq4802.c
@@ -162,6 +162,10 @@ static int bq4802_probe(struct platform_device *pdev)
} else if (p->r->flags & IORESOURCE_MEM) {
p->regs = devm_ioremap(&pdev->dev, p->r->start,
resource_size(p->r));
+ if (!p->regs){
+ err = -ENOMEM;
+ goto out;
+ }
p->read = bq4802_read_mem;
p->write = bq4802_write_mem;
} else {
diff --git a/drivers/rtc/rtc-core.h b/drivers/rtc/rtc-core.h
index 0abf98983e13..ccc17a2e293d 100644
--- a/drivers/rtc/rtc-core.h
+++ b/drivers/rtc/rtc-core.h
@@ -40,9 +40,23 @@ 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-dev.c b/drivers/rtc/rtc-dev.c
index efa221e8bc22..43d962a9c210 100644
--- a/drivers/rtc/rtc-dev.c
+++ b/drivers/rtc/rtc-dev.c
@@ -341,11 +341,11 @@ static long rtc_dev_ioctl(struct file *file,
return rtc_set_time(rtc, &tm);
case RTC_PIE_ON:
- err = rtc_irq_set_state(rtc, NULL, 1);
+ err = rtc_irq_set_state(rtc, 1);
break;
case RTC_PIE_OFF:
- err = rtc_irq_set_state(rtc, NULL, 0);
+ err = rtc_irq_set_state(rtc, 0);
break;
case RTC_AIE_ON:
@@ -365,7 +365,7 @@ static long rtc_dev_ioctl(struct file *file,
return rtc_update_irq_enable(rtc, 0);
case RTC_IRQP_SET:
- err = rtc_irq_set_freq(rtc, NULL, arg);
+ err = rtc_irq_set_freq(rtc, arg);
break;
case RTC_IRQP_READ:
@@ -427,7 +427,7 @@ static int rtc_dev_release(struct inode *inode, struct file *file)
/* Keep ioctl until all drivers are converted */
rtc_dev_ioctl(file, RTC_UIE_OFF, 0);
rtc_update_irq_enable(rtc, 0);
- rtc_irq_set_state(rtc, NULL, 0);
+ rtc_irq_set_state(rtc, 0);
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 e9ec4160d7f6..4b2b4627daeb 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -44,6 +44,7 @@ enum ds_type {
ds_3231,
m41t0,
m41t00,
+ m41t11,
mcp794xx,
rx_8025,
rx_8130,
@@ -227,6 +228,11 @@ static const struct chip_desc chips[last_ds_type] = {
.irq_handler = rx8130_irq,
.rtc_ops = &rx8130_rtc_ops,
},
+ [m41t11] = {
+ /* this is battery backed SRAM */
+ .nvram_offset = 8,
+ .nvram_size = 56,
+ },
[mcp794xx] = {
.alarm = 1,
/* this is battery backed SRAM */
@@ -249,6 +255,7 @@ static const struct i2c_device_id ds1307_id[] = {
{ "ds3231", ds_3231 },
{ "m41t0", m41t0 },
{ "m41t00", m41t00 },
+ { "m41t11", m41t11 },
{ "mcp7940x", mcp794xx },
{ "mcp7941x", mcp794xx },
{ "pt7c4338", ds_1307 },
@@ -299,13 +306,17 @@ static const struct of_device_id ds1307_of_match[] = {
},
{
.compatible = "st,m41t0",
- .data = (void *)m41t00
+ .data = (void *)m41t0
},
{
.compatible = "st,m41t00",
.data = (void *)m41t00
},
{
+ .compatible = "st,m41t11",
+ .data = (void *)m41t11
+ },
+ {
.compatible = "microchip,mcp7940x",
.data = (void *)mcp794xx
},
@@ -347,6 +358,7 @@ static const struct acpi_device_id ds1307_acpi_ids[] = {
{ .id = "DS3231", .driver_data = ds_3231 },
{ .id = "M41T0", .driver_data = m41t0 },
{ .id = "M41T00", .driver_data = m41t00 },
+ { .id = "M41T11", .driver_data = m41t11 },
{ .id = "MCP7940X", .driver_data = mcp794xx },
{ .id = "MCP7941X", .driver_data = mcp794xx },
{ .id = "PT7C4338", .driver_data = ds_1307 },
@@ -1030,7 +1042,7 @@ static u8 ds1307_trickle_init(struct ds1307 *ds1307,
/*----------------------------------------------------------------------*/
-#ifdef CONFIG_RTC_DRV_DS1307_HWMON
+#if IS_REACHABLE(CONFIG_HWMON)
/*
* Temperature sensor support for ds3231 devices.
@@ -1576,6 +1588,7 @@ read_rtc:
case ds_1307:
case m41t0:
case m41t00:
+ case m41t11:
/* clock halted? turn it on, so clock can tick. */
if (tmp & DS1307_BIT_CH) {
regmap_write(ds1307->regmap, DS1307_REG_SECS, 0);
@@ -1641,6 +1654,7 @@ read_rtc:
case ds_1340:
case m41t0:
case m41t00:
+ case m41t11:
/*
* NOTE: ignores century bits; fix before deploying
* systems that will run through year 2100.
diff --git a/drivers/rtc/rtc-ds1685.c b/drivers/rtc/rtc-ds1685.c
index 5c0db6c8134c..6f39f683a98c 100644
--- a/drivers/rtc/rtc-ds1685.c
+++ b/drivers/rtc/rtc-ds1685.c
@@ -1188,552 +1188,6 @@ ds1685_rtc_sysfs_misc_grp = {
.attrs = ds1685_rtc_sysfs_misc_attrs,
};
-#ifdef CONFIG_RTC_DS1685_SYSFS_REGS
-/**
- * struct ds1685_rtc_ctrl_regs.
- * @name: char pointer for the bit name.
- * @reg: control register the bit is in.
- * @bit: the bit's offset in the register.
- */
-struct ds1685_rtc_ctrl_regs {
- const char *name;
- const u8 reg;
- const u8 bit;
-};
-
-/*
- * Ctrl register bit lookup table.
- */
-static const struct ds1685_rtc_ctrl_regs
-ds1685_ctrl_regs_table[] = {
- { "uip", RTC_CTRL_A, RTC_CTRL_A_UIP },
- { "dv2", RTC_CTRL_A, RTC_CTRL_A_DV2 },
- { "dv1", RTC_CTRL_A, RTC_CTRL_A_DV1 },
- { "dv0", RTC_CTRL_A, RTC_CTRL_A_DV0 },
- { "rs3", RTC_CTRL_A, RTC_CTRL_A_RS3 },
- { "rs2", RTC_CTRL_A, RTC_CTRL_A_RS2 },
- { "rs1", RTC_CTRL_A, RTC_CTRL_A_RS1 },
- { "rs0", RTC_CTRL_A, RTC_CTRL_A_RS0 },
- { "set", RTC_CTRL_B, RTC_CTRL_B_SET },
- { "pie", RTC_CTRL_B, RTC_CTRL_B_PIE },
- { "aie", RTC_CTRL_B, RTC_CTRL_B_AIE },
- { "uie", RTC_CTRL_B, RTC_CTRL_B_UIE },
- { "sqwe", RTC_CTRL_B, RTC_CTRL_B_SQWE },
- { "dm", RTC_CTRL_B, RTC_CTRL_B_DM },
- { "2412", RTC_CTRL_B, RTC_CTRL_B_2412 },
- { "dse", RTC_CTRL_B, RTC_CTRL_B_DSE },
- { "irqf", RTC_CTRL_C, RTC_CTRL_C_IRQF },
- { "pf", RTC_CTRL_C, RTC_CTRL_C_PF },
- { "af", RTC_CTRL_C, RTC_CTRL_C_AF },
- { "uf", RTC_CTRL_C, RTC_CTRL_C_UF },
- { "vrt", RTC_CTRL_D, RTC_CTRL_D_VRT },
- { "vrt2", RTC_EXT_CTRL_4A, RTC_CTRL_4A_VRT2 },
- { "incr", RTC_EXT_CTRL_4A, RTC_CTRL_4A_INCR },
- { "pab", RTC_EXT_CTRL_4A, RTC_CTRL_4A_PAB },
- { "rf", RTC_EXT_CTRL_4A, RTC_CTRL_4A_RF },
- { "wf", RTC_EXT_CTRL_4A, RTC_CTRL_4A_WF },
- { "kf", RTC_EXT_CTRL_4A, RTC_CTRL_4A_KF },
-#if !defined(CONFIG_RTC_DRV_DS1685) && !defined(CONFIG_RTC_DRV_DS1689)
- { "bme", RTC_EXT_CTRL_4A, RTC_CTRL_4A_BME },
-#endif
- { "abe", RTC_EXT_CTRL_4B, RTC_CTRL_4B_ABE },
- { "e32k", RTC_EXT_CTRL_4B, RTC_CTRL_4B_E32K },
- { "cs", RTC_EXT_CTRL_4B, RTC_CTRL_4B_CS },
- { "rce", RTC_EXT_CTRL_4B, RTC_CTRL_4B_RCE },
- { "prs", RTC_EXT_CTRL_4B, RTC_CTRL_4B_PRS },
- { "rie", RTC_EXT_CTRL_4B, RTC_CTRL_4B_RIE },
- { "wie", RTC_EXT_CTRL_4B, RTC_CTRL_4B_WIE },
- { "kse", RTC_EXT_CTRL_4B, RTC_CTRL_4B_KSE },
- { NULL, 0, 0 },
-};
-
-/**
- * ds1685_rtc_sysfs_ctrl_regs_lookup - ctrl register bit lookup function.
- * @name: ctrl register bit to look up in ds1685_ctrl_regs_table.
- */
-static const struct ds1685_rtc_ctrl_regs*
-ds1685_rtc_sysfs_ctrl_regs_lookup(const char *name)
-{
- const struct ds1685_rtc_ctrl_regs *p = ds1685_ctrl_regs_table;
-
- for (; p->name != NULL; ++p)
- if (strcmp(p->name, name) == 0)
- return p;
-
- return NULL;
-}
-
-/**
- * ds1685_rtc_sysfs_ctrl_regs_show - reads a ctrl register bit via sysfs.
- * @dev: pointer to device structure.
- * @attr: pointer to device_attribute structure.
- * @buf: pointer to char array to hold the output.
- */
-static ssize_t
-ds1685_rtc_sysfs_ctrl_regs_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- u8 tmp;
- struct ds1685_priv *rtc = dev_get_drvdata(dev);
- const struct ds1685_rtc_ctrl_regs *reg_info =
- ds1685_rtc_sysfs_ctrl_regs_lookup(attr->attr.name);
-
- /* Make sure we actually matched something. */
- if (!reg_info)
- return -EINVAL;
-
- /* No spinlock during a read -- mutex is already held. */
- ds1685_rtc_switch_to_bank1(rtc);
- tmp = rtc->read(rtc, reg_info->reg) & reg_info->bit;
- ds1685_rtc_switch_to_bank0(rtc);
-
- return sprintf(buf, "%d\n", (tmp ? 1 : 0));
-}
-
-/**
- * ds1685_rtc_sysfs_ctrl_regs_store - writes a ctrl register bit via sysfs.
- * @dev: pointer to device structure.
- * @attr: pointer to device_attribute structure.
- * @buf: pointer to char array to hold the output.
- * @count: number of bytes written.
- */
-static ssize_t
-ds1685_rtc_sysfs_ctrl_regs_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct ds1685_priv *rtc = dev_get_drvdata(dev);
- u8 reg = 0, bit = 0, tmp;
- unsigned long flags;
- long int val = 0;
- const struct ds1685_rtc_ctrl_regs *reg_info =
- ds1685_rtc_sysfs_ctrl_regs_lookup(attr->attr.name);
-
- /* We only accept numbers. */
- if (kstrtol(buf, 10, &val) < 0)
- return -EINVAL;
-
- /* bits are binary, 0 or 1 only. */
- if ((val != 0) && (val != 1))
- return -ERANGE;
-
- /* Make sure we actually matched something. */
- if (!reg_info)
- return -EINVAL;
-
- reg = reg_info->reg;
- bit = reg_info->bit;
-
- /* Safe to spinlock during a write. */
- ds1685_rtc_begin_ctrl_access(rtc, &flags);
- tmp = rtc->read(rtc, reg);
- rtc->write(rtc, reg, (val ? (tmp | bit) : (tmp & ~(bit))));
- ds1685_rtc_end_ctrl_access(rtc, flags);
-
- return count;
-}
-
-/**
- * DS1685_RTC_SYSFS_CTRL_REG_RO - device_attribute for read-only register bit.
- * @bit: bit to read.
- */
-#define DS1685_RTC_SYSFS_CTRL_REG_RO(bit) \
- static DEVICE_ATTR(bit, S_IRUGO, \
- ds1685_rtc_sysfs_ctrl_regs_show, NULL)
-
-/**
- * DS1685_RTC_SYSFS_CTRL_REG_RW - device_attribute for read-write register bit.
- * @bit: bit to read or write.
- */
-#define DS1685_RTC_SYSFS_CTRL_REG_RW(bit) \
- static DEVICE_ATTR(bit, S_IRUGO | S_IWUSR, \
- ds1685_rtc_sysfs_ctrl_regs_show, \
- ds1685_rtc_sysfs_ctrl_regs_store)
-
-/*
- * Control Register A bits.
- */
-DS1685_RTC_SYSFS_CTRL_REG_RO(uip);
-DS1685_RTC_SYSFS_CTRL_REG_RW(dv2);
-DS1685_RTC_SYSFS_CTRL_REG_RW(dv1);
-DS1685_RTC_SYSFS_CTRL_REG_RO(dv0);
-DS1685_RTC_SYSFS_CTRL_REG_RW(rs3);
-DS1685_RTC_SYSFS_CTRL_REG_RW(rs2);
-DS1685_RTC_SYSFS_CTRL_REG_RW(rs1);
-DS1685_RTC_SYSFS_CTRL_REG_RW(rs0);
-
-static struct attribute*
-ds1685_rtc_sysfs_ctrla_attrs[] = {
- &dev_attr_uip.attr,
- &dev_attr_dv2.attr,
- &dev_attr_dv1.attr,
- &dev_attr_dv0.attr,
- &dev_attr_rs3.attr,
- &dev_attr_rs2.attr,
- &dev_attr_rs1.attr,
- &dev_attr_rs0.attr,
- NULL,
-};
-
-static const struct attribute_group
-ds1685_rtc_sysfs_ctrla_grp = {
- .name = "ctrla",
- .attrs = ds1685_rtc_sysfs_ctrla_attrs,
-};
-
-
-/*
- * Control Register B bits.
- */
-DS1685_RTC_SYSFS_CTRL_REG_RO(set);
-DS1685_RTC_SYSFS_CTRL_REG_RW(pie);
-DS1685_RTC_SYSFS_CTRL_REG_RW(aie);
-DS1685_RTC_SYSFS_CTRL_REG_RW(uie);
-DS1685_RTC_SYSFS_CTRL_REG_RW(sqwe);
-DS1685_RTC_SYSFS_CTRL_REG_RO(dm);
-DS1685_RTC_SYSFS_CTRL_REG_RO(2412);
-DS1685_RTC_SYSFS_CTRL_REG_RO(dse);
-
-static struct attribute*
-ds1685_rtc_sysfs_ctrlb_attrs[] = {
- &dev_attr_set.attr,
- &dev_attr_pie.attr,
- &dev_attr_aie.attr,
- &dev_attr_uie.attr,
- &dev_attr_sqwe.attr,
- &dev_attr_dm.attr,
- &dev_attr_2412.attr,
- &dev_attr_dse.attr,
- NULL,
-};
-
-static const struct attribute_group
-ds1685_rtc_sysfs_ctrlb_grp = {
- .name = "ctrlb",
- .attrs = ds1685_rtc_sysfs_ctrlb_attrs,
-};
-
-/*
- * Control Register C bits.
- *
- * Reading Control C clears these bits! Reading them individually can
- * possibly cause an interrupt to be missed. Use the /proc interface
- * to see all the bits in this register simultaneously.
- */
-DS1685_RTC_SYSFS_CTRL_REG_RO(irqf);
-DS1685_RTC_SYSFS_CTRL_REG_RO(pf);
-DS1685_RTC_SYSFS_CTRL_REG_RO(af);
-DS1685_RTC_SYSFS_CTRL_REG_RO(uf);
-
-static struct attribute*
-ds1685_rtc_sysfs_ctrlc_attrs[] = {
- &dev_attr_irqf.attr,
- &dev_attr_pf.attr,
- &dev_attr_af.attr,
- &dev_attr_uf.attr,
- NULL,
-};
-
-static const struct attribute_group
-ds1685_rtc_sysfs_ctrlc_grp = {
- .name = "ctrlc",
- .attrs = ds1685_rtc_sysfs_ctrlc_attrs,
-};
-
-/*
- * Control Register D bits.
- */
-DS1685_RTC_SYSFS_CTRL_REG_RO(vrt);
-
-static struct attribute*
-ds1685_rtc_sysfs_ctrld_attrs[] = {
- &dev_attr_vrt.attr,
- NULL,
-};
-
-static const struct attribute_group
-ds1685_rtc_sysfs_ctrld_grp = {
- .name = "ctrld",
- .attrs = ds1685_rtc_sysfs_ctrld_attrs,
-};
-
-/*
- * Control Register 4A bits.
- */
-DS1685_RTC_SYSFS_CTRL_REG_RO(vrt2);
-DS1685_RTC_SYSFS_CTRL_REG_RO(incr);
-DS1685_RTC_SYSFS_CTRL_REG_RW(pab);
-DS1685_RTC_SYSFS_CTRL_REG_RW(rf);
-DS1685_RTC_SYSFS_CTRL_REG_RW(wf);
-DS1685_RTC_SYSFS_CTRL_REG_RW(kf);
-#if !defined(CONFIG_RTC_DRV_DS1685) && !defined(CONFIG_RTC_DRV_DS1689)
-DS1685_RTC_SYSFS_CTRL_REG_RO(bme);
-#endif
-
-static struct attribute*
-ds1685_rtc_sysfs_ctrl4a_attrs[] = {
- &dev_attr_vrt2.attr,
- &dev_attr_incr.attr,
- &dev_attr_pab.attr,
- &dev_attr_rf.attr,
- &dev_attr_wf.attr,
- &dev_attr_kf.attr,
-#if !defined(CONFIG_RTC_DRV_DS1685) && !defined(CONFIG_RTC_DRV_DS1689)
- &dev_attr_bme.attr,
-#endif
- NULL,
-};
-
-static const struct attribute_group
-ds1685_rtc_sysfs_ctrl4a_grp = {
- .name = "ctrl4a",
- .attrs = ds1685_rtc_sysfs_ctrl4a_attrs,
-};
-
-/*
- * Control Register 4B bits.
- */
-DS1685_RTC_SYSFS_CTRL_REG_RW(abe);
-DS1685_RTC_SYSFS_CTRL_REG_RW(e32k);
-DS1685_RTC_SYSFS_CTRL_REG_RO(cs);
-DS1685_RTC_SYSFS_CTRL_REG_RW(rce);
-DS1685_RTC_SYSFS_CTRL_REG_RW(prs);
-DS1685_RTC_SYSFS_CTRL_REG_RW(rie);
-DS1685_RTC_SYSFS_CTRL_REG_RW(wie);
-DS1685_RTC_SYSFS_CTRL_REG_RW(kse);
-
-static struct attribute*
-ds1685_rtc_sysfs_ctrl4b_attrs[] = {
- &dev_attr_abe.attr,
- &dev_attr_e32k.attr,
- &dev_attr_cs.attr,
- &dev_attr_rce.attr,
- &dev_attr_prs.attr,
- &dev_attr_rie.attr,
- &dev_attr_wie.attr,
- &dev_attr_kse.attr,
- NULL,
-};
-
-static const struct attribute_group
-ds1685_rtc_sysfs_ctrl4b_grp = {
- .name = "ctrl4b",
- .attrs = ds1685_rtc_sysfs_ctrl4b_attrs,
-};
-
-
-/**
- * struct ds1685_rtc_ctrl_regs.
- * @name: char pointer for the bit name.
- * @reg: control register the bit is in.
- * @bit: the bit's offset in the register.
- */
-struct ds1685_rtc_time_regs {
- const char *name;
- const u8 reg;
- const u8 mask;
- const u8 min;
- const u8 max;
-};
-
-/*
- * Time/Date register lookup tables.
- */
-static const struct ds1685_rtc_time_regs
-ds1685_time_regs_bcd_table[] = {
- { "seconds", RTC_SECS, RTC_SECS_BCD_MASK, 0, 59 },
- { "minutes", RTC_MINS, RTC_MINS_BCD_MASK, 0, 59 },
- { "hours", RTC_HRS, RTC_HRS_24_BCD_MASK, 0, 23 },
- { "wday", RTC_WDAY, RTC_WDAY_MASK, 1, 7 },
- { "mday", RTC_MDAY, RTC_MDAY_BCD_MASK, 1, 31 },
- { "month", RTC_MONTH, RTC_MONTH_BCD_MASK, 1, 12 },
- { "year", RTC_YEAR, RTC_YEAR_BCD_MASK, 0, 99 },
- { "century", RTC_CENTURY, RTC_CENTURY_MASK, 0, 99 },
- { "alarm_seconds", RTC_SECS_ALARM, RTC_SECS_BCD_MASK, 0, 59 },
- { "alarm_minutes", RTC_MINS_ALARM, RTC_MINS_BCD_MASK, 0, 59 },
- { "alarm_hours", RTC_HRS_ALARM, RTC_HRS_24_BCD_MASK, 0, 23 },
- { "alarm_mday", RTC_MDAY_ALARM, RTC_MDAY_ALARM_MASK, 1, 31 },
- { NULL, 0, 0, 0, 0 },
-};
-
-static const struct ds1685_rtc_time_regs
-ds1685_time_regs_bin_table[] = {
- { "seconds", RTC_SECS, RTC_SECS_BIN_MASK, 0x00, 0x3b },
- { "minutes", RTC_MINS, RTC_MINS_BIN_MASK, 0x00, 0x3b },
- { "hours", RTC_HRS, RTC_HRS_24_BIN_MASK, 0x00, 0x17 },
- { "wday", RTC_WDAY, RTC_WDAY_MASK, 0x01, 0x07 },
- { "mday", RTC_MDAY, RTC_MDAY_BIN_MASK, 0x01, 0x1f },
- { "month", RTC_MONTH, RTC_MONTH_BIN_MASK, 0x01, 0x0c },
- { "year", RTC_YEAR, RTC_YEAR_BIN_MASK, 0x00, 0x63 },
- { "century", RTC_CENTURY, RTC_CENTURY_MASK, 0x00, 0x63 },
- { "alarm_seconds", RTC_SECS_ALARM, RTC_SECS_BIN_MASK, 0x00, 0x3b },
- { "alarm_minutes", RTC_MINS_ALARM, RTC_MINS_BIN_MASK, 0x00, 0x3b },
- { "alarm_hours", RTC_HRS_ALARM, RTC_HRS_24_BIN_MASK, 0x00, 0x17 },
- { "alarm_mday", RTC_MDAY_ALARM, RTC_MDAY_ALARM_MASK, 0x01, 0x1f },
- { NULL, 0, 0, 0x00, 0x00 },
-};
-
-/**
- * ds1685_rtc_sysfs_time_regs_bcd_lookup - time/date reg bit lookup function.
- * @name: register bit to look up in ds1685_time_regs_bcd_table.
- */
-static const struct ds1685_rtc_time_regs*
-ds1685_rtc_sysfs_time_regs_lookup(const char *name, bool bcd_mode)
-{
- const struct ds1685_rtc_time_regs *p;
-
- if (bcd_mode)
- p = ds1685_time_regs_bcd_table;
- else
- p = ds1685_time_regs_bin_table;
-
- for (; p->name != NULL; ++p)
- if (strcmp(p->name, name) == 0)
- return p;
-
- return NULL;
-}
-
-/**
- * ds1685_rtc_sysfs_time_regs_show - reads a time/date register via sysfs.
- * @dev: pointer to device structure.
- * @attr: pointer to device_attribute structure.
- * @buf: pointer to char array to hold the output.
- */
-static ssize_t
-ds1685_rtc_sysfs_time_regs_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- u8 tmp;
- struct ds1685_priv *rtc = dev_get_drvdata(dev);
- const struct ds1685_rtc_time_regs *bcd_reg_info =
- ds1685_rtc_sysfs_time_regs_lookup(attr->attr.name, true);
- const struct ds1685_rtc_time_regs *bin_reg_info =
- ds1685_rtc_sysfs_time_regs_lookup(attr->attr.name, false);
-
- /* Make sure we actually matched something. */
- if (!bcd_reg_info || !bin_reg_info)
- return -EINVAL;
-
- /* bcd_reg_info->reg == bin_reg_info->reg. */
- ds1685_rtc_begin_data_access(rtc);
- tmp = rtc->read(rtc, bcd_reg_info->reg);
- ds1685_rtc_end_data_access(rtc);
-
- tmp = ds1685_rtc_bcd2bin(rtc, tmp, bcd_reg_info->mask,
- bin_reg_info->mask);
-
- return sprintf(buf, "%d\n", tmp);
-}
-
-/**
- * ds1685_rtc_sysfs_time_regs_store - writes a time/date register via sysfs.
- * @dev: pointer to device structure.
- * @attr: pointer to device_attribute structure.
- * @buf: pointer to char array to hold the output.
- * @count: number of bytes written.
- */
-static ssize_t
-ds1685_rtc_sysfs_time_regs_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- long int val = 0;
- struct ds1685_priv *rtc = dev_get_drvdata(dev);
- const struct ds1685_rtc_time_regs *bcd_reg_info =
- ds1685_rtc_sysfs_time_regs_lookup(attr->attr.name, true);
- const struct ds1685_rtc_time_regs *bin_reg_info =
- ds1685_rtc_sysfs_time_regs_lookup(attr->attr.name, false);
-
- /* We only accept numbers. */
- if (kstrtol(buf, 10, &val) < 0)
- return -EINVAL;
-
- /* Make sure we actually matched something. */
- if (!bcd_reg_info || !bin_reg_info)
- return -EINVAL;
-
- /* Check for a valid range. */
- if (rtc->bcd_mode) {
- if ((val < bcd_reg_info->min) || (val > bcd_reg_info->max))
- return -ERANGE;
- } else {
- if ((val < bin_reg_info->min) || (val > bin_reg_info->max))
- return -ERANGE;
- }
-
- val = ds1685_rtc_bin2bcd(rtc, val, bin_reg_info->mask,
- bcd_reg_info->mask);
-
- /* bcd_reg_info->reg == bin_reg_info->reg. */
- ds1685_rtc_begin_data_access(rtc);
- rtc->write(rtc, bcd_reg_info->reg, val);
- ds1685_rtc_end_data_access(rtc);
-
- return count;
-}
-
-/**
- * DS1685_RTC_SYSFS_REG_RW - device_attribute for a read-write time register.
- * @reg: time/date register to read or write.
- */
-#define DS1685_RTC_SYSFS_TIME_REG_RW(reg) \
- static DEVICE_ATTR(reg, S_IRUGO | S_IWUSR, \
- ds1685_rtc_sysfs_time_regs_show, \
- ds1685_rtc_sysfs_time_regs_store)
-
-/*
- * Time/Date Register bits.
- */
-DS1685_RTC_SYSFS_TIME_REG_RW(seconds);
-DS1685_RTC_SYSFS_TIME_REG_RW(minutes);
-DS1685_RTC_SYSFS_TIME_REG_RW(hours);
-DS1685_RTC_SYSFS_TIME_REG_RW(wday);
-DS1685_RTC_SYSFS_TIME_REG_RW(mday);
-DS1685_RTC_SYSFS_TIME_REG_RW(month);
-DS1685_RTC_SYSFS_TIME_REG_RW(year);
-DS1685_RTC_SYSFS_TIME_REG_RW(century);
-DS1685_RTC_SYSFS_TIME_REG_RW(alarm_seconds);
-DS1685_RTC_SYSFS_TIME_REG_RW(alarm_minutes);
-DS1685_RTC_SYSFS_TIME_REG_RW(alarm_hours);
-DS1685_RTC_SYSFS_TIME_REG_RW(alarm_mday);
-
-static struct attribute*
-ds1685_rtc_sysfs_time_attrs[] = {
- &dev_attr_seconds.attr,
- &dev_attr_minutes.attr,
- &dev_attr_hours.attr,
- &dev_attr_wday.attr,
- &dev_attr_mday.attr,
- &dev_attr_month.attr,
- &dev_attr_year.attr,
- &dev_attr_century.attr,
- NULL,
-};
-
-static const struct attribute_group
-ds1685_rtc_sysfs_time_grp = {
- .name = "datetime",
- .attrs = ds1685_rtc_sysfs_time_attrs,
-};
-
-static struct attribute*
-ds1685_rtc_sysfs_alarm_attrs[] = {
- &dev_attr_alarm_seconds.attr,
- &dev_attr_alarm_minutes.attr,
- &dev_attr_alarm_hours.attr,
- &dev_attr_alarm_mday.attr,
- NULL,
-};
-
-static const struct attribute_group
-ds1685_rtc_sysfs_alarm_grp = {
- .name = "alarm",
- .attrs = ds1685_rtc_sysfs_alarm_attrs,
-};
-#endif /* CONFIG_RTC_DS1685_SYSFS_REGS */
-
-
/**
* ds1685_rtc_sysfs_register - register sysfs files.
* @dev: pointer to device structure.
@@ -1752,39 +1206,6 @@ ds1685_rtc_sysfs_register(struct device *dev)
if (ret)
return ret;
-#ifdef CONFIG_RTC_DS1685_SYSFS_REGS
- ret = sysfs_create_group(&dev->kobj, &ds1685_rtc_sysfs_ctrla_grp);
- if (ret)
- return ret;
-
- ret = sysfs_create_group(&dev->kobj, &ds1685_rtc_sysfs_ctrlb_grp);
- if (ret)
- return ret;
-
- ret = sysfs_create_group(&dev->kobj, &ds1685_rtc_sysfs_ctrlc_grp);
- if (ret)
- return ret;
-
- ret = sysfs_create_group(&dev->kobj, &ds1685_rtc_sysfs_ctrld_grp);
- if (ret)
- return ret;
-
- ret = sysfs_create_group(&dev->kobj, &ds1685_rtc_sysfs_ctrl4a_grp);
- if (ret)
- return ret;
-
- ret = sysfs_create_group(&dev->kobj, &ds1685_rtc_sysfs_ctrl4b_grp);
- if (ret)
- return ret;
-
- ret = sysfs_create_group(&dev->kobj, &ds1685_rtc_sysfs_time_grp);
- if (ret)
- return ret;
-
- ret = sysfs_create_group(&dev->kobj, &ds1685_rtc_sysfs_alarm_grp);
- if (ret)
- return ret;
-#endif
return 0;
}
@@ -1798,17 +1219,6 @@ 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);
-#ifdef CONFIG_RTC_DS1685_SYSFS_REGS
- sysfs_remove_group(&dev->kobj, &ds1685_rtc_sysfs_ctrla_grp);
- sysfs_remove_group(&dev->kobj, &ds1685_rtc_sysfs_ctrlb_grp);
- sysfs_remove_group(&dev->kobj, &ds1685_rtc_sysfs_ctrlc_grp);
- sysfs_remove_group(&dev->kobj, &ds1685_rtc_sysfs_ctrld_grp);
- sysfs_remove_group(&dev->kobj, &ds1685_rtc_sysfs_ctrl4a_grp);
- sysfs_remove_group(&dev->kobj, &ds1685_rtc_sysfs_ctrl4b_grp);
- sysfs_remove_group(&dev->kobj, &ds1685_rtc_sysfs_time_grp);
- sysfs_remove_group(&dev->kobj, &ds1685_rtc_sysfs_alarm_grp);
-#endif
-
return 0;
}
#endif /* CONFIG_SYSFS */
diff --git a/drivers/rtc/rtc-isl1208.c b/drivers/rtc/rtc-isl1208.c
index 1a2c38cc0178..ea18a8f4bce0 100644
--- a/drivers/rtc/rtc-isl1208.c
+++ b/drivers/rtc/rtc-isl1208.c
@@ -14,6 +14,8 @@
#include <linux/i2c.h>
#include <linux/bcd.h>
#include <linux/rtc.h>
+#include "rtc-core.h"
+#include <linux/of_irq.h>
/* Register map */
/* rtc section */
@@ -33,13 +35,16 @@
#define ISL1208_REG_SR_ARST (1<<7) /* auto reset */
#define ISL1208_REG_SR_XTOSCB (1<<6) /* crystal oscillator */
#define ISL1208_REG_SR_WRTC (1<<4) /* write rtc */
+#define ISL1208_REG_SR_EVT (1<<3) /* event */
#define ISL1208_REG_SR_ALM (1<<2) /* alarm */
#define ISL1208_REG_SR_BAT (1<<1) /* battery */
#define ISL1208_REG_SR_RTCF (1<<0) /* rtc fail */
#define ISL1208_REG_INT 0x08
#define ISL1208_REG_INT_ALME (1<<6) /* alarm enable */
#define ISL1208_REG_INT_IM (1<<7) /* interrupt/alarm mode */
-#define ISL1208_REG_09 0x09 /* reserved */
+#define ISL1219_REG_EV 0x09
+#define ISL1219_REG_EV_EVEN (1<<4) /* event detection enable */
+#define ISL1219_REG_EV_EVIENB (1<<7) /* event in pull-up disable */
#define ISL1208_REG_ATR 0x0a
#define ISL1208_REG_DTR 0x0b
@@ -57,8 +62,24 @@
#define ISL1208_REG_USR2 0x13
#define ISL1208_USR_SECTION_LEN 2
+/* event section */
+#define ISL1219_REG_SCT 0x14
+#define ISL1219_REG_MNT 0x15
+#define ISL1219_REG_HRT 0x16
+#define ISL1219_REG_DTT 0x17
+#define ISL1219_REG_MOT 0x18
+#define ISL1219_REG_YRT 0x19
+#define ISL1219_EVT_SECTION_LEN 6
+
static struct i2c_driver isl1208_driver;
+/* ISL1208 various variants */
+enum {
+ TYPE_ISL1208 = 0,
+ TYPE_ISL1218,
+ TYPE_ISL1219,
+};
+
/* block read */
static int
isl1208_i2c_read_regs(struct i2c_client *client, u8 reg, u8 buf[],
@@ -80,8 +101,8 @@ isl1208_i2c_read_regs(struct i2c_client *client, u8 reg, u8 buf[],
};
int ret;
- BUG_ON(reg > ISL1208_REG_USR2);
- BUG_ON(reg + len > ISL1208_REG_USR2 + 1);
+ WARN_ON(reg > ISL1219_REG_YRT);
+ WARN_ON(reg + len > ISL1219_REG_YRT + 1);
ret = i2c_transfer(client->adapter, msgs, 2);
if (ret > 0)
@@ -104,8 +125,8 @@ isl1208_i2c_set_regs(struct i2c_client *client, u8 reg, u8 const buf[],
};
int ret;
- BUG_ON(reg > ISL1208_REG_USR2);
- BUG_ON(reg + len > ISL1208_REG_USR2 + 1);
+ WARN_ON(reg > ISL1219_REG_YRT);
+ WARN_ON(reg + len > ISL1219_REG_YRT + 1);
i2c_buf[0] = reg;
memcpy(&i2c_buf[1], &buf[0], len);
@@ -493,6 +514,73 @@ isl1208_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
return isl1208_i2c_set_alarm(to_i2c_client(dev), alarm);
}
+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);
+ int sr;
+
+ sr = isl1208_i2c_get_sr(client);
+ if (sr < 0) {
+ dev_err(dev, "%s: reading SR failed\n", __func__);
+ return sr;
+ }
+
+ sr &= ~ISL1208_REG_SR_EVT;
+
+ sr = i2c_smbus_write_byte_data(client, ISL1208_REG_SR, sr);
+ if (sr < 0)
+ dev_err(dev, "%s: writing SR failed\n",
+ __func__);
+
+ return count;
+};
+
+static ssize_t timestamp0_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct i2c_client *client = dev_get_drvdata(dev);
+ u8 regs[ISL1219_EVT_SECTION_LEN] = { 0, };
+ struct rtc_time tm;
+ int sr;
+
+ sr = isl1208_i2c_get_sr(client);
+ if (sr < 0) {
+ dev_err(dev, "%s: reading SR failed\n", __func__);
+ return sr;
+ }
+
+ if (!(sr & ISL1208_REG_SR_EVT))
+ return 0;
+
+ sr = isl1208_i2c_read_regs(client, ISL1219_REG_SCT, regs,
+ ISL1219_EVT_SECTION_LEN);
+ if (sr < 0) {
+ dev_err(dev, "%s: reading event section failed\n",
+ __func__);
+ return 0;
+ }
+
+ /* MSB of each alarm register is an enable bit */
+ tm.tm_sec = bcd2bin(regs[ISL1219_REG_SCT - ISL1219_REG_SCT] & 0x7f);
+ tm.tm_min = bcd2bin(regs[ISL1219_REG_MNT - ISL1219_REG_SCT] & 0x7f);
+ tm.tm_hour = bcd2bin(regs[ISL1219_REG_HRT - ISL1219_REG_SCT] & 0x3f);
+ tm.tm_mday = bcd2bin(regs[ISL1219_REG_DTT - ISL1219_REG_SCT] & 0x3f);
+ tm.tm_mon =
+ bcd2bin(regs[ISL1219_REG_MOT - ISL1219_REG_SCT] & 0x1f) - 1;
+ tm.tm_year = bcd2bin(regs[ISL1219_REG_YRT - ISL1219_REG_SCT]) + 100;
+
+ sr = rtc_valid_tm(&tm);
+ if (sr)
+ return sr;
+
+ return sprintf(buf, "%llu\n",
+ (unsigned long long)rtc_tm_to_time64(&tm));
+};
+
+static DEVICE_ATTR_RW(timestamp0);
+
static irqreturn_t
isl1208_rtc_interrupt(int irq, void *data)
{
@@ -538,6 +626,13 @@ isl1208_rtc_interrupt(int irq, void *data)
return err;
}
+ if (sr & ISL1208_REG_SR_EVT) {
+ sysfs_notify(&rtc->dev.kobj, NULL,
+ dev_attr_timestamp0.attr.name);
+ dev_warn(&client->dev, "event detected");
+ handled = 1;
+ }
+
return handled ? IRQ_HANDLED : IRQ_NONE;
}
@@ -623,11 +718,39 @@ static const struct attribute_group isl1208_rtc_sysfs_files = {
.attrs = isl1208_rtc_attrs,
};
+static struct attribute *isl1219_rtc_attrs[] = {
+ &dev_attr_timestamp0.attr,
+ NULL
+};
+
+static const struct attribute_group isl1219_rtc_sysfs_files = {
+ .attrs = isl1219_rtc_attrs,
+};
+
+static int isl1208_setup_irq(struct i2c_client *client, int irq)
+{
+ int rc = devm_request_threaded_irq(&client->dev, irq, NULL,
+ isl1208_rtc_interrupt,
+ IRQF_SHARED | IRQF_ONESHOT,
+ isl1208_driver.driver.name,
+ client);
+ if (!rc) {
+ device_init_wakeup(&client->dev, 1);
+ enable_irq_wake(irq);
+ } else {
+ dev_err(&client->dev,
+ "Unable to request irq %d, no alarm support\n",
+ irq);
+ }
+ return rc;
+}
+
static int
isl1208_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
int rc = 0;
struct rtc_device *rtc;
+ int evdet_irq = -1;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
return -ENODEV;
@@ -642,6 +765,7 @@ 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) {
@@ -653,26 +777,46 @@ isl1208_probe(struct i2c_client *client, const struct i2c_device_id *id)
dev_warn(&client->dev, "rtc power failure detected, "
"please set clock.\n");
+ if (id->driver_data == TYPE_ISL1219) {
+ struct device_node *np = client->dev.of_node;
+ u32 evienb;
+
+ rc = i2c_smbus_read_byte_data(client, ISL1219_REG_EV);
+ if (rc < 0) {
+ dev_err(&client->dev, "failed to read EV reg\n");
+ return rc;
+ }
+ rc |= ISL1219_REG_EV_EVEN;
+ if (!of_property_read_u32(np, "isil,ev-evienb", &evienb)) {
+ if (evienb)
+ rc |= ISL1219_REG_EV_EVIENB;
+ else
+ rc &= ~ISL1219_REG_EV_EVIENB;
+ }
+ rc = i2c_smbus_write_byte_data(client, ISL1219_REG_EV, rc);
+ if (rc < 0) {
+ dev_err(&client->dev, "could not enable tamper detection\n");
+ return rc;
+ }
+ rc = rtc_add_group(rtc, &isl1219_rtc_sysfs_files);
+ if (rc)
+ return rc;
+ evdet_irq = of_irq_get_byname(np, "evdet");
+ }
+
rc = sysfs_create_group(&client->dev.kobj, &isl1208_rtc_sysfs_files);
if (rc)
return rc;
- if (client->irq > 0) {
- rc = devm_request_threaded_irq(&client->dev, client->irq, NULL,
- isl1208_rtc_interrupt,
- IRQF_SHARED | IRQF_ONESHOT,
- isl1208_driver.driver.name,
- client);
- if (!rc) {
- device_init_wakeup(&client->dev, 1);
- enable_irq_wake(client->irq);
- } else {
- dev_err(&client->dev,
- "Unable to request irq %d, no alarm support\n",
- client->irq);
- client->irq = 0;
- }
- }
+ if (client->irq > 0)
+ rc = isl1208_setup_irq(client, client->irq);
+ if (rc)
+ return rc;
+
+ if (evdet_irq > 0 && evdet_irq != client->irq)
+ rc = isl1208_setup_irq(client, evdet_irq);
+ if (rc)
+ return rc;
return rtc_register_device(rtc);
}
@@ -686,8 +830,9 @@ isl1208_remove(struct i2c_client *client)
}
static const struct i2c_device_id isl1208_id[] = {
- { "isl1208", 0 },
- { "isl1218", 0 },
+ { "isl1208", TYPE_ISL1208 },
+ { "isl1218", TYPE_ISL1218 },
+ { "isl1219", TYPE_ISL1219 },
{ }
};
MODULE_DEVICE_TABLE(i2c, isl1208_id);
@@ -695,6 +840,7 @@ MODULE_DEVICE_TABLE(i2c, isl1208_id);
static const struct of_device_id isl1208_of_match[] = {
{ .compatible = "isil,isl1208" },
{ .compatible = "isil,isl1218" },
+ { .compatible = "isil,isl1219" },
{ }
};
MODULE_DEVICE_TABLE(of, isl1208_of_match);
diff --git a/drivers/rtc/rtc-m48t59.c b/drivers/rtc/rtc-m48t59.c
index 1053a406b3aa..ac9ca1042889 100644
--- a/drivers/rtc/rtc-m48t59.c
+++ b/drivers/rtc/rtc-m48t59.c
@@ -373,7 +373,6 @@ static int m48t59_rtc_probe(struct platform_device *pdev)
struct m48t59_private *m48t59 = NULL;
struct resource *res;
int ret = -ENOMEM;
- char *name;
const struct rtc_class_ops *ops;
struct nvmem_config nvmem_cfg = {
.name = "m48t59-",
@@ -448,17 +447,14 @@ static int m48t59_rtc_probe(struct platform_device *pdev)
}
switch (pdata->type) {
case M48T59RTC_TYPE_M48T59:
- name = "m48t59";
ops = &m48t59_rtc_ops;
pdata->offset = 0x1ff0;
break;
case M48T59RTC_TYPE_M48T02:
- name = "m48t02";
ops = &m48t02_rtc_ops;
pdata->offset = 0x7f0;
break;
case M48T59RTC_TYPE_M48T08:
- name = "m48t08";
ops = &m48t02_rtc_ops;
pdata->offset = 0x1ff0;
break;
diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c
index cefde273fae6..8a60900d6b8b 100644
--- a/drivers/rtc/rtc-max77686.c
+++ b/drivers/rtc/rtc-max77686.c
@@ -1,16 +1,10 @@
-/*
- * RTC driver for Maxim MAX77686 and MAX77802
- *
- * Copyright (C) 2012 Samsung Electronics Co.Ltd
- *
- * based on rtc-max8997.c
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- */
+// SPDX-License-Identifier: GPL-2.0+
+//
+// RTC driver for Maxim MAX77686 and MAX77802
+//
+// Copyright (C) 2012 Samsung Electronics Co.Ltd
+//
+// based on rtc-max8997.c
#include <linux/i2c.h>
#include <linux/slab.h>
diff --git a/drivers/rtc/rtc-max8997.c b/drivers/rtc/rtc-max8997.c
index e8cee123e8aa..08c661a332ec 100644
--- a/drivers/rtc/rtc-max8997.c
+++ b/drivers/rtc/rtc-max8997.c
@@ -1,16 +1,10 @@
-/*
- * RTC driver for Maxim MAX8997
- *
- * Copyright (C) 2013 Samsung Electronics Co.Ltd
- *
- * based on rtc-max8998.c
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- */
+// SPDX-License-Identifier: GPL-2.0+
+//
+// RTC driver for Maxim MAX8997
+//
+// Copyright (C) 2013 Samsung Electronics Co.Ltd
+//
+// based on rtc-max8998.c
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
diff --git a/drivers/rtc/rtc-max8998.c b/drivers/rtc/rtc-max8998.c
index d8c0f9b3f87d..c873b4509b3c 100644
--- a/drivers/rtc/rtc-max8998.c
+++ b/drivers/rtc/rtc-max8998.c
@@ -1,16 +1,10 @@
-/*
- * RTC driver for Maxim MAX8998
- *
- * Copyright (C) 2010 Samsung Electronics Co.Ltd
- * Author: Minkyu Kang <mk7.kang@samsung.com>
- * Author: Joonyoung Shim <jy0922.shim@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- */
+// SPDX-License-Identifier: GPL-2.0+
+//
+// RTC driver for Maxim MAX8998
+//
+// Copyright (C) 2010 Samsung Electronics Co.Ltd
+// Author: Minkyu Kang <mk7.kang@samsung.com>
+// Author: Joonyoung Shim <jy0922.shim@samsung.com>
#include <linux/module.h>
#include <linux/i2c.h>
diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index 39086398833e..323ff55cc165 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -449,6 +449,7 @@ static void omap_rtc_power_off(void)
if (tm2bcd(&tm) < 0) {
dev_err(&rtc->rtc->dev, "power off failed\n");
+ rtc->type->lock(rtc);
return;
}
@@ -582,9 +583,7 @@ static int rtc_pinconf_get(struct pinctrl_dev *pctldev,
u32 val;
u16 arg = 0;
- rtc->type->unlock(rtc);
val = rtc_readl(rtc, OMAP_RTC_PMIC_REG);
- rtc->type->lock(rtc);
switch (param) {
case PIN_CONFIG_INPUT_ENABLE:
@@ -614,9 +613,7 @@ static int rtc_pinconf_set(struct pinctrl_dev *pctldev,
u32 param_val;
int i;
- rtc->type->unlock(rtc);
val = rtc_readl(rtc, OMAP_RTC_PMIC_REG);
- rtc->type->lock(rtc);
/* active low by default */
val |= OMAP_RTC_PMIC_EXT_WKUP_POL(pin);
@@ -861,13 +858,6 @@ static int omap_rtc_probe(struct platform_device *pdev)
goto err;
}
- if (rtc->is_pmic_controller) {
- if (!pm_power_off) {
- omap_rtc_power_off_rtc = rtc;
- pm_power_off = omap_rtc_power_off;
- }
- }
-
/* Support ext_wakeup pinconf */
rtc_pinctrl_desc.name = dev_name(&pdev->dev);
@@ -880,12 +870,21 @@ static int omap_rtc_probe(struct platform_device *pdev)
ret = rtc_register_device(rtc->rtc);
if (ret)
- goto err;
+ goto err_deregister_pinctrl;
rtc_nvmem_register(rtc->rtc, &omap_rtc_nvmem_config);
+ if (rtc->is_pmic_controller) {
+ if (!pm_power_off) {
+ omap_rtc_power_off_rtc = rtc;
+ pm_power_off = omap_rtc_power_off;
+ }
+ }
+
return 0;
+err_deregister_pinctrl:
+ pinctrl_unregister(rtc->pctldev);
err:
clk_disable_unprepare(rtc->clk);
device_init_wakeup(&pdev->dev, false);
diff --git a/drivers/rtc/rtc-pcf2127.c b/drivers/rtc/rtc-pcf2127.c
index e83be1852c2f..9f99a0966550 100644
--- a/drivers/rtc/rtc-pcf2127.c
+++ b/drivers/rtc/rtc-pcf2127.c
@@ -36,6 +36,11 @@
#define PCF2127_REG_MO (0x08)
#define PCF2127_REG_YR (0x09)
+/* the pcf2127 has 512 bytes nvmem, pcf2129 doesn't */
+#define PCF2127_REG_RAM_addr_MSB 0x1a
+#define PCF2127_REG_RAM_wrt_cmd 0x1c
+#define PCF2127_REG_RAM_rd_cmd 0x1d
+
#define PCF2127_OSF BIT(7) /* Oscillator Fail flag */
struct pcf2127 {
@@ -183,10 +188,47 @@ static const struct rtc_class_ops pcf2127_rtc_ops = {
.set_time = pcf2127_rtc_set_time,
};
+static int pcf2127_nvmem_read(void *priv, unsigned int offset,
+ void *val, size_t bytes)
+{
+ struct pcf2127 *pcf2127 = priv;
+ int ret;
+ unsigned char offsetbuf[] = { offset >> 8, offset };
+
+ ret = regmap_bulk_write(pcf2127->regmap, PCF2127_REG_RAM_addr_MSB,
+ offsetbuf, 2);
+ if (ret)
+ return ret;
+
+ ret = regmap_bulk_read(pcf2127->regmap, PCF2127_REG_RAM_rd_cmd,
+ val, bytes);
+
+ return ret ?: bytes;
+}
+
+static int pcf2127_nvmem_write(void *priv, unsigned int offset,
+ void *val, size_t bytes)
+{
+ struct pcf2127 *pcf2127 = priv;
+ int ret;
+ unsigned char offsetbuf[] = { offset >> 8, offset };
+
+ ret = regmap_bulk_write(pcf2127->regmap, PCF2127_REG_RAM_addr_MSB,
+ offsetbuf, 2);
+ if (ret)
+ return ret;
+
+ ret = regmap_bulk_write(pcf2127->regmap, PCF2127_REG_RAM_wrt_cmd,
+ val, bytes);
+
+ return ret ?: bytes;
+}
+
static int pcf2127_probe(struct device *dev, struct regmap *regmap,
- const char *name)
+ const char *name, bool has_nvmem)
{
struct pcf2127 *pcf2127;
+ int ret = 0;
dev_dbg(dev, "%s\n", __func__);
@@ -200,8 +242,21 @@ static int pcf2127_probe(struct device *dev, struct regmap *regmap,
pcf2127->rtc = devm_rtc_device_register(dev, name, &pcf2127_rtc_ops,
THIS_MODULE);
+ if (IS_ERR(pcf2127->rtc))
+ return PTR_ERR(pcf2127->rtc);
+
+ if (has_nvmem) {
+ struct nvmem_config nvmem_cfg = {
+ .priv = pcf2127,
+ .reg_read = pcf2127_nvmem_read,
+ .reg_write = pcf2127_nvmem_write,
+ .size = 512,
+ };
+
+ ret = rtc_nvmem_register(pcf2127->rtc, &nvmem_cfg);
+ }
- return PTR_ERR_OR_ZERO(pcf2127->rtc);
+ return ret;
}
#ifdef CONFIG_OF
@@ -309,11 +364,11 @@ static int pcf2127_i2c_probe(struct i2c_client *client,
}
return pcf2127_probe(&client->dev, regmap,
- pcf2127_i2c_driver.driver.name);
+ pcf2127_i2c_driver.driver.name, id->driver_data);
}
static const struct i2c_device_id pcf2127_i2c_id[] = {
- { "pcf2127", 0 },
+ { "pcf2127", 1 },
{ "pcf2129", 0 },
{ }
};
@@ -372,11 +427,12 @@ static int pcf2127_spi_probe(struct spi_device *spi)
return PTR_ERR(regmap);
}
- return pcf2127_probe(&spi->dev, regmap, pcf2127_spi_driver.driver.name);
+ return pcf2127_probe(&spi->dev, regmap, pcf2127_spi_driver.driver.name,
+ spi_get_device_id(spi)->driver_data);
}
static const struct spi_device_id pcf2127_spi_id[] = {
- { "pcf2127", 0 },
+ { "pcf2127", 1 },
{ "pcf2129", 0 },
{ }
};
diff --git a/drivers/rtc/rtc-pcf85063.c b/drivers/rtc/rtc-pcf85063.c
index 49bcbb3d4a69..283c2335b01b 100644
--- a/drivers/rtc/rtc-pcf85063.c
+++ b/drivers/rtc/rtc-pcf85063.c
@@ -43,37 +43,38 @@ static struct i2c_driver pcf85063_driver;
static int pcf85063_stop_clock(struct i2c_client *client, u8 *ctrl1)
{
- s32 ret;
+ int rc;
+ u8 reg;
- ret = i2c_smbus_read_byte_data(client, PCF85063_REG_CTRL1);
- if (ret < 0) {
+ rc = i2c_smbus_read_byte_data(client, PCF85063_REG_CTRL1);
+ if (rc < 0) {
dev_err(&client->dev, "Failing to stop the clock\n");
return -EIO;
}
/* stop the clock */
- ret |= PCF85063_REG_CTRL1_STOP;
+ reg = rc | PCF85063_REG_CTRL1_STOP;
- ret = i2c_smbus_write_byte_data(client, PCF85063_REG_CTRL1, ret);
- if (ret < 0) {
+ rc = i2c_smbus_write_byte_data(client, PCF85063_REG_CTRL1, reg);
+ if (rc < 0) {
dev_err(&client->dev, "Failing to stop the clock\n");
return -EIO;
}
- *ctrl1 = ret;
+ *ctrl1 = reg;
return 0;
}
static int pcf85063_start_clock(struct i2c_client *client, u8 ctrl1)
{
- s32 ret;
+ int rc;
/* start the clock */
ctrl1 &= ~PCF85063_REG_CTRL1_STOP;
- ret = i2c_smbus_write_byte_data(client, PCF85063_REG_CTRL1, ctrl1);
- if (ret < 0) {
+ rc = i2c_smbus_write_byte_data(client, PCF85063_REG_CTRL1, ctrl1);
+ if (rc < 0) {
dev_err(&client->dev, "Failing to start the clock\n");
return -EIO;
}
diff --git a/drivers/rtc/rtc-s5m.c b/drivers/rtc/rtc-s5m.c
index 8428455432ca..6495f84f7428 100644
--- a/drivers/rtc/rtc-s5m.c
+++ b/drivers/rtc/rtc-s5m.c
@@ -1,19 +1,9 @@
-/*
- * Copyright (c) 2013-2014 Samsung Electronics Co., Ltd
- * http://www.samsung.com
- *
- * Copyright (C) 2013 Google, Inc
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * 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.
- */
+// SPDX-License-Identifier: GPL-2.0+
+//
+// Copyright (c) 2013-2014 Samsung Electronics Co., Ltd
+// http://www.samsung.com
+//
+// Copyright (C) 2013 Google, Inc
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
diff --git a/drivers/rtc/rtc-sa1100.c b/drivers/rtc/rtc-sa1100.c
index ed71d1113627..304d905cb23f 100644
--- a/drivers/rtc/rtc-sa1100.c
+++ b/drivers/rtc/rtc-sa1100.c
@@ -224,7 +224,6 @@ 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().
diff --git a/drivers/rtc/rtc-sh.c b/drivers/rtc/rtc-sh.c
index 776b70a14e03..51ba414798a8 100644
--- a/drivers/rtc/rtc-sh.c
+++ b/drivers/rtc/rtc-sh.c
@@ -143,8 +143,6 @@ static int __sh_rtc_alarm(struct sh_rtc *rtc)
static int __sh_rtc_periodic(struct sh_rtc *rtc)
{
- struct rtc_device *rtc_dev = rtc->rtc_dev;
- struct rtc_task *irq_task;
unsigned int tmp, pending;
tmp = readb(rtc->regbase + RCR2);
@@ -161,14 +159,7 @@ static int __sh_rtc_periodic(struct sh_rtc *rtc)
else {
if (rtc->periodic_freq & PF_HP)
rtc->periodic_freq |= PF_COUNT;
- if (rtc->periodic_freq & PF_KOU) {
- spin_lock(&rtc_dev->irq_task_lock);
- irq_task = rtc_dev->irq_task;
- if (irq_task)
- irq_task->func(irq_task->private_data);
- spin_unlock(&rtc_dev->irq_task_lock);
- } else
- rtc_update_irq(rtc->rtc_dev, 1, RTC_PF | RTC_IRQF);
+ rtc_update_irq(rtc->rtc_dev, 1, RTC_PF | RTC_IRQF);
}
return pending;
@@ -224,81 +215,6 @@ static irqreturn_t sh_rtc_shared(int irq, void *dev_id)
return IRQ_RETVAL(ret);
}
-static int sh_rtc_irq_set_state(struct device *dev, int enable)
-{
- struct sh_rtc *rtc = dev_get_drvdata(dev);
- unsigned int tmp;
-
- spin_lock_irq(&rtc->lock);
-
- tmp = readb(rtc->regbase + RCR2);
-
- if (enable) {
- rtc->periodic_freq |= PF_KOU;
- tmp &= ~RCR2_PEF; /* Clear PES bit */
- tmp |= (rtc->periodic_freq & ~PF_HP); /* Set PES2-0 */
- } else {
- rtc->periodic_freq &= ~PF_KOU;
- tmp &= ~(RCR2_PESMASK | RCR2_PEF);
- }
-
- writeb(tmp, rtc->regbase + RCR2);
-
- spin_unlock_irq(&rtc->lock);
-
- return 0;
-}
-
-static int sh_rtc_irq_set_freq(struct device *dev, int freq)
-{
- struct sh_rtc *rtc = dev_get_drvdata(dev);
- int tmp, ret = 0;
-
- spin_lock_irq(&rtc->lock);
- tmp = rtc->periodic_freq & PF_MASK;
-
- switch (freq) {
- case 0:
- rtc->periodic_freq = 0x00;
- break;
- case 1:
- rtc->periodic_freq = 0x60;
- break;
- case 2:
- rtc->periodic_freq = 0x50;
- break;
- case 4:
- rtc->periodic_freq = 0x40;
- break;
- case 8:
- rtc->periodic_freq = 0x30 | PF_HP;
- break;
- case 16:
- rtc->periodic_freq = 0x30;
- break;
- case 32:
- rtc->periodic_freq = 0x20 | PF_HP;
- break;
- case 64:
- rtc->periodic_freq = 0x20;
- break;
- case 128:
- rtc->periodic_freq = 0x10 | PF_HP;
- break;
- case 256:
- rtc->periodic_freq = 0x10;
- break;
- default:
- ret = -ENOTSUPP;
- }
-
- if (ret == 0)
- rtc->periodic_freq |= tmp;
-
- spin_unlock_irq(&rtc->lock);
- return ret;
-}
-
static inline void sh_rtc_setaie(struct device *dev, unsigned int enable)
{
struct sh_rtc *rtc = dev_get_drvdata(dev);
@@ -675,8 +591,6 @@ static int __init sh_rtc_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, rtc);
/* everything disabled by default */
- sh_rtc_irq_set_freq(&pdev->dev, 0);
- sh_rtc_irq_set_state(&pdev->dev, 0);
sh_rtc_setaie(&pdev->dev, 0);
sh_rtc_setcie(&pdev->dev, 0);
@@ -708,8 +622,6 @@ static int __exit sh_rtc_remove(struct platform_device *pdev)
{
struct sh_rtc *rtc = platform_get_drvdata(pdev);
- sh_rtc_irq_set_state(&pdev->dev, 0);
-
sh_rtc_setaie(&pdev->dev, 0);
sh_rtc_setcie(&pdev->dev, 0);
diff --git a/drivers/rtc/rtc-snvs.c b/drivers/rtc/rtc-snvs.c
index 8a75cc3af6e7..b2483a749ac4 100644
--- a/drivers/rtc/rtc-snvs.c
+++ b/drivers/rtc/rtc-snvs.c
@@ -40,49 +40,83 @@ struct snvs_rtc_data {
struct clk *clk;
};
+/* Read 64 bit timer register, which could be in inconsistent state */
+static u64 rtc_read_lpsrt(struct snvs_rtc_data *data)
+{
+ u32 msb, lsb;
+
+ regmap_read(data->regmap, data->offset + SNVS_LPSRTCMR, &msb);
+ regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &lsb);
+ return (u64)msb << 32 | lsb;
+}
+
+/* Read the secure real time counter, taking care to deal with the cases of the
+ * counter updating while being read.
+ */
static u32 rtc_read_lp_counter(struct snvs_rtc_data *data)
{
u64 read1, read2;
- u32 val;
+ unsigned int timeout = 100;
+ /* As expected, the registers might update between the read of the LSB
+ * reg and the MSB reg. It's also possible that one register might be
+ * in partially modified state as well.
+ */
+ read1 = rtc_read_lpsrt(data);
do {
- regmap_read(data->regmap, data->offset + SNVS_LPSRTCMR, &val);
- read1 = val;
- read1 <<= 32;
- regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &val);
- read1 |= val;
-
- regmap_read(data->regmap, data->offset + SNVS_LPSRTCMR, &val);
- read2 = val;
- read2 <<= 32;
- regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &val);
- read2 |= val;
- } while (read1 != read2);
+ read2 = read1;
+ read1 = rtc_read_lpsrt(data);
+ } while (read1 != read2 && --timeout);
+ if (!timeout)
+ dev_err(&data->rtc->dev, "Timeout trying to get valid LPSRT Counter read\n");
/* Convert 47-bit counter to 32-bit raw second count */
return (u32) (read1 >> CNTR_TO_SECS_SH);
}
-static void rtc_write_sync_lp(struct snvs_rtc_data *data)
+/* Just read the lsb from the counter, dealing with inconsistent state */
+static int rtc_read_lp_counter_lsb(struct snvs_rtc_data *data, u32 *lsb)
+{
+ u32 count1, count2;
+ unsigned int timeout = 100;
+
+ regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &count1);
+ do {
+ count2 = count1;
+ regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &count1);
+ } while (count1 != count2 && --timeout);
+ if (!timeout) {
+ dev_err(&data->rtc->dev, "Timeout trying to get valid LPSRT Counter read\n");
+ return -ETIMEDOUT;
+ }
+
+ *lsb = count1;
+ return 0;
+}
+
+static int rtc_write_sync_lp(struct snvs_rtc_data *data)
{
- u32 count1, count2, count3;
- int i;
-
- /* Wait for 3 CKIL cycles */
- for (i = 0; i < 3; i++) {
- do {
- regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &count1);
- regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &count2);
- } while (count1 != count2);
-
- /* Now wait until counter value changes */
- do {
- do {
- regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &count2);
- regmap_read(data->regmap, data->offset + SNVS_LPSRTCLR, &count3);
- } while (count2 != count3);
- } while (count3 == count1);
+ u32 count1, count2;
+ u32 elapsed;
+ unsigned int timeout = 1000;
+ int ret;
+
+ ret = rtc_read_lp_counter_lsb(data, &count1);
+ if (ret)
+ return ret;
+
+ /* Wait for 3 CKIL cycles, about 61.0-91.5 µs */
+ do {
+ ret = rtc_read_lp_counter_lsb(data, &count2);
+ if (ret)
+ return ret;
+ elapsed = count2 - count1; /* wrap around _is_ handled! */
+ } while (elapsed < 3 && --timeout);
+ if (!timeout) {
+ dev_err(&data->rtc->dev, "Timeout waiting for LPSRT Counter to change\n");
+ return -ETIMEDOUT;
}
+ return 0;
}
static int snvs_rtc_enable(struct snvs_rtc_data *data, bool enable)
@@ -166,9 +200,7 @@ static int snvs_rtc_alarm_irq_enable(struct device *dev, unsigned int enable)
(SNVS_LPCR_LPTA_EN | SNVS_LPCR_LPWUI_EN),
enable ? (SNVS_LPCR_LPTA_EN | SNVS_LPCR_LPWUI_EN) : 0);
- rtc_write_sync_lp(data);
-
- return 0;
+ return rtc_write_sync_lp(data);
}
static int snvs_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
@@ -176,11 +208,14 @@ static int snvs_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
struct snvs_rtc_data *data = dev_get_drvdata(dev);
struct rtc_time *alrm_tm = &alrm->time;
unsigned long time;
+ int ret;
rtc_tm_to_time(alrm_tm, &time);
regmap_update_bits(data->regmap, data->offset + SNVS_LPCR, SNVS_LPCR_LPTA_EN, 0);
- rtc_write_sync_lp(data);
+ ret = rtc_write_sync_lp(data);
+ if (ret)
+ return ret;
regmap_write(data->regmap, data->offset + SNVS_LPTAR, time);
/* Clear alarm interrupt status bit */
diff --git a/drivers/rtc/rtc-stmp3xxx.c b/drivers/rtc/rtc-stmp3xxx.c
index d578e40d5a50..b76318fd5bb0 100644
--- a/drivers/rtc/rtc-stmp3xxx.c
+++ b/drivers/rtc/rtc-stmp3xxx.c
@@ -288,10 +288,22 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, rtc_data);
- err = stmp_reset_block(rtc_data->io);
- if (err) {
- dev_err(&pdev->dev, "stmp_reset_block failed: %d\n", err);
- return err;
+ /*
+ * Resetting the rtc stops the watchdog timer that is potentially
+ * running. So (assuming it is running on purpose) don't reset if the
+ * watchdog is enabled.
+ */
+ if (readl(rtc_data->io + STMP3XXX_RTC_CTRL) &
+ STMP3XXX_RTC_CTRL_WATCHDOGEN) {
+ dev_info(&pdev->dev,
+ "Watchdog is running, skip resetting rtc\n");
+ } else {
+ err = stmp_reset_block(rtc_data->io);
+ if (err) {
+ dev_err(&pdev->dev, "stmp_reset_block failed: %d\n",
+ err);
+ return err;
+ }
}
/*
diff --git a/drivers/rtc/rtc-sysfs.c b/drivers/rtc/rtc-sysfs.c
index 454da38c6012..f1ff30ade534 100644
--- a/drivers/rtc/rtc-sysfs.c
+++ b/drivers/rtc/rtc-sysfs.c
@@ -317,3 +317,46 @@ const struct attribute_group **rtc_get_dev_attribute_groups(void)
{
return rtc_attr_groups;
}
+
+int rtc_add_groups(struct rtc_device *rtc, const struct attribute_group **grps)
+{
+ size_t old_cnt = 0, add_cnt = 0, new_cnt;
+ const struct attribute_group **groups, **old;
+
+ if (rtc->registered)
+ return -EINVAL;
+ if (!grps)
+ return -EINVAL;
+
+ groups = rtc->dev.groups;
+ if (groups)
+ for (; *groups; groups++)
+ old_cnt++;
+
+ for (groups = grps; *groups; groups++)
+ add_cnt++;
+
+ 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);
+ memcpy(groups, rtc->dev.groups, old_cnt * sizeof(*groups));
+ memcpy(groups + old_cnt, grps, add_cnt * sizeof(*groups));
+ groups[old_cnt + add_cnt] = NULL;
+
+ old = rtc->dev.groups;
+ rtc->dev.groups = groups;
+ if (old && old != rtc_attr_groups)
+ devm_kfree(&rtc->dev, old);
+
+ return 0;
+}
+EXPORT_SYMBOL(rtc_add_groups);
+
+int rtc_add_group(struct rtc_device *rtc, const struct attribute_group *grp)
+{
+ const struct attribute_group *groups[] = { grp, NULL };
+
+ return rtc_add_groups(rtc, groups);
+}
+EXPORT_SYMBOL(rtc_add_group);
diff --git a/drivers/rtc/rtc-test.c b/drivers/rtc/rtc-test.c
index 8469256edc2a..ade6a82709be 100644
--- a/drivers/rtc/rtc-test.c
+++ b/drivers/rtc/rtc-test.c
@@ -22,7 +22,7 @@ struct rtc_test_data {
bool alarm_en;
};
-struct platform_device *pdev[MAX_RTC_TEST];
+static struct platform_device *pdev[MAX_RTC_TEST];
static int test_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{