summaryrefslogtreecommitdiffstats
path: root/drivers/rtc
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/rtc')
-rw-r--r--drivers/rtc/Kconfig2
-rw-r--r--drivers/rtc/rtc-at91rm9200.c2
-rw-r--r--drivers/rtc/rtc-at91sam9.c4
-rw-r--r--drivers/rtc/rtc-bfin.c153
-rw-r--r--drivers/rtc/rtc-dev.c17
-rw-r--r--drivers/rtc/rtc-ds1374.c10
-rw-r--r--drivers/rtc/rtc-ep93xx.c2
-rw-r--r--drivers/rtc/rtc-isl1208.c2
-rw-r--r--drivers/rtc/rtc-max6902.c2
-rw-r--r--drivers/rtc/rtc-r9701.c1
-rw-r--r--drivers/rtc/rtc-s3c.c2
-rw-r--r--drivers/rtc/rtc-sa1100.c4
12 files changed, 98 insertions, 103 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 90ab73825401..9a9755c92fad 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -561,7 +561,7 @@ config RTC_DRV_AT91SAM9_GPBR
config RTC_DRV_BFIN
tristate "Blackfin On-Chip RTC"
- depends on BLACKFIN
+ depends on BLACKFIN && !BF561
help
If you say yes here you will get support for the
Blackfin On-Chip Real Time Clock.
diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c
index cd32d05db773..4e888cc8be5b 100644
--- a/drivers/rtc/rtc-at91rm9200.c
+++ b/drivers/rtc/rtc-at91rm9200.c
@@ -29,7 +29,7 @@
#include <linux/completion.h>
#include <asm/uaccess.h>
-#include <asm/arch/at91_rtc.h>
+#include <mach/at91_rtc.h>
#define AT91_RTC_FREQ 1
diff --git a/drivers/rtc/rtc-at91sam9.c b/drivers/rtc/rtc-at91sam9.c
index f0246ef413a4..2133f37906f2 100644
--- a/drivers/rtc/rtc-at91sam9.c
+++ b/drivers/rtc/rtc-at91sam9.c
@@ -19,8 +19,8 @@
#include <linux/interrupt.h>
#include <linux/ioctl.h>
-#include <asm/arch/board.h>
-#include <asm/arch/at91_rtt.h>
+#include <mach/board.h>
+#include <mach/at91_rtt.h>
/*
diff --git a/drivers/rtc/rtc-bfin.c b/drivers/rtc/rtc-bfin.c
index 8624f55d0560..34439ce3967e 100644
--- a/drivers/rtc/rtc-bfin.c
+++ b/drivers/rtc/rtc-bfin.c
@@ -2,7 +2,7 @@
* Blackfin On-Chip Real Time Clock Driver
* Supports BF52[257]/BF53[123]/BF53[467]/BF54[24789]
*
- * Copyright 2004-2007 Analog Devices Inc.
+ * Copyright 2004-2008 Analog Devices Inc.
*
* Enter bugs at http://blackfin.uclinux.org/
*
@@ -32,6 +32,15 @@
* writes to clear status registers complete immediately.
*/
+/* It may seem odd that there is no SWCNT code in here (which would be exposed
+ * via the periodic interrupt event, or PIE). Since the Blackfin RTC peripheral
+ * runs in units of seconds (N/HZ) but the Linux framework runs in units of HZ
+ * (2^N HZ), there is no point in keeping code that only provides 1 HZ PIEs.
+ * The same exact behavior can be accomplished by using the update interrupt
+ * event (UIE). Maybe down the line the RTC peripheral will suck less in which
+ * case we can re-introduce PIE support.
+ */
+
#include <linux/bcd.h>
#include <linux/completion.h>
#include <linux/delay.h>
@@ -144,14 +153,13 @@ static void bfin_rtc_sync_pending(struct device *dev)
* Initialize the RTC. Enable pre-scaler to scale RTC clock
* to 1Hz and clear interrupt/status registers.
*/
-static void bfin_rtc_reset(struct device *dev)
+static void bfin_rtc_reset(struct device *dev, u16 rtc_ictl)
{
struct bfin_rtc *rtc = dev_get_drvdata(dev);
dev_dbg_stamp(dev);
bfin_rtc_sync_pending(dev);
bfin_write_RTC_PREN(0x1);
- bfin_write_RTC_ICTL(RTC_ISTAT_WRITE_COMPLETE);
- bfin_write_RTC_SWCNT(0);
+ bfin_write_RTC_ICTL(rtc_ictl);
bfin_write_RTC_ALARM(0);
bfin_write_RTC_ISTAT(0xFFFF);
rtc->rtc_wrote_regs = 0;
@@ -194,14 +202,6 @@ static irqreturn_t bfin_rtc_interrupt(int irq, void *dev_id)
}
}
- if (rtc_ictl & RTC_ISTAT_STOPWATCH) {
- if (rtc_istat & RTC_ISTAT_STOPWATCH) {
- bfin_write_RTC_ISTAT(RTC_ISTAT_STOPWATCH);
- events |= RTC_PF | RTC_IRQF;
- bfin_write_RTC_SWCNT(rtc->rtc_dev->irq_freq);
- }
- }
-
if (rtc_ictl & RTC_ISTAT_SEC) {
if (rtc_istat & RTC_ISTAT_SEC) {
bfin_write_RTC_ISTAT(RTC_ISTAT_SEC);
@@ -218,32 +218,12 @@ static irqreturn_t bfin_rtc_interrupt(int irq, void *dev_id)
return IRQ_NONE;
}
-static int bfin_rtc_open(struct device *dev)
-{
- int ret;
-
- dev_dbg_stamp(dev);
-
- ret = request_irq(IRQ_RTC, bfin_rtc_interrupt, IRQF_SHARED, to_platform_device(dev)->name, dev);
- if (!ret)
- bfin_rtc_reset(dev);
-
- return ret;
-}
-
-static void bfin_rtc_release(struct device *dev)
-{
- dev_dbg_stamp(dev);
- bfin_rtc_reset(dev);
- free_irq(IRQ_RTC, dev);
-}
-
-static void bfin_rtc_int_set(struct bfin_rtc *rtc, u16 rtc_int)
+static void bfin_rtc_int_set(u16 rtc_int)
{
bfin_write_RTC_ISTAT(rtc_int);
bfin_write_RTC_ICTL(bfin_read_RTC_ICTL() | rtc_int);
}
-static void bfin_rtc_int_clear(struct bfin_rtc *rtc, u16 rtc_int)
+static void bfin_rtc_int_clear(u16 rtc_int)
{
bfin_write_RTC_ICTL(bfin_read_RTC_ICTL() & rtc_int);
}
@@ -252,7 +232,7 @@ static void bfin_rtc_int_set_alarm(struct bfin_rtc *rtc)
/* Blackfin has different bits for whether the alarm is
* more than 24 hours away.
*/
- bfin_rtc_int_set(rtc, (rtc->rtc_alarm.tm_yday == -1 ? RTC_ISTAT_ALARM : RTC_ISTAT_ALARM_DAY));
+ bfin_rtc_int_set(rtc->rtc_alarm.tm_yday == -1 ? RTC_ISTAT_ALARM : RTC_ISTAT_ALARM_DAY);
}
static int bfin_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
{
@@ -264,23 +244,13 @@ static int bfin_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long ar
bfin_rtc_sync_pending(dev);
switch (cmd) {
- case RTC_PIE_ON:
- dev_dbg_stamp(dev);
- bfin_rtc_int_set(rtc, RTC_ISTAT_STOPWATCH);
- bfin_write_RTC_SWCNT(rtc->rtc_dev->irq_freq);
- break;
- case RTC_PIE_OFF:
- dev_dbg_stamp(dev);
- bfin_rtc_int_clear(rtc, ~RTC_ISTAT_STOPWATCH);
- break;
-
case RTC_UIE_ON:
dev_dbg_stamp(dev);
- bfin_rtc_int_set(rtc, RTC_ISTAT_SEC);
+ bfin_rtc_int_set(RTC_ISTAT_SEC);
break;
case RTC_UIE_OFF:
dev_dbg_stamp(dev);
- bfin_rtc_int_clear(rtc, ~RTC_ISTAT_SEC);
+ bfin_rtc_int_clear(~RTC_ISTAT_SEC);
break;
case RTC_AIE_ON:
@@ -289,7 +259,7 @@ static int bfin_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long ar
break;
case RTC_AIE_OFF:
dev_dbg_stamp(dev);
- bfin_rtc_int_clear(rtc, ~(RTC_ISTAT_ALARM | RTC_ISTAT_ALARM_DAY));
+ bfin_rtc_int_clear(~(RTC_ISTAT_ALARM | RTC_ISTAT_ALARM_DAY));
break;
default:
@@ -371,64 +341,64 @@ static int bfin_rtc_proc(struct device *dev, struct seq_file *seq)
seq_printf(seq,
"alarm_IRQ\t: %s\n"
"wkalarm_IRQ\t: %s\n"
- "seconds_IRQ\t: %s\n"
- "periodic_IRQ\t: %s\n",
+ "seconds_IRQ\t: %s\n",
yesno(ictl & RTC_ISTAT_ALARM),
yesno(ictl & RTC_ISTAT_ALARM_DAY),
- yesno(ictl & RTC_ISTAT_SEC),
- yesno(ictl & RTC_ISTAT_STOPWATCH));
+ yesno(ictl & RTC_ISTAT_SEC));
return 0;
#undef yesno
}
-/**
- * bfin_irq_set_freq - make sure hardware supports requested freq
- * @dev: pointer to RTC device structure
- * @freq: requested frequency rate
- *
- * The Blackfin RTC can only generate periodic events at 1 per
- * second (1 Hz), so reject any attempt at changing it.
- */
-static int bfin_irq_set_freq(struct device *dev, int freq)
-{
- dev_dbg_stamp(dev);
- return -ENOTTY;
-}
-
static struct rtc_class_ops bfin_rtc_ops = {
- .open = bfin_rtc_open,
- .release = bfin_rtc_release,
.ioctl = bfin_rtc_ioctl,
.read_time = bfin_rtc_read_time,
.set_time = bfin_rtc_set_time,
.read_alarm = bfin_rtc_read_alarm,
.set_alarm = bfin_rtc_set_alarm,
.proc = bfin_rtc_proc,
- .irq_set_freq = bfin_irq_set_freq,
};
static int __devinit bfin_rtc_probe(struct platform_device *pdev)
{
struct bfin_rtc *rtc;
+ struct device *dev = &pdev->dev;
int ret = 0;
+ unsigned long timeout;
- dev_dbg_stamp(&pdev->dev);
+ dev_dbg_stamp(dev);
+ /* Allocate memory for our RTC struct */
rtc = kzalloc(sizeof(*rtc), GFP_KERNEL);
if (unlikely(!rtc))
return -ENOMEM;
+ platform_set_drvdata(pdev, rtc);
+ device_init_wakeup(dev, 1);
- rtc->rtc_dev = rtc_device_register(pdev->name, &pdev->dev, &bfin_rtc_ops, THIS_MODULE);
- if (IS_ERR(rtc)) {
- ret = PTR_ERR(rtc->rtc_dev);
+ /* Grab the IRQ and init the hardware */
+ ret = request_irq(IRQ_RTC, bfin_rtc_interrupt, IRQF_SHARED, pdev->name, dev);
+ if (unlikely(ret))
goto err;
- }
- rtc->rtc_dev->irq_freq = 1;
+ /* sometimes the bootloader touched things, but the write complete was not
+ * enabled, so let's just do a quick timeout here since the IRQ will not fire ...
+ */
+ timeout = jiffies + HZ;
+ while (bfin_read_RTC_ISTAT() & RTC_ISTAT_WRITE_PENDING)
+ if (time_after(jiffies, timeout))
+ break;
+ bfin_rtc_reset(dev, RTC_ISTAT_WRITE_COMPLETE);
+ bfin_write_RTC_SWCNT(0);
- platform_set_drvdata(pdev, rtc);
+ /* Register our RTC with the RTC framework */
+ rtc->rtc_dev = rtc_device_register(pdev->name, dev, &bfin_rtc_ops, THIS_MODULE);
+ if (unlikely(IS_ERR(rtc))) {
+ ret = PTR_ERR(rtc->rtc_dev);
+ goto err_irq;
+ }
return 0;
+ err_irq:
+ free_irq(IRQ_RTC, dev);
err:
kfree(rtc);
return ret;
@@ -437,7 +407,10 @@ static int __devinit bfin_rtc_probe(struct platform_device *pdev)
static int __devexit bfin_rtc_remove(struct platform_device *pdev)
{
struct bfin_rtc *rtc = platform_get_drvdata(pdev);
+ struct device *dev = &pdev->dev;
+ bfin_rtc_reset(dev, 0);
+ free_irq(IRQ_RTC, dev);
rtc_device_unregister(rtc->rtc_dev);
platform_set_drvdata(pdev, NULL);
kfree(rtc);
@@ -445,6 +418,32 @@ static int __devexit bfin_rtc_remove(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM
+static int bfin_rtc_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ if (device_may_wakeup(&pdev->dev)) {
+ enable_irq_wake(IRQ_RTC);
+ bfin_rtc_sync_pending(&pdev->dev);
+ } else
+ bfin_rtc_int_clear(-1);
+
+ return 0;
+}
+
+static int bfin_rtc_resume(struct platform_device *pdev)
+{
+ if (device_may_wakeup(&pdev->dev))
+ disable_irq_wake(IRQ_RTC);
+ else
+ bfin_write_RTC_ISTAT(-1);
+
+ return 0;
+}
+#else
+# define bfin_rtc_suspend NULL
+# define bfin_rtc_resume NULL
+#endif
+
static struct platform_driver bfin_rtc_driver = {
.driver = {
.name = "rtc-bfin",
@@ -452,6 +451,8 @@ static struct platform_driver bfin_rtc_driver = {
},
.probe = bfin_rtc_probe,
.remove = __devexit_p(bfin_rtc_remove),
+ .suspend = bfin_rtc_suspend,
+ .resume = bfin_rtc_resume,
};
static int __init bfin_rtc_init(void)
diff --git a/drivers/rtc/rtc-dev.c b/drivers/rtc/rtc-dev.c
index 856cc1af40df..f118252f3a9f 100644
--- a/drivers/rtc/rtc-dev.c
+++ b/drivers/rtc/rtc-dev.c
@@ -13,7 +13,6 @@
#include <linux/module.h>
#include <linux/rtc.h>
-#include <linux/smp_lock.h>
#include "rtc-core.h"
static dev_t rtc_devt;
@@ -27,11 +26,8 @@ static int rtc_dev_open(struct inode *inode, struct file *file)
struct rtc_device, char_dev);
const struct rtc_class_ops *ops = rtc->ops;
- lock_kernel();
- if (test_and_set_bit_lock(RTC_DEV_BUSY, &rtc->flags)) {
- err = -EBUSY;
- goto out;
- }
+ if (test_and_set_bit_lock(RTC_DEV_BUSY, &rtc->flags))
+ return -EBUSY;
file->private_data = rtc;
@@ -41,13 +37,11 @@ static int rtc_dev_open(struct inode *inode, struct file *file)
rtc->irq_data = 0;
spin_unlock_irq(&rtc->irq_lock);
- goto out;
+ return 0;
}
/* something has gone wrong */
clear_bit_unlock(RTC_DEV_BUSY, &rtc->flags);
-out:
- unlock_kernel();
return err;
}
@@ -409,11 +403,14 @@ static long rtc_dev_ioctl(struct file *file,
#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL
case RTC_UIE_OFF:
+ mutex_unlock(&rtc->ops_lock);
clear_uie(rtc);
- break;
+ return 0;
case RTC_UIE_ON:
+ mutex_unlock(&rtc->ops_lock);
err = set_uie(rtc);
+ return err;
#endif
default:
err = -ENOTTY;
diff --git a/drivers/rtc/rtc-ds1374.c b/drivers/rtc/rtc-ds1374.c
index 640acd20fdde..a150418fba76 100644
--- a/drivers/rtc/rtc-ds1374.c
+++ b/drivers/rtc/rtc-ds1374.c
@@ -173,7 +173,7 @@ static int ds1374_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
int cr, sr;
int ret = 0;
- if (client->irq < 0)
+ if (client->irq <= 0)
return -EINVAL;
mutex_lock(&ds1374->mutex);
@@ -212,7 +212,7 @@ static int ds1374_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
int cr;
int ret = 0;
- if (client->irq < 0)
+ if (client->irq <= 0)
return -EINVAL;
ret = ds1374_read_time(dev, &now);
@@ -381,7 +381,7 @@ static int ds1374_probe(struct i2c_client *client,
if (ret)
goto out_free;
- if (client->irq >= 0) {
+ if (client->irq > 0) {
ret = request_irq(client->irq, ds1374_irq, 0,
"ds1374", client);
if (ret) {
@@ -401,7 +401,7 @@ static int ds1374_probe(struct i2c_client *client,
return 0;
out_irq:
- if (client->irq >= 0)
+ if (client->irq > 0)
free_irq(client->irq, client);
out_free:
@@ -414,7 +414,7 @@ static int __devexit ds1374_remove(struct i2c_client *client)
{
struct ds1374 *ds1374 = i2c_get_clientdata(client);
- if (client->irq >= 0) {
+ if (client->irq > 0) {
mutex_lock(&ds1374->mutex);
ds1374->exiting = 1;
mutex_unlock(&ds1374->mutex);
diff --git a/drivers/rtc/rtc-ep93xx.c b/drivers/rtc/rtc-ep93xx.c
index 1e99325270df..36e4ac0bd69c 100644
--- a/drivers/rtc/rtc-ep93xx.c
+++ b/drivers/rtc/rtc-ep93xx.c
@@ -12,7 +12,7 @@
#include <linux/module.h>
#include <linux/rtc.h>
#include <linux/platform_device.h>
-#include <asm/hardware.h>
+#include <mach/hardware.h>
#define EP93XX_RTC_REG(x) (EP93XX_RTC_BASE + (x))
#define EP93XX_RTC_DATA EP93XX_RTC_REG(0x0000)
diff --git a/drivers/rtc/rtc-isl1208.c b/drivers/rtc/rtc-isl1208.c
index fbb90b1e4098..a81adab6e515 100644
--- a/drivers/rtc/rtc-isl1208.c
+++ b/drivers/rtc/rtc-isl1208.c
@@ -482,7 +482,7 @@ isl1208_sysfs_register(struct device *dev)
static int
isl1208_sysfs_unregister(struct device *dev)
{
- device_remove_file(dev, &dev_attr_atrim);
+ device_remove_file(dev, &dev_attr_dtrim);
device_remove_file(dev, &dev_attr_atrim);
device_remove_file(dev, &dev_attr_usr);
diff --git a/drivers/rtc/rtc-max6902.c b/drivers/rtc/rtc-max6902.c
index 12f0310ae89c..78b2551fb19d 100644
--- a/drivers/rtc/rtc-max6902.c
+++ b/drivers/rtc/rtc-max6902.c
@@ -20,8 +20,6 @@
*/
#include <linux/module.h>
-#include <linux/version.h>
-
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/init.h>
diff --git a/drivers/rtc/rtc-r9701.c b/drivers/rtc/rtc-r9701.c
index b35f9bfa2af4..395985b339c9 100644
--- a/drivers/rtc/rtc-r9701.c
+++ b/drivers/rtc/rtc-r9701.c
@@ -14,7 +14,6 @@
*/
#include <linux/module.h>
-#include <linux/version.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/device.h>
diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index 54b1ebb01502..e7d19b6c265a 100644
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -22,7 +22,7 @@
#include <linux/clk.h>
#include <linux/log2.h>
-#include <asm/hardware.h>
+#include <mach/hardware.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/irq.h>
diff --git a/drivers/rtc/rtc-sa1100.c b/drivers/rtc/rtc-sa1100.c
index f47294c60148..66a9bb85bbe8 100644
--- a/drivers/rtc/rtc-sa1100.c
+++ b/drivers/rtc/rtc-sa1100.c
@@ -31,11 +31,11 @@
#include <linux/pm.h>
#include <linux/bitops.h>
-#include <asm/hardware.h>
+#include <mach/hardware.h>
#include <asm/irq.h>
#ifdef CONFIG_ARCH_PXA
-#include <asm/arch/pxa-regs.h>
+#include <mach/pxa-regs.h>
#endif
#define TIMER_FREQ CLOCK_TICK_RATE
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 12:12:59 +0100