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