Merge branch 'master' into for-next

15 files changed, 639 insertions, 188 deletions

diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 50ac047cd13..10ba12c8c5e 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -611,6 +611,13 @@ config RTC_DRV_AB3100
 	  Select this to enable the ST-Ericsson AB3100 Mixed Signal IC RTC
 	  support. This chip contains a battery- and capacitor-backed RTC.
 
+config RTC_DRV_AB8500
+	tristate "ST-Ericsson AB8500 RTC"
+	depends on AB8500_CORE
+	help
+	  Select this to enable the ST-Ericsson AB8500 power management IC RTC
+	  support. This chip contains a battery- and capacitor-backed RTC.
+
 config RTC_DRV_NUC900
 	tristate "NUC910/NUC920 RTC driver"
 	depends on RTC_CLASS && ARCH_W90X900
@@ -640,7 +647,7 @@ config RTC_DRV_OMAP
 
 config RTC_DRV_S3C
 	tristate "Samsung S3C series SoC RTC"
-	depends on ARCH_S3C2410
+	depends on ARCH_S3C2410 || ARCH_S3C64XX
 	help
 	  RTC (Realtime Clock) driver for the clock inbuilt into the
 	  Samsung S3C24XX series of SoCs. This can provide periodic
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 245311a1348..5adbba7cf89 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -18,6 +18,7 @@ rtc-core-$(CONFIG_RTC_INTF_SYSFS) += rtc-sysfs.o
 # Keep the list ordered.
 
 obj-$(CONFIG_RTC_DRV_AB3100)	+= rtc-ab3100.o
+obj-$(CONFIG_RTC_DRV_AB8500)	+= rtc-ab8500.o
 obj-$(CONFIG_RTC_DRV_AT32AP700X)+= rtc-at32ap700x.o
 obj-$(CONFIG_RTC_DRV_AT91RM9200)+= rtc-at91rm9200.o
 obj-$(CONFIG_RTC_DRV_AT91SAM9)	+= rtc-at91sam9.o
diff --git a/drivers/rtc/rtc-ab3100.c b/drivers/rtc/rtc-ab3100.c
index 4704aac2b5a..d26780ea254 100644
--- a/drivers/rtc/rtc-ab3100.c
+++ b/drivers/rtc/rtc-ab3100.c
@@ -9,7 +9,7 @@
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/rtc.h>
-#include <linux/mfd/ab3100.h>
+#include <linux/mfd/abx500.h>
 
 /* Clock rate in Hz */
 #define AB3100_RTC_CLOCK_RATE	32768
@@ -45,7 +45,6 @@
  */
 static int ab3100_rtc_set_mmss(struct device *dev, unsigned long secs)
 {
-	struct ab3100 *ab3100_data = dev_get_drvdata(dev);
 	u8 regs[] = {AB3100_TI0, AB3100_TI1, AB3100_TI2,
 		     AB3100_TI3, AB3100_TI4, AB3100_TI5};
 	unsigned char buf[6];
@@ -61,27 +60,26 @@ static int ab3100_rtc_set_mmss(struct device *dev, unsigned long secs)
 	buf[5] = (fat_time >> 40) & 0xFF;
 
 	for (i = 0; i < 6; i++) {
-		err = ab3100_set_register_interruptible(ab3100_data,
+		err = abx500_set_register_interruptible(dev, 0,
 							regs[i], buf[i]);
 		if (err)
 			return err;
 	}
 
 	/* Set the flag to mark that the clock is now set */
-	return ab3100_mask_and_set_register_interruptible(ab3100_data,
+	return abx500_mask_and_set_register_interruptible(dev, 0,
 							  AB3100_RTC,
-							  0xFE, 0x01);
+							  0x01, 0x01);
 
 }
 
 static int ab3100_rtc_read_time(struct device *dev, struct rtc_time *tm)
 {
-	struct ab3100 *ab3100_data = dev_get_drvdata(dev);
 	unsigned long time;
 	u8 rtcval;
 	int err;
 
-	err = ab3100_get_register_interruptible(ab3100_data,
+	err = abx500_get_register_interruptible(dev, 0,
 						AB3100_RTC, &rtcval);
 	if (err)
 		return err;
@@ -94,7 +92,7 @@ static int ab3100_rtc_read_time(struct device *dev, struct rtc_time *tm)
 		u8 buf[6];
 
 		/* Read out time registers */
-		err = ab3100_get_register_page_interruptible(ab3100_data,
+		err = abx500_get_register_page_interruptible(dev, 0,
 							     AB3100_TI0,
 							     buf, 6);
 		if (err != 0)
@@ -114,7 +112,6 @@ static int ab3100_rtc_read_time(struct device *dev, struct rtc_time *tm)
 
 static int ab3100_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 {
-	struct ab3100 *ab3100_data = dev_get_drvdata(dev);
 	unsigned long time;
 	u64 fat_time;
 	u8 buf[6];
@@ -122,7 +119,7 @@ static int ab3100_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 	int err;
 
 	/* Figure out if alarm is enabled or not */
-	err = ab3100_get_register_interruptible(ab3100_data,
+	err = abx500_get_register_interruptible(dev, 0,
 						AB3100_RTC, &rtcval);
 	if (err)
 		return err;
@@ -133,7 +130,7 @@ static int ab3100_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 	/* No idea how this could be represented */
 	alarm->pending = 0;
 	/* Read out alarm registers, only 4 bytes */
-	err = ab3100_get_register_page_interruptible(ab3100_data,
+	err = abx500_get_register_page_interruptible(dev, 0,
 						     AB3100_AL0, buf, 4);
 	if (err)
 		return err;
@@ -148,7 +145,6 @@ static int ab3100_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 
 static int ab3100_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 {
-	struct ab3100 *ab3100_data = dev_get_drvdata(dev);
 	u8 regs[] = {AB3100_AL0, AB3100_AL1, AB3100_AL2, AB3100_AL3};
 	unsigned char buf[4];
 	unsigned long secs;
@@ -165,21 +161,19 @@ static int ab3100_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 
 	/* Set the alarm */
 	for (i = 0; i < 4; i++) {
-		err = ab3100_set_register_interruptible(ab3100_data,
+		err = abx500_set_register_interruptible(dev, 0,
 							regs[i], buf[i]);
 		if (err)
 			return err;
 	}
 	/* Then enable the alarm */
-	return ab3100_mask_and_set_register_interruptible(ab3100_data,
-							  AB3100_RTC, ~(1 << 2),
+	return abx500_mask_and_set_register_interruptible(dev, 0,
+							  AB3100_RTC, (1 << 2),
 							  alarm->enabled << 2);
 }
 
 static int ab3100_rtc_irq_enable(struct device *dev, unsigned int enabled)
 {
-	struct ab3100 *ab3100_data = dev_get_drvdata(dev);
-
 	/*
 	 * It's not possible to enable/disable the alarm IRQ for this RTC.
 	 * It does not actually trigger any IRQ: instead its only function is
@@ -188,12 +182,12 @@ static int ab3100_rtc_irq_enable(struct device *dev, unsigned int enabled)
 	 * and need to be handled there instead.
 	 */
 	if (enabled)
-		return ab3100_mask_and_set_register_interruptible(ab3100_data,
-						    AB3100_RTC, ~(1 << 2),
+		return abx500_mask_and_set_register_interruptible(dev, 0,
+						    AB3100_RTC, (1 << 2),
 						    1 << 2);
 	else
-		return ab3100_mask_and_set_register_interruptible(ab3100_data,
-						    AB3100_RTC, ~(1 << 2),
+		return abx500_mask_and_set_register_interruptible(dev, 0,
+						    AB3100_RTC, (1 << 2),
 						    0);
 }
 
@@ -210,10 +204,9 @@ static int __init ab3100_rtc_probe(struct platform_device *pdev)
 	int err;
 	u8 regval;
 	struct rtc_device *rtc;
-	struct ab3100 *ab3100_data = platform_get_drvdata(pdev);
 
 	/* The first RTC register needs special treatment */
-	err = ab3100_get_register_interruptible(ab3100_data,
+	err = abx500_get_register_interruptible(&pdev->dev, 0,
 						AB3100_RTC, &regval);
 	if (err) {
 		dev_err(&pdev->dev, "unable to read RTC register\n");
@@ -231,7 +224,7 @@ static int __init ab3100_rtc_probe(struct platform_device *pdev)
 		 * This bit remains until RTC power is lost.
 		 */
 		regval = 1 | RTC_SETTING;
-		err = ab3100_set_register_interruptible(ab3100_data,
+		err = abx500_set_register_interruptible(&pdev->dev, 0,
 							AB3100_RTC, regval);
 		/* Ignore any error on this write */
 	}
diff --git a/drivers/rtc/rtc-ab8500.c b/drivers/rtc/rtc-ab8500.c
new file mode 100644
index 00000000000..2fda03125e5
--- /dev/null
+++ b/drivers/rtc/rtc-ab8500.c
@@ -0,0 +1,363 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ * Author: Virupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com>
+ *
+ * RTC clock driver for the RTC part of the AB8500 Power management chip.
+ * Based on RTC clock driver for the AB3100 Analog Baseband Chip by
+ * Linus Walleij <linus.walleij@stericsson.com>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/rtc.h>
+#include <linux/mfd/ab8500.h>
+#include <linux/delay.h>
+
+#define AB8500_RTC_SOFF_STAT_REG	0x0F00
+#define AB8500_RTC_CC_CONF_REG		0x0F01
+#define AB8500_RTC_READ_REQ_REG		0x0F02
+#define AB8500_RTC_WATCH_TSECMID_REG	0x0F03
+#define AB8500_RTC_WATCH_TSECHI_REG	0x0F04
+#define AB8500_RTC_WATCH_TMIN_LOW_REG	0x0F05
+#define AB8500_RTC_WATCH_TMIN_MID_REG	0x0F06
+#define AB8500_RTC_WATCH_TMIN_HI_REG	0x0F07
+#define AB8500_RTC_ALRM_MIN_LOW_REG	0x0F08
+#define AB8500_RTC_ALRM_MIN_MID_REG	0x0F09
+#define AB8500_RTC_ALRM_MIN_HI_REG	0x0F0A
+#define AB8500_RTC_STAT_REG		0x0F0B
+#define AB8500_RTC_BKUP_CHG_REG		0x0F0C
+#define AB8500_RTC_FORCE_BKUP_REG	0x0F0D
+#define AB8500_RTC_CALIB_REG		0x0F0E
+#define AB8500_RTC_SWITCH_STAT_REG	0x0F0F
+#define AB8500_REV_REG			0x1080
+
+/* RtcReadRequest bits */
+#define RTC_READ_REQUEST		0x01
+#define RTC_WRITE_REQUEST		0x02
+
+/* RtcCtrl bits */
+#define RTC_ALARM_ENA			0x04
+#define RTC_STATUS_DATA			0x01
+
+#define COUNTS_PER_SEC			(0xF000 / 60)
+#define AB8500_RTC_EPOCH		2000
+
+static const unsigned long ab8500_rtc_time_regs[] = {
+	AB8500_RTC_WATCH_TMIN_HI_REG, AB8500_RTC_WATCH_TMIN_MID_REG,
+	AB8500_RTC_WATCH_TMIN_LOW_REG, AB8500_RTC_WATCH_TSECHI_REG,
+	AB8500_RTC_WATCH_TSECMID_REG
+};
+
+static const unsigned long ab8500_rtc_alarm_regs[] = {
+	AB8500_RTC_ALRM_MIN_HI_REG, AB8500_RTC_ALRM_MIN_MID_REG,
+	AB8500_RTC_ALRM_MIN_LOW_REG
+};
+
+/* Calculate the seconds from 1970 to 01-01-2000 00:00:00 */
+static unsigned long get_elapsed_seconds(int year)
+{
+	unsigned long secs;
+	struct rtc_time tm = {
+		.tm_year = year - 1900,
+		.tm_mday = 1,
+	};
+
+	/*
+	 * This function calculates secs from 1970 and not from
+	 * 1900, even if we supply the offset from year 1900.
+	 */
+	rtc_tm_to_time(&tm, &secs);
+	return secs;
+}
+
+static int ab8500_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+	struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
+	unsigned long timeout = jiffies + HZ;
+	int retval, i;
+	unsigned long mins, secs;
+	unsigned char buf[ARRAY_SIZE(ab8500_rtc_time_regs)];
+
+	/* Request a data read */
+	retval = ab8500_write(ab8500, AB8500_RTC_READ_REQ_REG,
+			      RTC_READ_REQUEST);
+	if (retval < 0)
+		return retval;
+
+	/* Early AB8500 chips will not clear the rtc read request bit */
+	if (ab8500->revision == 0) {
+		msleep(1);
+	} else {
+		/* Wait for some cycles after enabling the rtc read in ab8500 */
+		while (time_before(jiffies, timeout)) {
+			retval = ab8500_read(ab8500, AB8500_RTC_READ_REQ_REG);
+			if (retval < 0)
+				return retval;
+
+			if (!(retval & RTC_READ_REQUEST))
+				break;
+
+			msleep(1);
+		}
+	}
+
+	/* Read the Watchtime registers */
+	for (i = 0; i < ARRAY_SIZE(ab8500_rtc_time_regs); i++) {
+		retval = ab8500_read(ab8500, ab8500_rtc_time_regs[i]);
+		if (retval < 0)
+			return retval;
+		buf[i] = retval;
+	}
+
+	mins = (buf[0] << 16) | (buf[1] << 8) | buf[2];
+
+	secs =	(buf[3] << 8) | buf[4];
+	secs =	secs / COUNTS_PER_SEC;
+	secs =	secs + (mins * 60);
+
+	/* Add back the initially subtracted number of seconds */
+	secs += get_elapsed_seconds(AB8500_RTC_EPOCH);
+
+	rtc_time_to_tm(secs, tm);
+	return rtc_valid_tm(tm);
+}
+
+static int ab8500_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+	struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
+	int retval, i;
+	unsigned char buf[ARRAY_SIZE(ab8500_rtc_time_regs)];
+	unsigned long no_secs, no_mins, secs = 0;
+
+	if (tm->tm_year < (AB8500_RTC_EPOCH - 1900)) {
+		dev_dbg(dev, "year should be equal to or greater than %d\n",
+				AB8500_RTC_EPOCH);
+		return -EINVAL;
+	}
+
+	/* Get the number of seconds since 1970 */
+	rtc_tm_to_time(tm, &secs);
+
+	/*
+	 * Convert it to the number of seconds since 01-01-2000 00:00:00, since
+	 * we only have a small counter in the RTC.
+	 */
+	secs -= get_elapsed_seconds(AB8500_RTC_EPOCH);
+
+	no_mins = secs / 60;
+
+	no_secs = secs % 60;
+	/* Make the seconds count as per the RTC resolution */
+	no_secs = no_secs * COUNTS_PER_SEC;
+
+	buf[4] = no_secs & 0xFF;
+	buf[3] = (no_secs >> 8) & 0xFF;
+
+	buf[2] = no_mins & 0xFF;
+	buf[1] = (no_mins >> 8) & 0xFF;
+	buf[0] = (no_mins >> 16) & 0xFF;
+
+	for (i = 0; i < ARRAY_SIZE(ab8500_rtc_time_regs); i++) {
+		retval = ab8500_write(ab8500, ab8500_rtc_time_regs[i], buf[i]);
+		if (retval < 0)
+			return retval;
+	}
+
+	/* Request a data write */
+	return ab8500_write(ab8500, AB8500_RTC_READ_REQ_REG, RTC_WRITE_REQUEST);
+}
+
+static int ab8500_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
+{
+	struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
+	int retval, i;
+	int rtc_ctrl;
+	unsigned char buf[ARRAY_SIZE(ab8500_rtc_alarm_regs)];
+	unsigned long secs, mins;
+
+	/* Check if the alarm is enabled or not */
+	rtc_ctrl = ab8500_read(ab8500, AB8500_RTC_STAT_REG);
+	if (rtc_ctrl < 0)
+		return rtc_ctrl;
+
+	if (rtc_ctrl & RTC_ALARM_ENA)
+		alarm->enabled = 1;
+	else
+		alarm->enabled = 0;
+
+	alarm->pending = 0;
+
+	for (i = 0; i < ARRAY_SIZE(ab8500_rtc_alarm_regs); i++) {
+		retval = ab8500_read(ab8500, ab8500_rtc_alarm_regs[i]);
+		if (retval < 0)
+			return retval;
+		buf[i] = retval;
+	}
+
+	mins = (buf[0] << 16) | (buf[1] << 8) | (buf[2]);
+	secs = mins * 60;
+
+	/* Add back the initially subtracted number of seconds */
+	secs += get_elapsed_seconds(AB8500_RTC_EPOCH);
+
+	rtc_time_to_tm(secs, &alarm->time);
+
+	return rtc_valid_tm(&alarm->time);
+}
+
+static int ab8500_rtc_irq_enable(struct device *dev, unsigned int enabled)
+{
+	struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
+
+	return ab8500_set_bits(ab8500, AB8500_RTC_STAT_REG, RTC_ALARM_ENA,
+			       enabled ? RTC_ALARM_ENA : 0);
+}
+
+static int ab8500_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
+{
+	struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
+	int retval, i;
+	unsigned char buf[ARRAY_SIZE(ab8500_rtc_alarm_regs)];
+	unsigned long mins, secs = 0;
+
+	if (alarm->time.tm_year < (AB8500_RTC_EPOCH - 1900)) {
+		dev_dbg(dev, "year should be equal to or greater than %d\n",
+				AB8500_RTC_EPOCH);
+		return -EINVAL;
+	}
+
+	/* Get the number of seconds since 1970 */
+	rtc_tm_to_time(&alarm->time, &secs);
+
+	/*
+	 * Convert it to the number of seconds since 01-01-2000 00:00:00, since
+	 * we only have a small counter in the RTC.
+	 */
+	secs -= get_elapsed_seconds(AB8500_RTC_EPOCH);
+
+	mins = secs / 60;
+
+	buf[2] = mins & 0xFF;
+	buf[1] = (mins >> 8) & 0xFF;
+	buf[0] = (mins >> 16) & 0xFF;
+
+	/* Set the alarm time */
+	for (i = 0; i < ARRAY_SIZE(ab8500_rtc_alarm_regs); i++) {
+		retval = ab8500_write(ab8500, ab8500_rtc_alarm_regs[i], buf[i]);
+		if (retval < 0)
+			return retval;
+	}
+
+	return ab8500_rtc_irq_enable(dev, alarm->enabled);
+}
+
+static irqreturn_t rtc_alarm_handler(int irq, void *data)
+{
+	struct rtc_device *rtc = data;
+	unsigned long events = RTC_IRQF | RTC_AF;
+
+	dev_dbg(&rtc->dev, "%s\n", __func__);
+	rtc_update_irq(rtc, 1, events);
+
+	return IRQ_HANDLED;
+}
+
+static const struct rtc_class_ops ab8500_rtc_ops = {
+	.read_time		= ab8500_rtc_read_time,
+	.set_time		= ab8500_rtc_set_time,
+	.read_alarm		= ab8500_rtc_read_alarm,
+	.set_alarm		= ab8500_rtc_set_alarm,
+	.alarm_irq_enable	= ab8500_rtc_irq_enable,
+};
+
+static int __devinit ab8500_rtc_probe(struct platform_device *pdev)
+{
+	struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
+	int err;
+	struct rtc_device *rtc;
+	int rtc_ctrl;
+	int irq;
+
+	irq = platform_get_irq_byname(pdev, "ALARM");
+	if (irq < 0)
+		return irq;
+
+	/* For RTC supply test */
+	err = ab8500_set_bits(ab8500, AB8500_RTC_STAT_REG, RTC_STATUS_DATA,
+			RTC_STATUS_DATA);
+	if (err < 0)
+		return err;
+
+	/* Wait for reset by the PorRtc */
+	msleep(1);
+
+	rtc_ctrl = ab8500_read(ab8500, AB8500_RTC_STAT_REG);
+	if (rtc_ctrl < 0)
+		return rtc_ctrl;
+
+	/* Check if the RTC Supply fails */
+	if (!(rtc_ctrl & RTC_STATUS_DATA)) {
+		dev_err(&pdev->dev, "RTC supply failure\n");
+		return -ENODEV;
+	}
+
+	rtc = rtc_device_register("ab8500-rtc", &pdev->dev, &ab8500_rtc_ops,
+			THIS_MODULE);
+	if (IS_ERR(rtc)) {
+		dev_err(&pdev->dev, "Registration failed\n");
+		err = PTR_ERR(rtc);
+		return err;
+	}
+
+	err = request_threaded_irq(irq, NULL, rtc_alarm_handler, 0,
+				   "ab8500-rtc", rtc);
+	if (err < 0) {
+		rtc_device_unregister(rtc);
+		return err;
+	}
+
+	platform_set_drvdata(pdev, rtc);
+
+	return 0;
+}
+
+static int __devexit ab8500_rtc_remove(struct platform_device *pdev)
+{
+	struct rtc_device *rtc = platform_get_drvdata(pdev);
+	int irq = platform_get_irq_byname(pdev, "ALARM");
+
+	free_irq(irq, rtc);
+	rtc_device_unregister(rtc);
+	platform_set_drvdata(pdev, NULL);
+
+	return 0;
+}
+
+static struct platform_driver ab8500_rtc_driver = {
+	.driver = {
+		.name = "ab8500-rtc",
+		.owner = THIS_MODULE,
+	},
+	.probe	= ab8500_rtc_probe,
+	.remove = __devexit_p(ab8500_rtc_remove),
+};
+
+static int __init ab8500_rtc_init(void)
+{
+	return platform_driver_register(&ab8500_rtc_driver);
+}
+
+static void __exit ab8500_rtc_exit(void)
+{
+	platform_driver_unregister(&ab8500_rtc_driver);
+}
+
+module_init(ab8500_rtc_init);
+module_exit(ab8500_rtc_exit);
+MODULE_AUTHOR("Virupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com>");
+MODULE_DESCRIPTION("AB8500 RTC Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index ece4dbddc0e..11b8ea29d2b 100644
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c
@@ -238,31 +238,32 @@ static int cmos_read_alarm(struct device *dev, struct rtc_wkalrm *t)
 	rtc_control = CMOS_READ(RTC_CONTROL);
 	spin_unlock_irq(&rtc_lock);
 
-	/* REVISIT this assumes PC style usage:  always BCD */
-
-	if (((unsigned)t->time.tm_sec) < 0x60)
-		t->time.tm_sec = bcd2bin(t->time.tm_sec);
-	else
-		t->time.tm_sec = -1;
-	if (((unsigned)t->time.tm_min) < 0x60)
-		t->time.tm_min = bcd2bin(t->time.tm_min);
-	else
-		t->time.tm_min = -1;
-	if (((unsigned)t->time.tm_hour) < 0x24)
-		t->time.tm_hour = bcd2bin(t->time.tm_hour);
-	else
-		t->time.tm_hour = -1;
-
-	if (cmos->day_alrm) {
-		if (((unsigned)t->time.tm_mday) <= 0x31)
-			t->time.tm_mday = bcd2bin(t->time.tm_mday);
+	if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
+		if (((unsigned)t->time.tm_sec) < 0x60)
+			t->time.tm_sec = bcd2bin(t->time.tm_sec);
 		else
-			t->time.tm_mday = -1;
-		if (cmos->mon_alrm) {
-			if (((unsigned)t->time.tm_mon) <= 0x12)
-				t->time.tm_mon = bcd2bin(t->time.tm_mon) - 1;
+			t->time.tm_sec = -1;
+		if (((unsigned)t->time.tm_min) < 0x60)
+			t->time.tm_min = bcd2bin(t->time.tm_min);
+		else
+			t->time.tm_min = -1;
+		if (((unsigned)t->time.tm_hour) < 0x24)
+			t->time.tm_hour = bcd2bin(t->time.tm_hour);
+		else
+			t->time.tm_hour = -1;
+
+		if (cmos->day_alrm) {
+			if (((unsigned)t->time.tm_mday) <= 0x31)
+				t->time.tm_mday = bcd2bin(t->time.tm_mday);
 			else
-				t->time.tm_mon = -1;
+				t->time.tm_mday = -1;
+
+			if (cmos->mon_alrm) {
+				if (((unsigned)t->time.tm_mon) <= 0x12)
+					t->time.tm_mon = bcd2bin(t->time.tm_mon)-1;
+				else
+					t->time.tm_mon = -1;
+			}
 		}
 	}
 	t->time.tm_year = -1;
@@ -322,29 +323,26 @@ static void cmos_irq_disable(struct cmos_rtc *cmos, unsigned char mask)
 static int cmos_set_alarm(struct device *dev, struct rtc_wkalrm *t)
 {
 	struct cmos_rtc	*cmos = dev_get_drvdata(dev);
-	unsigned char	mon, mday, hrs, min, sec;
+       unsigned char   mon, mday, hrs, min, sec, rtc_control;
 
 	if (!is_valid_irq(cmos->irq))
 		return -EIO;
 
-	/* REVISIT this assumes PC style usage:  always BCD */
-
-	/* Writing 0xff means "don't care" or "match all".  */
-
 	mon = t->time.tm_mon + 1;
-	mon = (mon <= 12) ? bin2bcd(mon) : 0xff;
-
 	mday = t->time.tm_mday;
-	mday = (mday >= 1 && mday <= 31) ? bin2bcd(mday) : 0xff;
-
 	hrs = t->time.tm_hour;
-	hrs = (hrs < 24) ? bin2bcd(hrs) : 0xff;
-
 	min = t->time.tm_min;
-	min = (min < 60) ? bin2bcd(min) : 0xff;
-
 	sec = t->time.tm_sec;
-	sec = (sec < 60) ? bin2bcd(sec) : 0xff;
+
+	rtc_control = CMOS_READ(RTC_CONTROL);
+	if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
+		/* Writing 0xff means "don't care" or "match all".  */
+		mon = (mon <= 12) ? bin2bcd(mon) : 0xff;
+		mday = (mday >= 1 && mday <= 31) ? bin2bcd(mday) : 0xff;
+		hrs = (hrs < 24) ? bin2bcd(hrs) : 0xff;
+		min = (min < 60) ? bin2bcd(min) : 0xff;
+		sec = (sec < 60) ? bin2bcd(sec) : 0xff;
+	}
 
 	spin_lock_irq(&rtc_lock);
 
@@ -478,7 +476,7 @@ static int cmos_procfs(struct device *dev, struct seq_file *seq)
 			"update_IRQ\t: %s\n"
 			"HPET_emulated\t: %s\n"
 			// "square_wave\t: %s\n"
-			// "BCD\t\t: %s\n"
+			"BCD\t\t: %s\n"
 			"DST_enable\t: %s\n"
 			"periodic_freq\t: %d\n"
 			"batt_status\t: %s\n",
@@ -486,7 +484,7 @@ static int cmos_procfs(struct device *dev, struct seq_file *seq)
 			(rtc_control & RTC_UIE) ? "yes" : "no",
 			is_hpet_enabled() ? "yes" : "no",
 			// (rtc_control & RTC_SQWE) ? "yes" : "no",
-			// (rtc_control & RTC_DM_BINARY) ? "no" : "yes",
+			(rtc_control & RTC_DM_BINARY) ? "no" : "yes",
 			(rtc_control & RTC_DST_EN) ? "yes" : "no",
 			cmos->rtc->irq_freq,
 			(valid & RTC_VRT) ? "okay" : "dead");
@@ -721,6 +719,9 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq)
 		}
 	}
 
+	cmos_rtc.dev = dev;
+	dev_set_drvdata(dev, &cmos_rtc);
+
 	cmos_rtc.rtc = rtc_device_register(driver_name, dev,
 				&cmos_rtc_ops, THIS_MODULE);
 	if (IS_ERR(cmos_rtc.rtc)) {
@@ -728,8 +729,6 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq)
 		goto cleanup0;
 	}
 
-	cmos_rtc.dev = dev;
-	dev_set_drvdata(dev, &cmos_rtc);
 	rename_region(ports, dev_name(&cmos_rtc.rtc->dev));
 
 	spin_lock_irq(&rtc_lock);
@@ -751,12 +750,11 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq)
 
 	spin_unlock_irq(&rtc_lock);
 
-	/* FIXME teach the alarm code how to handle binary mode;
+	/* FIXME:
 	 * <asm-generic/rtc.h> doesn't know 12-hour mode either.
 	 */
-	if (is_valid_irq(rtc_irq) &&
-	    (!(rtc_control & RTC_24H) || (rtc_control & (RTC_DM_BINARY)))) {
-		dev_dbg(dev, "only 24-hr BCD mode supported\n");
+       if (is_valid_irq(rtc_irq) && !(rtc_control & RTC_24H)) {
+		dev_warn(dev, "only 24-hr supported\n");
 		retval = -ENXIO;
 		goto cleanup1;
 	}
diff --git a/drivers/rtc/rtc-ds1302.c b/drivers/rtc/rtc-ds1302.c
index 532acf9b05d..359d1e04626 100644
--- a/drivers/rtc/rtc-ds1302.c
+++ b/drivers/rtc/rtc-ds1302.c
@@ -16,7 +16,6 @@
 #include <linux/rtc.h>
 #include <linux/io.h>
 #include <linux/bcd.h>
-#include <asm/rtc.h>
 
 #define DRV_NAME	"rtc-ds1302"
 #define DRV_VERSION	"0.1.1"
@@ -34,14 +33,55 @@
 #define	RTC_ADDR_MIN	0x01		/* Address of minute register */
 #define	RTC_ADDR_SEC	0x00		/* Address of second register */
 
+#ifdef CONFIG_SH_SECUREEDGE5410
+#include <asm/rtc.h>
+#include <mach/snapgear.h>
+
 #define	RTC_RESET	0x1000
 #define	RTC_IODATA	0x0800
 #define	RTC_SCLK	0x0400
 
-#ifdef CONFIG_SH_SECUREEDGE5410
-#include <mach/snapgear.h>
 #define set_dp(x)	SECUREEDGE_WRITE_IOPORT(x, 0x1c00)
 #define get_dp()	SECUREEDGE_READ_IOPORT()
+#define ds1302_set_tx()
+#define ds1302_set_rx()
+
+static inline int ds1302_hw_init(void)
+{
+	return 0;
+}
+
+static inline void ds1302_reset(void)
+{
+	set_dp(get_dp() & ~(RTC_RESET | RTC_IODATA | RTC_SCLK));
+}
+
+static inline void ds1302_clock(void)
+{
+	set_dp(get_dp() | RTC_SCLK);	/* clock high */
+	set_dp(get_dp() & ~RTC_SCLK);	/* clock low */
+}
+
+static inline void ds1302_start(void)
+{
+	set_dp(get_dp() | RTC_RESET);
+}
+
+static inline void ds1302_stop(void)
+{
+	set_dp(get_dp() & ~RTC_RESET);
+}
+
+static inline void ds1302_txbit(int bit)
+{
+	set_dp((get_dp() & ~RTC_IODATA) | (bit ? RTC_IODATA : 0));
+}
+
+static inline int ds1302_rxbit(void)
+{
+	return !!(get_dp() & RTC_IODATA);
+}
+
 #else
 #error "Add support for your platform"
 #endif
@@ -50,11 +90,11 @@ static void ds1302_sendbits(unsigned int val)
 {
 	int i;
 
+	ds1302_set_tx();
+
 	for (i = 8; (i); i--, val >>= 1) {
-		set_dp((get_dp() & ~RTC_IODATA) | ((val & 0x1) ?
-			RTC_IODATA : 0));
-		set_dp(get_dp() | RTC_SCLK);	/* clock high */
-		set_dp(get_dp() & ~RTC_SCLK);	/* clock low */
+		ds1302_txbit(val & 0x1);
+		ds1302_clock();
 	}
 }
 
@@ -63,10 +103,11 @@ static unsigned int ds1302_recvbits(void)
 	unsigned int val;
 	int i;
 
+	ds1302_set_rx();
+
 	for (i = 0, val = 0; (i < 8); i++) {
-		val |= (((get_dp() & RTC_IODATA) ? 1 : 0) << i);
-		set_dp(get_dp() | RTC_SCLK);	/* clock high */
-		set_dp(get_dp() & ~RTC_SCLK);	/* clock low */
+		val |= (ds1302_rxbit() << i);
+		ds1302_clock();
 	}
 
 	return val;
@@ -76,23 +117,24 @@ static unsigned int ds1302_readbyte(unsigned int addr)
 {
 	unsigned int val;
 
-	set_dp(get_dp() & ~(RTC_RESET | RTC_IODATA | RTC_SCLK));
+	ds1302_reset();
 
-	set_dp(get_dp() | RTC_RESET);
+	ds1302_start();
 	ds1302_sendbits(((addr & 0x3f) << 1) | RTC_CMD_READ);
 	val = ds1302_recvbits();
-	set_dp(get_dp() & ~RTC_RESET);
+	ds1302_stop();
 
 	return val;
 }
 
 static void ds1302_writebyte(unsigned int addr, unsigned int val)
 {
-	set_dp(get_dp() & ~(RTC_RESET | RTC_IODATA | RTC_SCLK));
-	set_dp(get_dp() | RTC_RESET);
+	ds1302_reset();
+
+	ds1302_start();
 	ds1302_sendbits(((addr & 0x3f) << 1) | RTC_CMD_WRITE);
 	ds1302_sendbits(val);
-	set_dp(get_dp() & ~RTC_RESET);
+	ds1302_stop();
 }
 
 static int ds1302_rtc_read_time(struct device *dev, struct rtc_time *tm)
@@ -167,13 +209,20 @@ static int __init ds1302_rtc_probe(struct platform_device *pdev)
 {
 	struct rtc_device *rtc;
 
+	if (ds1302_hw_init()) {
+		dev_err(&pdev->dev, "Failed to init communication channel");
+		return -EINVAL;
+	}
+
 	/* Reset */
-	set_dp(get_dp() & ~(RTC_RESET | RTC_IODATA | RTC_SCLK));
+	ds1302_reset();
 
 	/* Write a magic value to the DS1302 RAM, and see if it sticks. */
 	ds1302_writebyte(RTC_ADDR_RAM0, 0x42);
-	if (ds1302_readbyte(RTC_ADDR_RAM0) != 0x42)
+	if (ds1302_readbyte(RTC_ADDR_RAM0) != 0x42) {
+		dev_err(&pdev->dev, "Failed to probe");
 		return -ENODEV;
+	}
 
 	rtc = rtc_device_register("ds1302", &pdev->dev,
 					   &ds1302_rtc_ops, THIS_MODULE);
diff --git a/drivers/rtc/rtc-ds1374.c b/drivers/rtc/rtc-ds1374.c
index 61945734ad0..1f0007fd443 100644
--- a/drivers/rtc/rtc-ds1374.c
+++ b/drivers/rtc/rtc-ds1374.c
@@ -403,7 +403,6 @@ out_irq:
 		free_irq(client->irq, client);
 
 out_free:
-	i2c_set_clientdata(client, NULL);
 	kfree(ds1374);
 	return ret;
 }
@@ -422,7 +421,6 @@ static int __devexit ds1374_remove(struct i2c_client *client)
 	}
 
 	rtc_device_unregister(ds1374->rtc);
-	i2c_set_clientdata(client, NULL);
 	kfree(ds1374);
 	return 0;
 }
diff --git a/drivers/rtc/rtc-isl1208.c b/drivers/rtc/rtc-isl1208.c
index 054e05294af..468200c38ec 100644
--- a/drivers/rtc/rtc-isl1208.c
+++ b/drivers/rtc/rtc-isl1208.c
@@ -462,39 +462,16 @@ isl1208_sysfs_store_usr(struct device *dev,
 static DEVICE_ATTR(usr, S_IRUGO | S_IWUSR, isl1208_sysfs_show_usr,
 		   isl1208_sysfs_store_usr);
 
-static int
-isl1208_sysfs_register(struct device *dev)
-{
-	int err;
-
-	err = device_create_file(dev, &dev_attr_atrim);
-	if (err)
-		return err;
-
-	err = device_create_file(dev, &dev_attr_dtrim);
-	if (err) {
-		device_remove_file(dev, &dev_attr_atrim);
-		return err;
-	}
-
-	err = device_create_file(dev, &dev_attr_usr);
-	if (err) {
-		device_remove_file(dev, &dev_attr_atrim);
-		device_remove_file(dev, &dev_attr_dtrim);
-	}
-
-	return 0;
-}
-
-static int
-isl1208_sysfs_unregister(struct device *dev)
-{
-	device_remove_file(dev, &dev_attr_dtrim);
-	device_remove_file(dev, &dev_attr_atrim);
-	device_remove_file(dev, &dev_attr_usr);
+static struct attribute *isl1208_rtc_attrs[] = {
+	&dev_attr_atrim.attr,
+	&dev_attr_dtrim.attr,
+	&dev_attr_usr.attr,
+	NULL
+};
 
-	return 0;
-}
+static const struct attribute_group isl1208_rtc_sysfs_files = {
+	.attrs	= isl1208_rtc_attrs,
+};
 
 static int
 isl1208_probe(struct i2c_client *client, const struct i2c_device_id *id)
@@ -529,7 +506,7 @@ isl1208_probe(struct i2c_client *client, const struct i2c_device_id *id)
 		dev_warn(&client->dev, "rtc power failure detected, "
 			 "please set clock.\n");
 
-	rc = isl1208_sysfs_register(&client->dev);
+	rc = sysfs_create_group(&client->dev.kobj, &isl1208_rtc_sysfs_files);
 	if (rc)
 		goto exit_unregister;
 
@@ -546,7 +523,7 @@ isl1208_remove(struct i2c_client *client)
 {
 	struct rtc_device *rtc = i2c_get_clientdata(client);
 
-	isl1208_sysfs_unregister(&client->dev);
+	sysfs_remove_group(&client->dev.kobj, &isl1208_rtc_sysfs_files);
 	rtc_device_unregister(rtc);
 
 	return 0;
diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c
index 60fe266f0f4..6dc4e624141 100644
--- a/drivers/rtc/rtc-m41t80.c
+++ b/drivers/rtc/rtc-m41t80.c
@@ -595,10 +595,6 @@ static void wdt_disable(void)
 static ssize_t wdt_write(struct file *file, const char __user *buf,
 			 size_t count, loff_t *ppos)
 {
-	/*  Can't seek (pwrite) on this device
-	if (ppos != &file->f_pos)
-	return -ESPIPE;
-	*/
 	if (count) {
 		wdt_ping();
 		return 1;
@@ -623,7 +619,7 @@ static ssize_t wdt_read(struct file *file, char __user *buf,
  *	according to their available features. We only actually usefully support
  *	querying capabilities and current status.
  */
-static int wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
+static int wdt_ioctl(struct file *file, un