[PATCH v2 1/4] rtc: omap: Introduce rtc_omap_dev structure to include per device data

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Currently all the device data is declared globally which will be a
problem if more than one instance of device is present. So consolidate
all the data into rtc_omap_dev struct and adopt the driver to use this.

Suggested-by: Felipe Balbi <balbi@xxxxxx>
Signed-off-by: Lokesh Vutla <lokeshvutla@xxxxxx>
---
Changes since v1:
	- New patch as suggested by Felipe.
 drivers/rtc/rtc-omap.c | 257 ++++++++++++++++++++++++++++---------------------
 1 file changed, 147 insertions(+), 110 deletions(-)

diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index 21142e6..4e90b50 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -41,8 +41,6 @@
 
 #define	DRIVER_NAME			"omap_rtc"
 
-#define OMAP_RTC_BASE			0xfffb4800
-
 /* RTC registers */
 #define OMAP_RTC_SECONDS_REG		0x00
 #define OMAP_RTC_MINUTES_REG		0x04
@@ -120,26 +118,53 @@
  */
 #define OMAP_RTC_HAS_32KCLK_EN		BIT(2)
 
-static void __iomem	*rtc_base;
+/**
+ * struct rtc_omap_dev - Per device static data for driver's use
+ * @rtc_device :	Pointer to generic RTC interface.
+ * @device:		Device Pointer.
+ * pdata :		Copy of saved platform data.
+ * rtc_base :		Base address of memory-mapped IO registers.
+ * rtc_alarm :		RTC alarm interrupt number.
+ * rtc_timer :		RTC timer interrupt number.
+ * irq_stat :		Copy of Interrupt status register.
+ */
+struct rtc_omap_dev {
+	struct rtc_device	*rtc;
+	struct device		*dev;
+	unsigned long		pdata;
+	void __iomem		*rtc_base;
+	u32			rtc_alarm;
+	u32			rtc_timer;
+	u8			irqstat;
+};
 
-#define rtc_read(addr)		readb(rtc_base + (addr))
-#define rtc_write(val, addr)	writeb(val, rtc_base + (addr))
+static inline u8 rtc_read(struct rtc_omap_dev *rtc_omap, u32 off)
+{
+	return readb(rtc_omap->rtc_base + off);
+}
 
-#define rtc_writel(val, addr)	writel(val, rtc_base + (addr))
+static inline void rtc_write(u8 val, struct rtc_omap_dev *rtc_omap, u32 off)
+{
+	writeb(val, rtc_omap->rtc_base + off);
+}
 
+static inline void rtc_writel(u32 val, struct rtc_omap_dev *rtc_omap, u32 off)
+{
+	writel(val, rtc_omap->rtc_base + off);
+}
 
 /* we rely on the rtc framework to handle locking (rtc->ops_lock),
  * so the only other requirement is that register accesses which
  * require BUSY to be clear are made with IRQs locally disabled
  */
-static void rtc_wait_not_busy(void)
+static void rtc_wait_not_busy(struct rtc_omap_dev *rtc_omap)
 {
 	int	count = 0;
 	u8	status;
 
 	/* BUSY may stay active for 1/32768 second (~30 usec) */
 	for (count = 0; count < 50; count++) {
-		status = rtc_read(OMAP_RTC_STATUS_REG);
+		status = rtc_read(rtc_omap, OMAP_RTC_STATUS_REG);
 		if ((status & (u8)OMAP_RTC_STATUS_BUSY) == 0)
 			break;
 		udelay(1);
@@ -147,16 +172,17 @@ static void rtc_wait_not_busy(void)
 	/* now we have ~15 usec to read/write various registers */
 }
 
-static irqreturn_t rtc_irq(int irq, void *rtc)
+static irqreturn_t rtc_irq(int irq, void *id)
 {
+	struct rtc_omap_dev *rtc_omap = (struct rtc_omap_dev *)id;
 	unsigned long		events = 0;
 	u8			irq_data;
 
-	irq_data = rtc_read(OMAP_RTC_STATUS_REG);
+	irq_data = rtc_read(rtc_omap, OMAP_RTC_STATUS_REG);
 
 	/* alarm irq? */
 	if (irq_data & OMAP_RTC_STATUS_ALARM) {
-		rtc_write(OMAP_RTC_STATUS_ALARM, OMAP_RTC_STATUS_REG);
+		rtc_write(OMAP_RTC_STATUS_ALARM, rtc_omap, OMAP_RTC_STATUS_REG);
 		events |= RTC_IRQF | RTC_AF;
 	}
 
@@ -164,7 +190,7 @@ static irqreturn_t rtc_irq(int irq, void *rtc)
 	if (irq_data & OMAP_RTC_STATUS_1S_EVENT)
 		events |= RTC_IRQF | RTC_UF;
 
-	rtc_update_irq(rtc, 1, events);
+	rtc_update_irq(rtc_omap->rtc, 1, events);
 
 	return IRQ_HANDLED;
 }
@@ -172,15 +198,13 @@ static irqreturn_t rtc_irq(int irq, void *rtc)
 static int omap_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
 {
 	u8 reg, irqwake_reg = 0;
-	struct platform_device *pdev = to_platform_device(dev);
-	const struct platform_device_id *id_entry =
-					platform_get_device_id(pdev);
+	struct rtc_omap_dev *rtc_omap = dev_get_drvdata(dev);
 
 	local_irq_disable();
-	rtc_wait_not_busy();
-	reg = rtc_read(OMAP_RTC_INTERRUPTS_REG);
-	if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN)
-		irqwake_reg = rtc_read(OMAP_RTC_IRQWAKEEN);
+	rtc_wait_not_busy(rtc_omap);
+	reg = rtc_read(rtc_omap, OMAP_RTC_INTERRUPTS_REG);
+	if (rtc_omap->pdata & OMAP_RTC_HAS_IRQWAKEEN)
+		irqwake_reg = rtc_read(rtc_omap, OMAP_RTC_IRQWAKEEN);
 
 	if (enabled) {
 		reg |= OMAP_RTC_INTERRUPTS_IT_ALARM;
@@ -189,10 +213,10 @@ static int omap_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
 		reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM;
 		irqwake_reg &= ~OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN;
 	}
-	rtc_wait_not_busy();
-	rtc_write(reg, OMAP_RTC_INTERRUPTS_REG);
-	if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN)
-		rtc_write(irqwake_reg, OMAP_RTC_IRQWAKEEN);
+	rtc_wait_not_busy(rtc_omap);
+	rtc_write(reg, rtc_omap, OMAP_RTC_INTERRUPTS_REG);
+	if (rtc_omap->pdata & OMAP_RTC_HAS_IRQWAKEEN)
+		rtc_write(irqwake_reg, rtc_omap, OMAP_RTC_IRQWAKEEN);
 	local_irq_enable();
 
 	return 0;
@@ -233,16 +257,18 @@ static void bcd2tm(struct rtc_time *tm)
 
 static int omap_rtc_read_time(struct device *dev, struct rtc_time *tm)
 {
+	struct rtc_omap_dev *rtc_omap = dev_get_drvdata(dev);
+
 	/* we don't report wday/yday/isdst ... */
 	local_irq_disable();
-	rtc_wait_not_busy();
+	rtc_wait_not_busy(rtc_omap);
 
-	tm->tm_sec = rtc_read(OMAP_RTC_SECONDS_REG);
-	tm->tm_min = rtc_read(OMAP_RTC_MINUTES_REG);
-	tm->tm_hour = rtc_read(OMAP_RTC_HOURS_REG);
-	tm->tm_mday = rtc_read(OMAP_RTC_DAYS_REG);
-	tm->tm_mon = rtc_read(OMAP_RTC_MONTHS_REG);
-	tm->tm_year = rtc_read(OMAP_RTC_YEARS_REG);
+	tm->tm_sec = rtc_read(rtc_omap, OMAP_RTC_SECONDS_REG);
+	tm->tm_min = rtc_read(rtc_omap, OMAP_RTC_MINUTES_REG);
+	tm->tm_hour = rtc_read(rtc_omap, OMAP_RTC_HOURS_REG);
+	tm->tm_mday = rtc_read(rtc_omap, OMAP_RTC_DAYS_REG);
+	tm->tm_mon = rtc_read(rtc_omap, OMAP_RTC_MONTHS_REG);
+	tm->tm_year = rtc_read(rtc_omap, OMAP_RTC_YEARS_REG);
 
 	local_irq_enable();
 
@@ -252,17 +278,19 @@ static int omap_rtc_read_time(struct device *dev, struct rtc_time *tm)
 
 static int omap_rtc_set_time(struct device *dev, struct rtc_time *tm)
 {
+	struct rtc_omap_dev *rtc_omap = dev_get_drvdata(dev);
+
 	if (tm2bcd(tm) < 0)
 		return -EINVAL;
 	local_irq_disable();
-	rtc_wait_not_busy();
+	rtc_wait_not_busy(rtc_omap);
 
-	rtc_write(tm->tm_year, OMAP_RTC_YEARS_REG);
-	rtc_write(tm->tm_mon, OMAP_RTC_MONTHS_REG);
-	rtc_write(tm->tm_mday, OMAP_RTC_DAYS_REG);
-	rtc_write(tm->tm_hour, OMAP_RTC_HOURS_REG);
-	rtc_write(tm->tm_min, OMAP_RTC_MINUTES_REG);
-	rtc_write(tm->tm_sec, OMAP_RTC_SECONDS_REG);
+	rtc_write(tm->tm_year, rtc_omap, OMAP_RTC_YEARS_REG);
+	rtc_write(tm->tm_mon, rtc_omap, OMAP_RTC_MONTHS_REG);
+	rtc_write(tm->tm_mday, rtc_omap, OMAP_RTC_DAYS_REG);
+	rtc_write(tm->tm_hour, rtc_omap, OMAP_RTC_HOURS_REG);
+	rtc_write(tm->tm_min, rtc_omap, OMAP_RTC_MINUTES_REG);
+	rtc_write(tm->tm_sec, rtc_omap, OMAP_RTC_SECONDS_REG);
 
 	local_irq_enable();
 
@@ -271,20 +299,22 @@ static int omap_rtc_set_time(struct device *dev, struct rtc_time *tm)
 
 static int omap_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
 {
+	struct rtc_omap_dev *rtc_omap = dev_get_drvdata(dev);
+
 	local_irq_disable();
-	rtc_wait_not_busy();
+	rtc_wait_not_busy(rtc_omap);
 
-	alm->time.tm_sec = rtc_read(OMAP_RTC_ALARM_SECONDS_REG);
-	alm->time.tm_min = rtc_read(OMAP_RTC_ALARM_MINUTES_REG);
-	alm->time.tm_hour = rtc_read(OMAP_RTC_ALARM_HOURS_REG);
-	alm->time.tm_mday = rtc_read(OMAP_RTC_ALARM_DAYS_REG);
-	alm->time.tm_mon = rtc_read(OMAP_RTC_ALARM_MONTHS_REG);
-	alm->time.tm_year = rtc_read(OMAP_RTC_ALARM_YEARS_REG);
+	alm->time.tm_sec = rtc_read(rtc_omap, OMAP_RTC_ALARM_SECONDS_REG);
+	alm->time.tm_min = rtc_read(rtc_omap, OMAP_RTC_ALARM_MINUTES_REG);
+	alm->time.tm_hour = rtc_read(rtc_omap, OMAP_RTC_ALARM_HOURS_REG);
+	alm->time.tm_mday = rtc_read(rtc_omap, OMAP_RTC_ALARM_DAYS_REG);
+	alm->time.tm_mon = rtc_read(rtc_omap, OMAP_RTC_ALARM_MONTHS_REG);
+	alm->time.tm_year = rtc_read(rtc_omap, OMAP_RTC_ALARM_YEARS_REG);
 
 	local_irq_enable();
 
 	bcd2tm(&alm->time);
-	alm->enabled = !!(rtc_read(OMAP_RTC_INTERRUPTS_REG)
+	alm->enabled = !!(rtc_read(rtc_omap, OMAP_RTC_INTERRUPTS_REG)
 			& OMAP_RTC_INTERRUPTS_IT_ALARM);
 
 	return 0;
@@ -293,26 +323,24 @@ static int omap_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
 static int omap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
 {
 	u8 reg, irqwake_reg = 0;
-	struct platform_device *pdev = to_platform_device(dev);
-	const struct platform_device_id *id_entry =
-					platform_get_device_id(pdev);
+	struct rtc_omap_dev *rtc_omap = dev_get_drvdata(dev);
 
 	if (tm2bcd(&alm->time) < 0)
 		return -EINVAL;
 
 	local_irq_disable();
-	rtc_wait_not_busy();
+	rtc_wait_not_busy(rtc_omap);
 
-	rtc_write(alm->time.tm_year, OMAP_RTC_ALARM_YEARS_REG);
-	rtc_write(alm->time.tm_mon, OMAP_RTC_ALARM_MONTHS_REG);
-	rtc_write(alm->time.tm_mday, OMAP_RTC_ALARM_DAYS_REG);
-	rtc_write(alm->time.tm_hour, OMAP_RTC_ALARM_HOURS_REG);
-	rtc_write(alm->time.tm_min, OMAP_RTC_ALARM_MINUTES_REG);
-	rtc_write(alm->time.tm_sec, OMAP_RTC_ALARM_SECONDS_REG);
+	rtc_write(alm->time.tm_year, rtc_omap, OMAP_RTC_ALARM_YEARS_REG);
+	rtc_write(alm->time.tm_mon, rtc_omap, OMAP_RTC_ALARM_MONTHS_REG);
+	rtc_write(alm->time.tm_mday, rtc_omap, OMAP_RTC_ALARM_DAYS_REG);
+	rtc_write(alm->time.tm_hour, rtc_omap, OMAP_RTC_ALARM_HOURS_REG);
+	rtc_write(alm->time.tm_min, rtc_omap, OMAP_RTC_ALARM_MINUTES_REG);
+	rtc_write(alm->time.tm_sec, rtc_omap, OMAP_RTC_ALARM_SECONDS_REG);
 
-	reg = rtc_read(OMAP_RTC_INTERRUPTS_REG);
-	if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN)
-		irqwake_reg = rtc_read(OMAP_RTC_IRQWAKEEN);
+	reg = rtc_read(rtc_omap, OMAP_RTC_INTERRUPTS_REG);
+	if (rtc_omap->pdata & OMAP_RTC_HAS_IRQWAKEEN)
+		irqwake_reg = rtc_read(rtc_omap, OMAP_RTC_IRQWAKEEN);
 
 	if (alm->enabled) {
 		reg |= OMAP_RTC_INTERRUPTS_IT_ALARM;
@@ -321,9 +349,9 @@ static int omap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
 		reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM;
 		irqwake_reg &= ~OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN;
 	}
-	rtc_write(reg, OMAP_RTC_INTERRUPTS_REG);
-	if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN)
-		rtc_write(irqwake_reg, OMAP_RTC_IRQWAKEEN);
+	rtc_write(reg, rtc_omap, OMAP_RTC_INTERRUPTS_REG);
+	if (rtc_omap->pdata & OMAP_RTC_HAS_IRQWAKEEN)
+		rtc_write(irqwake_reg, rtc_omap, OMAP_RTC_IRQWAKEEN);
 
 	local_irq_enable();
 
@@ -338,13 +366,10 @@ static struct rtc_class_ops omap_rtc_ops = {
 	.alarm_irq_enable = omap_rtc_alarm_irq_enable,
 };
 
-static int omap_rtc_alarm;
-static int omap_rtc_timer;
-
 #define	OMAP_RTC_DATA_AM3352_IDX	1
 #define	OMAP_RTC_DATA_DA830_IDX		2
 
-static struct platform_device_id omap_rtc_devtype[] = {
+static const struct platform_device_id omap_rtc_devtype[] = {
 	{
 		.name	= DRIVER_NAME,
 	},
@@ -375,11 +400,18 @@ MODULE_DEVICE_TABLE(of, omap_rtc_of_match);
 static int __init omap_rtc_probe(struct platform_device *pdev)
 {
 	struct resource		*res;
-	struct rtc_device	*rtc;
+	struct rtc_omap_dev	*rtc_omap;
 	u8			reg, new_ctrl;
 	const struct platform_device_id *id_entry;
 	const struct of_device_id *of_id;
 
+	rtc_omap = devm_kzalloc(&pdev->dev, sizeof(*rtc_omap), GFP_KERNEL);
+	if (!rtc_omap)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, rtc_omap);
+	rtc_omap->dev = &pdev->dev;
+
 	of_id = of_match_device(omap_rtc_of_match, &pdev->dev);
 	if (of_id)
 		pdev->id_entry = of_id->data;
@@ -389,78 +421,79 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
 		dev_err(&pdev->dev, "no matching device entry\n");
 		return -ENODEV;
 	}
+	rtc_omap->pdata = id_entry->driver_data;
 
-	omap_rtc_timer = platform_get_irq(pdev, 0);
-	if (omap_rtc_timer <= 0) {
+	rtc_omap->rtc_timer = platform_get_irq(pdev, 0);
+	if (rtc_omap->rtc_timer <= 0) {
 		pr_debug("%s: no update irq?\n", pdev->name);
 		return -ENOENT;
 	}
 
-	omap_rtc_alarm = platform_get_irq(pdev, 1);
-	if (omap_rtc_alarm <= 0) {
+	rtc_omap->rtc_alarm = platform_get_irq(pdev, 1);
+	if (rtc_omap->rtc_alarm <= 0) {
 		pr_debug("%s: no alarm irq?\n", pdev->name);
 		return -ENOENT;
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	rtc_base = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(rtc_base))
-		return PTR_ERR(rtc_base);
+	rtc_omap->rtc_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(rtc_omap->rtc_base))
+		return PTR_ERR(rtc_omap->rtc_base);
 
 	/* Enable the clock/module so that we can access the registers */
 	pm_runtime_enable(&pdev->dev);
 	pm_runtime_get_sync(&pdev->dev);
 
-	if (id_entry->driver_data & OMAP_RTC_HAS_KICKER) {
-		rtc_writel(KICK0_VALUE, OMAP_RTC_KICK0_REG);
-		rtc_writel(KICK1_VALUE, OMAP_RTC_KICK1_REG);
+	if (rtc_omap->pdata & OMAP_RTC_HAS_KICKER) {
+		rtc_writel(KICK0_VALUE, rtc_omap, OMAP_RTC_KICK0_REG);
+		rtc_writel(KICK1_VALUE, rtc_omap, OMAP_RTC_KICK1_REG);
 	}
 
-	rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
+	rtc_omap->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
 			&omap_rtc_ops, THIS_MODULE);
-	if (IS_ERR(rtc)) {
+	if (IS_ERR(rtc_omap->rtc)) {
 		pr_debug("%s: can't register RTC device, err %ld\n",
-			pdev->name, PTR_ERR(rtc));
+			pdev->name, PTR_ERR(rtc_omap->rtc));
 		goto fail0;
 	}
-	platform_set_drvdata(pdev, rtc);
 
 	/* clear pending irqs, and set 1/second periodic,
 	 * which we'll use instead of update irqs
 	 */
-	rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
+	rtc_write(0, rtc_omap, OMAP_RTC_INTERRUPTS_REG);
 
 	/* enable RTC functional clock */
-	if (id_entry->driver_data & OMAP_RTC_HAS_32KCLK_EN)
-		rtc_writel(OMAP_RTC_OSC_32KCLK_EN, OMAP_RTC_OSC_REG);
+	if (rtc_omap->pdata & OMAP_RTC_HAS_32KCLK_EN)
+		rtc_writel(OMAP_RTC_OSC_32KCLK_EN, rtc_omap, OMAP_RTC_OSC_REG);
 
 	/* clear old status */
-	reg = rtc_read(OMAP_RTC_STATUS_REG);
+	reg = rtc_read(rtc_omap, OMAP_RTC_STATUS_REG);
 	if (reg & (u8) OMAP_RTC_STATUS_POWER_UP) {
 		pr_info("%s: RTC power up reset detected\n",
 			pdev->name);
-		rtc_write(OMAP_RTC_STATUS_POWER_UP, OMAP_RTC_STATUS_REG);
+		rtc_write(OMAP_RTC_STATUS_POWER_UP, rtc_omap,
+			  OMAP_RTC_STATUS_REG);
 	}
 	if (reg & (u8) OMAP_RTC_STATUS_ALARM)
-		rtc_write(OMAP_RTC_STATUS_ALARM, OMAP_RTC_STATUS_REG);
+		rtc_write(OMAP_RTC_STATUS_ALARM, rtc_omap, OMAP_RTC_STATUS_REG);
 
 	/* handle periodic and alarm irqs */
-	if (devm_request_irq(&pdev->dev, omap_rtc_timer, rtc_irq, 0,
-			dev_name(&rtc->dev), rtc)) {
+	if (devm_request_irq(&pdev->dev, rtc_omap->rtc_timer, rtc_irq, 0,
+			     dev_name(&pdev->dev), rtc_omap)) {
 		pr_debug("%s: RTC timer interrupt IRQ%d already claimed\n",
-			pdev->name, omap_rtc_timer);
+			pdev->name, rtc_omap->rtc_timer);
 		goto fail0;
 	}
-	if ((omap_rtc_timer != omap_rtc_alarm) &&
-		(devm_request_irq(&pdev->dev, omap_rtc_alarm, rtc_irq, 0,
-			dev_name(&rtc->dev), rtc))) {
+	if ((rtc_omap->rtc_timer != rtc_omap->rtc_alarm) &&
+	    (devm_request_irq(&pdev->dev, rtc_omap->rtc_alarm, rtc_irq, 0,
+			      dev_name(&pdev->dev), rtc_omap))) {
 		pr_debug("%s: RTC alarm interrupt IRQ%d already claimed\n",
-			pdev->name, omap_rtc_alarm);
+			pdev->name, rtc_omap->rtc_alarm);
 		goto fail0;
 	}
 
 	/* On boards with split power, RTC_ON_NOFF won't reset the RTC */
-	reg = rtc_read(OMAP_RTC_CTRL_REG);
+	reg = rtc_read(rtc_omap, OMAP_RTC_CTRL_REG);
 	if (reg & (u8) OMAP_RTC_CTRL_STOP)
 		pr_info("%s: already running\n", pdev->name);
 
@@ -488,13 +521,13 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
 		pr_info("%s: split power mode\n", pdev->name);
 
 	if (reg != new_ctrl)
-		rtc_write(new_ctrl, OMAP_RTC_CTRL_REG);
+		rtc_write(new_ctrl, rtc_omap, OMAP_RTC_CTRL_REG);
 
 	return 0;
 
 fail0:
-	if (id_entry->driver_data & OMAP_RTC_HAS_KICKER)
-		rtc_writel(0, OMAP_RTC_KICK0_REG);
+	if (rtc_omap->pdata & OMAP_RTC_HAS_KICKER)
+		rtc_writel(0, rtc_omap, OMAP_RTC_KICK0_REG);
 	pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
 	return -EIO;
@@ -502,16 +535,15 @@ fail0:
 
 static int __exit omap_rtc_remove(struct platform_device *pdev)
 {
-	const struct platform_device_id *id_entry =
-				platform_get_device_id(pdev);
+	struct rtc_omap_dev *rtc_omap = platform_get_drvdata(pdev);
 
 	device_init_wakeup(&pdev->dev, 0);
 
 	/* leave rtc running, but disable irqs */
-	rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
+	rtc_write(0, rtc_omap, OMAP_RTC_INTERRUPTS_REG);
 
-	if (id_entry->driver_data & OMAP_RTC_HAS_KICKER)
-		rtc_writel(0, OMAP_RTC_KICK0_REG);
+	if (rtc_omap->pdata & OMAP_RTC_HAS_KICKER)
+		rtc_writel(0, rtc_omap, OMAP_RTC_KICK0_REG);
 
 	/* Disable the clock/module */
 	pm_runtime_put_sync(&pdev->dev);
@@ -521,20 +553,21 @@ static int __exit omap_rtc_remove(struct platform_device *pdev)
 }
 
 #ifdef CONFIG_PM_SLEEP
-static u8 irqstat;
 
 static int omap_rtc_suspend(struct device *dev)
 {
-	irqstat = rtc_read(OMAP_RTC_INTERRUPTS_REG);
+	struct rtc_omap_dev *rtc_omap = dev_get_drvdata(dev);
+
+	rtc_omap->irqstat = rtc_read(rtc_omap, OMAP_RTC_INTERRUPTS_REG);
 
 	/* FIXME the RTC alarm is not currently acting as a wakeup event
 	 * source on some platforms, and in fact this enable() call is just
 	 * saving a flag that's never used...
 	 */
 	if (device_may_wakeup(dev))
-		enable_irq_wake(omap_rtc_alarm);
+		enable_irq_wake(rtc_omap->rtc_alarm);
 	else
-		rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
+		rtc_write(0, rtc_omap, OMAP_RTC_INTERRUPTS_REG);
 
 	/* Disable the clock/module */
 	pm_runtime_put_sync(dev);
@@ -544,13 +577,15 @@ static int omap_rtc_suspend(struct device *dev)
 
 static int omap_rtc_resume(struct device *dev)
 {
+	struct rtc_omap_dev *rtc_omap = dev_get_drvdata(dev);
+
 	/* Enable the clock/module so that we can access the registers */
 	pm_runtime_get_sync(dev);
 
 	if (device_may_wakeup(dev))
-		disable_irq_wake(omap_rtc_alarm);
+		disable_irq_wake(rtc_omap->rtc_alarm);
 	else
-		rtc_write(irqstat, OMAP_RTC_INTERRUPTS_REG);
+		rtc_write(rtc_omap->irqstat, rtc_omap, OMAP_RTC_INTERRUPTS_REG);
 
 	return 0;
 }
@@ -560,10 +595,11 @@ static SIMPLE_DEV_PM_OPS(omap_rtc_pm_ops, omap_rtc_suspend, omap_rtc_resume);
 
 static void omap_rtc_shutdown(struct platform_device *pdev)
 {
-	rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
+	struct rtc_omap_dev *rtc_omap = platform_get_drvdata(pdev);
+
+	rtc_write(0, rtc_omap, OMAP_RTC_INTERRUPTS_REG);
 }
 
-MODULE_ALIAS("platform:omap_rtc");
 static struct platform_driver omap_rtc_driver = {
 	.remove		= __exit_p(omap_rtc_remove),
 	.shutdown	= omap_rtc_shutdown,
@@ -578,5 +614,6 @@ static struct platform_driver omap_rtc_driver = {
 
 module_platform_driver_probe(omap_rtc_driver, omap_rtc_probe);
 
+MODULE_ALIAS("platform:omap_rtc");
 MODULE_AUTHOR("George G. Davis (and others)");
 MODULE_LICENSE("GPL");
-- 
1.9.1

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