rtc: simplify getting .drvdata

We should get drvdata from struct device directly. Going via
platform_device is an unneeded step back and forth.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Michal Simek <michal.simek@xilinx.com> (for zynqmp)
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
diff --git a/drivers/rtc/rtc-pcap.c b/drivers/rtc/rtc-pcap.c
index c05f524..f176cb9 100644
--- a/drivers/rtc/rtc-pcap.c
+++ b/drivers/rtc/rtc-pcap.c
@@ -43,8 +43,7 @@ static irqreturn_t pcap_rtc_irq(int irq, void *_pcap_rtc)
 
 static int pcap_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct pcap_rtc *pcap_rtc = platform_get_drvdata(pdev);
+	struct pcap_rtc *pcap_rtc = dev_get_drvdata(dev);
 	struct rtc_time *tm = &alrm->time;
 	unsigned long secs;
 	u32 tod;	/* time of day, seconds since midnight */
@@ -63,8 +62,7 @@ static int pcap_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 
 static int pcap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct pcap_rtc *pcap_rtc = platform_get_drvdata(pdev);
+	struct pcap_rtc *pcap_rtc = dev_get_drvdata(dev);
 	struct rtc_time *tm = &alrm->time;
 	unsigned long secs;
 	u32 tod, days;
@@ -82,8 +80,7 @@ static int pcap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 
 static int pcap_rtc_read_time(struct device *dev, struct rtc_time *tm)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct pcap_rtc *pcap_rtc = platform_get_drvdata(pdev);
+	struct pcap_rtc *pcap_rtc = dev_get_drvdata(dev);
 	unsigned long secs;
 	u32 tod, days;
 
@@ -100,8 +97,7 @@ static int pcap_rtc_read_time(struct device *dev, struct rtc_time *tm)
 
 static int pcap_rtc_set_mmss(struct device *dev, unsigned long secs)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct pcap_rtc *pcap_rtc = platform_get_drvdata(pdev);
+	struct pcap_rtc *pcap_rtc = dev_get_drvdata(dev);
 	u32 tod, days;
 
 	tod = secs % SEC_PER_DAY;
@@ -115,8 +111,7 @@ static int pcap_rtc_set_mmss(struct device *dev, unsigned long secs)
 
 static int pcap_rtc_irq_enable(struct device *dev, int pirq, unsigned int en)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct pcap_rtc *pcap_rtc = platform_get_drvdata(pdev);
+	struct pcap_rtc *pcap_rtc = dev_get_drvdata(dev);
 
 	if (en)
 		enable_irq(pcap_to_irq(pcap_rtc->pcap, pirq));