rtc-at91rm9200: refactor interrupt-register handling

Add accessors for the interrupt register. This will allow us to easily add a shadow interrupt-mask register to use on SoCs where the interrupt-mask register cannot be used. Signed-off-by: Johan Hovold <jhovold@gmail.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Douglas Gilbert <dgilbert@interlog.com> Cc: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Cc: Ludovic Desroches <ludovic.desroches@atmel.com> Cc: Robert Nelson <Robert.Nelson@digikey.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Author: jhovold

drivers/rtc/rtc-at91rm9200.c

@@ -51,6 +51,21 @@ static unsigned int at91_alarm_year = AT91_RTC_EPOCH;
 static void __iomem *at91_rtc_regs;
 static int irq;
 
+static void at91_rtc_write_ier(u32 mask)
+{
+at91_rtc_write(AT91_RTC_IER, mask);
+}
+
+static void at91_rtc_write_idr(u32 mask)
+{
+at91_rtc_write(AT91_RTC_IDR, mask);
+}
+
+static u32 at91_rtc_read_imr(void)
+{
+return at91_rtc_read(AT91_RTC_IMR);
+}
+
 /*
  * Decode time/date into rtc_time structure
  */
@@ -114,9 +129,9 @@ static int at91_rtc_settime(struct device *dev, struct rtc_time *tm)
 cr = at91_rtc_read(AT91_RTC_CR);
 at91_rtc_write(AT91_RTC_CR, cr | AT91_RTC_UPDCAL | AT91_RTC_UPDTIM);
 
-at91_rtc_write(AT91_RTC_IER, AT91_RTC_ACKUPD);
+at91_rtc_write_ier(AT91_RTC_ACKUPD);
 wait_for_completion(&at91_rtc_updated);/* wait for ACKUPD interrupt */
-at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ACKUPD);
+at91_rtc_write_idr(AT91_RTC_ACKUPD);
 
 at91_rtc_write(AT91_RTC_TIMR,
  bin2bcd(tm->tm_sec) << 0
@@ -148,7 +163,7 @@ static int at91_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm)
 tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, tm->tm_year);
 tm->tm_year = at91_alarm_year - 1900;
 
-alrm->enabled = (at91_rtc_read(AT91_RTC_IMR) & AT91_RTC_ALARM)
+alrm->enabled = (at91_rtc_read_imr() & AT91_RTC_ALARM)
 ? 1 : 0;
 
 dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,
@@ -173,7 +188,7 @@ static int at91_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
 tm.tm_min = alrm->time.tm_min;
 tm.tm_sec = alrm->time.tm_sec;
 
-at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ALARM);
+at91_rtc_write_idr(AT91_RTC_ALARM);
 at91_rtc_write(AT91_RTC_TIMALR,
  bin2bcd(tm.tm_sec) << 0
 | bin2bcd(tm.tm_min) << 8
@@ -186,7 +201,7 @@ static int at91_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
 
 if (alrm->enabled) {
 at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_ALARM);
-at91_rtc_write(AT91_RTC_IER, AT91_RTC_ALARM);
+at91_rtc_write_ier(AT91_RTC_ALARM);
 }
 
 dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,
@@ -202,9 +217,9 @@ static int at91_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
 
 if (enabled) {
 at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_ALARM);
-at91_rtc_write(AT91_RTC_IER, AT91_RTC_ALARM);
+at91_rtc_write_ier(AT91_RTC_ALARM);
 } else
-at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ALARM);
+at91_rtc_write_idr(AT91_RTC_ALARM);
 
 return 0;
 }
@@ -213,7 +228,7 @@ static int at91_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
  */
 static int at91_rtc_proc(struct device *dev, struct seq_file *seq)
 {
-unsigned long imr = at91_rtc_read(AT91_RTC_IMR);
+unsigned long imr = at91_rtc_read_imr();
 
 seq_printf(seq, "update_IRQ\t: %s\n",
 (imr & AT91_RTC_ACKUPD) ? "yes" : "no");
@@ -233,7 +248,7 @@ static irqreturn_t at91_rtc_interrupt(int irq, void *dev_id)
 unsigned int rtsr;
 unsigned long events = 0;
 
-rtsr = at91_rtc_read(AT91_RTC_SR) & at91_rtc_read(AT91_RTC_IMR);
+rtsr = at91_rtc_read(AT91_RTC_SR) & at91_rtc_read_imr();
 if (rtsr) {/* this interrupt is shared! Is it ours? */
 if (rtsr & AT91_RTC_ALARM)
 events |= (RTC_AF | RTC_IRQF);
@@ -328,7 +343,7 @@ static int __init at91_rtc_probe(struct platform_device *pdev)
 at91_rtc_write(AT91_RTC_MR, 0);/* 24 hour mode */
 
 /* Disable all interrupts */
-at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ACKUPD | AT91_RTC_ALARM |
+at91_rtc_write_idr(AT91_RTC_ACKUPD | AT91_RTC_ALARM |
 AT91_RTC_SECEV | AT91_RTC_TIMEV |
 AT91_RTC_CALEV);
 
@@ -373,7 +388,7 @@ static int __exit at91_rtc_remove(struct platform_device *pdev)
 struct rtc_device *rtc = platform_get_drvdata(pdev);
 
 /* Disable all interrupts */
-at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ACKUPD | AT91_RTC_ALARM |
+at91_rtc_write_idr(AT91_RTC_ACKUPD | AT91_RTC_ALARM |
 AT91_RTC_SECEV | AT91_RTC_TIMEV |
 AT91_RTC_CALEV);
 free_irq(irq, pdev);
@@ -396,13 +411,13 @@ static int at91_rtc_suspend(struct device *dev)
 /* this IRQ is shared with DBGU and other hardware which isn't
  * necessarily doing PM like we are...
  */
-at91_rtc_imr = at91_rtc_read(AT91_RTC_IMR)
+at91_rtc_imr = at91_rtc_read_imr()
 & (AT91_RTC_ALARM|AT91_RTC_SECEV);
 if (at91_rtc_imr) {
 if (device_may_wakeup(dev))
 enable_irq_wake(irq);
 else
-at91_rtc_write(AT91_RTC_IDR, at91_rtc_imr);
+at91_rtc_write_idr(at91_rtc_imr);
 }
 return 0;
 }
@@ -413,7 +428,7 @@ static int at91_rtc_resume(struct device *dev)
 if (device_may_wakeup(dev))
 disable_irq_wake(irq);
 else
-at91_rtc_write(AT91_RTC_IER, at91_rtc_imr);
+at91_rtc_write_ier(at91_rtc_imr);
 }
 return 0;
 }