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>

1 files changed, 29 insertions, 14 deletions

diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c
index ab2024b159fa..9592d08f3b11 100644
--- a/drivers/rtc/rtc-at91rm9200.c
+++ b/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;
 }