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Date: Wed, 3 Apr 2013 12:03:33 +0200
From: Johan Hovold <jhovold@...il.com>
To: Nicolas Ferre <nicolas.ferre@...el.com>
Cc: Douglas Gilbert <dgilbert@...erlog.com>,
Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>,
Ludovic Desroches <ludovic.desroches@...el.com>,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Johan Hovold <jhovold@...il.com>
Subject: [RFC v2 2/4] 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@...il.com>
---
drivers/rtc/rtc-at91rm9200.c | 43 +++++++++++++++++++++++++++++--------------
1 file changed, 29 insertions(+), 14 deletions(-)
diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c
index 26e560c..46576ff 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);
@@ -326,7 +341,7 @@ 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);
@@ -364,7 +379,7 @@ 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);
@@ -386,13 +401,13 @@ 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;
}
@@ -403,7 +418,7 @@ 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;
}
--
1.8.1.5
--
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