Re: [RFC] RTC: class driver for Samsung S3C series SoC

[Andrew Morton]

Ben Dooks <ben@xxxxxxxxxxxx> wrote:
>
> This is a renamed and tested version of the
> previous S3C24XX RTC class driver.
> 
> The driver has been renamed from the original
> s3c2410-rtc, which is now too narrow for the
> range of devices supported.
> 
> The rtc-s3c has been chosen as there is the
> distinct possibility of this driver being
> carried forward into newer Samsung SoC
> silicon.
> 
> +#undef S3C24XX_VA_RTC
> +#define S3C24XX_VA_RTC s3c_rtc_base

This appears to be unused?

> +static int s3c_rtc_open(struct device *dev)
> +{
> +	struct platform_device *pdev = to_platform_device(dev);
> +	struct rtc_device *rtc_dev = platform_get_drvdata(pdev);
> +	int ret;
> +
> +	ret = request_irq(s3c_rtc_alarmno, s3c_rtc_alarmirq,
> +			  SA_INTERRUPT,  "s3c2410-rtc alarm", rtc_dev);
> +
> +	if (ret)
> +		dev_err(dev, "IRQ%d error %d\n", s3c_rtc_alarmno, ret);

I suspect you wanted a `return ret;' here.

> +	ret = request_irq(s3c_rtc_tickno, s3c_rtc_tickirq,
> +			  SA_INTERRUPT,  "s3c2410-rtc tick", rtc_dev);
> +
> +	if (ret) {
> +		dev_err(dev, "IRQ%d error %d\n", s3c_rtc_tickno, ret);
> +		goto tick_err;
> +	}
> +
> +	return ret;
> +
> + tick_err:
> +	free_irq(s3c_rtc_alarmno, rtc_dev);
> +	return ret;
> +}

Are you sure you want spaces in the interrupt identifiers?  It'll make
parsing of /proc/interrupts harder, although I don't know that we're at all
consistent about that.


From: Andrew Morton <akpm@xxxxxxxx>

Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---

 drivers/rtc/rtc-s3c.c |   36 ++++++++++++++----------------------
 1 files changed, 14 insertions(+), 22 deletions(-)

diff -puN drivers/rtc/rtc-s3c.c~rtc-class-driver-for-samsung-s3c-series-soc-tidy drivers/rtc/rtc-s3c.c
--- a/drivers/rtc/rtc-s3c.c~rtc-class-driver-for-samsung-s3c-series-soc-tidy
+++ a/drivers/rtc/rtc-s3c.c
@@ -34,9 +34,6 @@
 /* I have yet to find an S3C implementation with more than one
  * of these rtc blocks in */
 
-#undef S3C24XX_VA_RTC
-#define S3C24XX_VA_RTC s3c_rtc_base
-
 static struct resource *s3c_rtc_mem;
 
 static void __iomem *s3c_rtc_base;
@@ -45,6 +42,7 @@ static int s3c_rtc_tickno  = NO_IRQ;
 static int s3c_rtc_freq    = 1;
 
 static DEFINE_SPINLOCK(s3c_rtc_pie_lock);
+static unsigned int tick_count;
 
 /* IRQ Handlers */
 
@@ -56,8 +54,6 @@ static irqreturn_t s3c_rtc_alarmirq(int 
 	return IRQ_HANDLED;
 }
 
-static unsigned int tick_count;
-
 static irqreturn_t s3c_rtc_tickirq(int irq, void *id, struct pt_regs *r)
 {
 	struct rtc_device *rdev = id;
@@ -153,7 +149,6 @@ static int s3c_rtc_gettime(struct device
 	return 0;
 }
 
-
 static int s3c_rtc_settime(struct device *dev, struct rtc_time *tm)
 {
 	/* the rtc gets round the y2k problem by just not supporting it */
@@ -193,29 +188,25 @@ static int s3c_rtc_getalarm(struct devic
 
 	/* decode the alarm enable field */
 
-	if (alm_en & S3C2410_RTCALM_SECEN) {
+	if (alm_en & S3C2410_RTCALM_SECEN)
 		BCD_TO_BIN(alm_tm->tm_sec);
-	} else {
+	else
 		alm_tm->tm_sec = 0xff;
-	}
 
-	if (alm_en & S3C2410_RTCALM_MINEN) {
+	if (alm_en & S3C2410_RTCALM_MINEN)
 		BCD_TO_BIN(alm_tm->tm_min);
-	} else {
+	else
 		alm_tm->tm_min = 0xff;
-	}
 
-	if (alm_en & S3C2410_RTCALM_HOUREN) {
+	if (alm_en & S3C2410_RTCALM_HOUREN)
 		BCD_TO_BIN(alm_tm->tm_hour);
-	} else {
+	else
 		alm_tm->tm_hour = 0xff;
-	}
 
-	if (alm_en & S3C2410_RTCALM_DAYEN) {
+	if (alm_en & S3C2410_RTCALM_DAYEN)
 		BCD_TO_BIN(alm_tm->tm_mday);
-	} else {
+	else
 		alm_tm->tm_mday = 0xff;
-	}
 
 	if (alm_en & S3C2410_RTCALM_MONEN) {
 		BCD_TO_BIN(alm_tm->tm_mon);
@@ -224,11 +215,10 @@ static int s3c_rtc_getalarm(struct devic
 		alm_tm->tm_mon = 0xff;
 	}
 
-	if (alm_en & S3C2410_RTCALM_YEAREN) {
+	if (alm_en & S3C2410_RTCALM_YEAREN)
 		BCD_TO_BIN(alm_tm->tm_year);
-	} else {
+	else
 		alm_tm->tm_year = 0xffff;
-	}
 
 	return 0;
 }
@@ -352,8 +342,10 @@ static int s3c_rtc_open(struct device *d
 	ret = request_irq(s3c_rtc_alarmno, s3c_rtc_alarmirq,
 			  SA_INTERRUPT,  "s3c2410-rtc alarm", rtc_dev);
 
-	if (ret)
+	if (ret) {
 		dev_err(dev, "IRQ%d error %d\n", s3c_rtc_alarmno, ret);
+		return ret;
+	}
 
 	ret = request_irq(s3c_rtc_tickno, s3c_rtc_tickirq,
 			  SA_INTERRUPT,  "s3c2410-rtc tick", rtc_dev);
_

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