On Tue, 12 Aug 2014 11:01:07 +0900 y@xxxxxxxxxxx wrote:
> This patch define s3c_rtc structure including necessary variables for S3C RTC
> device instead of global variables. This patch improves the readability by
> removing global variables.
Below is the v1->v2 delta.
Why were all those tests of info->base added? Can it really be zero?
I don't see how.
--- a/drivers/rtc/rtc-s3c.c~rtc-s3c-define-s3c_rtc-structure-to-remove-global-variables-v2
+++ a/drivers/rtc/rtc-s3c.c
@@ -121,6 +121,9 @@ static int s3c_rtc_setaie(struct device
struct s3c_rtc *info = dev_get_drvdata(dev);
unsigned int tmp;
+ if (!info->base)
+ return -EINVAL;
+
dev_dbg(info->dev, "%s: aie=%d\n", __func__, enabled);
clk_enable(info->rtc_clk);
@@ -180,6 +183,9 @@ static int s3c_rtc_gettime(struct device
struct s3c_rtc *info = dev_get_drvdata(dev);
unsigned int have_retried = 0;
+ if (!info->base)
+ return -EINVAL;
+
clk_enable(info->rtc_clk);
retry_get_time:
rtc_tm->tm_min = readb(info->base + S3C2410_RTCMIN);
@@ -224,6 +230,9 @@ static int s3c_rtc_settime(struct device
struct s3c_rtc *info = dev_get_drvdata(dev);
int year = tm->tm_year - 100;
+ if (!info->base)
+ return -EINVAL;
+
dev_dbg(dev, "set time %04d.%02d.%02d %02d:%02d:%02d\n",
1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
@@ -255,6 +264,9 @@ static int s3c_rtc_getalarm(struct devic
struct rtc_time *alm_tm = &alrm->time;
unsigned int alm_en;
+ if (!info->base)
+ return -EINVAL;
+
clk_enable(info->rtc_clk);
alm_tm->tm_sec = readb(info->base + S3C2410_ALMSEC);
alm_tm->tm_min = readb(info->base + S3C2410_ALMMIN);
@@ -317,6 +329,9 @@ static int s3c_rtc_setalarm(struct devic
struct rtc_time *tm = &alrm->time;
unsigned int alrm_en;
+ if (!info->base)
+ return -EINVAL;
+
clk_enable(info->rtc_clk);
dev_dbg(dev, "s3c_rtc_setalarm: %d, %04d.%02d.%02d %02d:%02d:%02d\n",
alrm->enabled,
@@ -357,6 +372,9 @@ static int s3c_rtc_proc(struct device *d
struct s3c_rtc *info = dev_get_drvdata(dev);
unsigned int ticnt;
+ if (!info->base)
+ return -EINVAL;
+
clk_enable(info->rtc_clk);
if (info->cpu_type == TYPE_S3C64XX) {
ticnt = readw(info->base + S3C2410_RTCCON);
@@ -548,7 +566,7 @@ static int s3c_rtc_probe(struct platform
rtc_tm.tm_min = 0;
rtc_tm.tm_sec = 0;
- s3c_rtc_settime(NULL, &rtc_tm);
+ s3c_rtc_settime(&pdev->dev, &rtc_tm);
dev_warn(&pdev->dev, "warning: invalid RTC value so initializing it\n");
}
_
--
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