leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

rtc: pcf2127: bulk read only date and time registers.

Browse Source 
Read control registers one by one and bulk read time registers.
This fixes when the clock is read, the watchdog counter register is zeroed.

Signed-off-by: Sean Nyekjaer <sean.nyekjaer@prevas.dk>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
This commit is contained in:
Sean Nyekjaer 2017-02-23 15:01:24 +01:00 committed by Alexandre Belloni
parent 34f54f579a
commit 3769a375ab
1 changed files with 13 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/rtc/rtc-pcf2127.c
View File

@ -52,9 +52,20 @@ static int pcf2127_rtc_read_time(struct device *dev, struct rtc_time *tm)
struct pcf2127 *pcf2127 = dev_get_drvdata(dev);
unsigned char buf[10];
int ret;
int i;
ret = regmap_bulk_read(pcf2127->regmap, PCF2127_REG_CTRL1, buf,
sizeof(buf));
for (i = 0; i <= PCF2127_REG_CTRL3; i++) {
ret = regmap_read(pcf2127->regmap, PCF2127_REG_CTRL1 + i,
(unsigned int *)(buf + i));
if (ret) {
dev_err(dev, "%s: read error\n", __func__);
return ret;
}
}
ret = regmap_bulk_read(pcf2127->regmap, PCF2127_REG_SC,
(buf + PCF2127_REG_SC),
ARRAY_SIZE(buf) - PCF2127_REG_SC);
if (ret) {
dev_err(dev, "%s: read error\n", __func__);
return ret;