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

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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
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15
drivers/rtc/rtc-pcf2127.c
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@ -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;