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

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); struct pcf2127 *pcf2127 = dev_get_drvdata(dev);
unsigned char buf[10]; unsigned char buf[10];
int ret; int ret;
int i;
ret = regmap_bulk_read(pcf2127->regmap, PCF2127_REG_CTRL1, buf, for (i = 0; i <= PCF2127_REG_CTRL3; i++) {
sizeof(buf)); 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) { if (ret) {
dev_err(dev, "%s: read error\n", __func__); dev_err(dev, "%s: read error\n", __func__);
return ret; return ret;