[rtc-linux] [PATCH v2] rtc: pcf2127: bulk read only date and time registers.
flat view
From: Sean Nyekjaer <hidden>
Date: 2017-02-23 14:01:41
Subsystem:
real time clock (rtc) subsystem, the rest · Maintainers:
Alexandre Belloni, Linus Torvalds
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 <redacted> --- Changes since v1: - fixed indentation - use of more defines drivers/rtc/rtc-pcf2127.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/drivers/rtc/rtc-pcf2127.c b/drivers/rtc/rtc-pcf2127.c
index 2bfdf638b673..f33447c5db85 100644
--- a/drivers/rtc/rtc-pcf2127.c
+++ b/drivers/rtc/rtc-pcf2127.c@@ -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;
--
2.11.0
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