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| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2019-01-25 15:35:58 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-27 14:46:17 +0100 |
| commit | 0b9eaf82c2a711fcd2c6d011bac59bbc7d26be83 (patch) | |
| tree | 70ff6730ed4c35bf43801e38c42c3a2f7fda8172 /drivers/rtc | |
| parent | 391fd358568db5b98464b26c8fca0b2c03f6fef4 (diff) | |
| download | linux-stable-0b9eaf82c2a711fcd2c6d011bac59bbc7d26be83.tar.gz linux-stable-0b9eaf82c2a711fcd2c6d011bac59bbc7d26be83.tar.bz2 linux-stable-0b9eaf82c2a711fcd2c6d011bac59bbc7d26be83.zip | |
rtc: ds1307: rx8130: Fix alarm handling
[ Upstream commit 3f929cad943380370b6db31fcb7a38d898d91089 ]
When the EXTENSION.WADA bit is set, register 0x19 contains a bitmap of
week days, not a day of month. As Linux only handles a single alarm
without repetition using day of month is more flexible, so clear this
bit. (Otherwise a value depending on time.tm_wday would have to be
written to register 0x19.)
Also optimize setting the AIE bit to use a single register write instead
of a bulk write of three registers.
Fixes: ee0981be7704 ("rtc: ds1307: Add support for Epson RX8130CE")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-ds1307.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c index e7d9215c9201..8d45d93b1db6 100644 --- a/drivers/rtc/rtc-ds1307.c +++ b/drivers/rtc/rtc-ds1307.c @@ -733,8 +733,8 @@ static int rx8130_set_alarm(struct device *dev, struct rtc_wkalrm *t) if (ret < 0) return ret; - ctl[0] &= ~RX8130_REG_EXTENSION_WADA; - ctl[1] |= RX8130_REG_FLAG_AF; + ctl[0] &= RX8130_REG_EXTENSION_WADA; + ctl[1] &= ~RX8130_REG_FLAG_AF; ctl[2] &= ~RX8130_REG_CONTROL0_AIE; ret = regmap_bulk_write(ds1307->regmap, RX8130_REG_EXTENSION, ctl, @@ -757,8 +757,7 @@ static int rx8130_set_alarm(struct device *dev, struct rtc_wkalrm *t) ctl[2] |= RX8130_REG_CONTROL0_AIE; - return regmap_bulk_write(ds1307->regmap, RX8130_REG_EXTENSION, ctl, - sizeof(ctl)); + return regmap_write(ds1307->regmap, RX8130_REG_CONTROL0, ctl[2]); } static int rx8130_alarm_irq_enable(struct device *dev, unsigned int enabled) |