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rtc: ds1307: Fix wday settings for rx8130

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[ Upstream commit 204756f016726a380bafe619438ed979088bd04a ]

rx8130 wday specifies the bit position, not BCD.

Fixes: ee0981be7704 ("rtc: ds1307: Add support for Epson RX8130CE")
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210420023917.1949066-1-nobuhiro1.iwamatsu@toshiba.co.jp
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Nobuhiro Iwamatsu 2021-04-20 11:39:17 +09:00 committed by Greg Kroah-Hartman
parent 2ad8af2b70
commit 3dd2cd6446
1 changed files with 10 additions and 2 deletions
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12
drivers/rtc/rtc-ds1307.c
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@ -265,7 +265,11 @@ static int ds1307_get_time(struct device *dev, struct rtc_time *t)
t->tm_min = bcd2bin(regs[DS1307_REG_MIN] & 0x7f);
tmp = regs[DS1307_REG_HOUR] & 0x3f;
t->tm_hour = bcd2bin(tmp);
t->tm_wday = bcd2bin(regs[DS1307_REG_WDAY] & 0x07) - 1;
/* rx8130 is bit position, not BCD */
if (ds1307->type == rx_8130)
t->tm_wday = fls(regs[DS1307_REG_WDAY] & 0x7f);
else
t->tm_wday = bcd2bin(regs[DS1307_REG_WDAY] & 0x07) - 1;
t->tm_mday = bcd2bin(regs[DS1307_REG_MDAY] & 0x3f);
tmp = regs[DS1307_REG_MONTH] & 0x1f;
t->tm_mon = bcd2bin(tmp) - 1;
@ -312,7 +316,11 @@ static int ds1307_set_time(struct device *dev, struct rtc_time *t)
regs[DS1307_REG_SECS] = bin2bcd(t->tm_sec);
regs[DS1307_REG_MIN] = bin2bcd(t->tm_min);
regs[DS1307_REG_HOUR] = bin2bcd(t->tm_hour);
regs[DS1307_REG_WDAY] = bin2bcd(t->tm_wday + 1);
/* rx8130 is bit position, not BCD */
if (ds1307->type == rx_8130)
regs[DS1307_REG_WDAY] = 1 << t->tm_wday;
else
regs[DS1307_REG_WDAY] = bin2bcd(t->tm_wday + 1);
regs[DS1307_REG_MDAY] = bin2bcd(t->tm_mday);
regs[DS1307_REG_MONTH] = bin2bcd(t->tm_mon + 1);