[rtc-linux] [PATCH 06/15] rtc: rx8025: only handle dates between 2000 and 2099
From: Alexandre Belloni <hidden>
Date: 2015-08-04 09:45:54
Also in:
lkml
Subsystem:
real time clock (rtc) subsystem, the rest · Maintainers:
Alexandre Belloni, Linus Torvalds
The hardware is only capable of handling dates between 2000 and 2099, enforce that. Signed-off-by: Alexandre Belloni <redacted> --- drivers/rtc/rtc-rx8025.c | 14 ++++---------- 1 file changed, 4 insertions(+), 10 deletions(-)
diff --git a/drivers/rtc/rtc-rx8025.c b/drivers/rtc/rtc-rx8025.c
index 52683eda1da2..3612362b65ac 100644
--- a/drivers/rtc/rtc-rx8025.c
+++ b/drivers/rtc/rtc-rx8025.c@@ -188,10 +188,7 @@ static int rx8025_get_time(struct device *dev, struct rtc_time *dt) dt->tm_mday = bcd2bin(date[RX8025_REG_MDAY] & 0x3f); dt->tm_mon = bcd2bin(date[RX8025_REG_MONTH] & 0x1f) - 1; - dt->tm_year = bcd2bin(date[RX8025_REG_YEAR]); - - if (dt->tm_year < 70) - dt->tm_year += 100; + dt->tm_year = bcd2bin(date[RX8025_REG_YEAR]) + 100; dev_dbg(dev, "%s: date %ds %dm %dh %dmd %dm %dy\n", __func__, dt->tm_sec, dt->tm_min, dt->tm_hour,
@@ -205,11 +202,8 @@ static int rx8025_set_time(struct device *dev, struct rtc_time *dt) struct rx8025_data *rx8025 = dev_get_drvdata(dev); u8 date[7]; - /* - * BUG: The HW assumes every year that is a multiple of 4 to be a leap - * year. Next time this is wrong is 2100, which will not be a leap - * year. - */ + if ((dt->tm_year < 100) || (dt->tm_year > 199)) + return -EINVAL; /* * Here the read-only bits are written as "0". I'm not sure if that
@@ -226,7 +220,7 @@ static int rx8025_set_time(struct device *dev, struct rtc_time *dt) date[RX8025_REG_WDAY] = bin2bcd(dt->tm_wday); date[RX8025_REG_MDAY] = bin2bcd(dt->tm_mday); date[RX8025_REG_MONTH] = bin2bcd(dt->tm_mon + 1); - date[RX8025_REG_YEAR] = bin2bcd(dt->tm_year % 100); + date[RX8025_REG_YEAR] = bin2bcd(dt->tm_year - 100); dev_dbg(dev, "%s: write 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x\n",
--
2.1.4
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