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authorAlexandre Belloni <alexandre.belloni@free-electrons.com>2015-07-25 12:07:37 +0200
committerAlexandre Belloni <alexandre.belloni@free-electrons.com>2015-09-05 13:19:11 +0200
commit32672c55951b2633bb93ec6f12734cf17e9d3a14 (patch)
treecac8727ddf1c6eeabf870616dc93589c825371d3 /drivers/rtc/rtc-rx8025.c
parentrtc: rx8025: use BIT() (diff)
downloadlinux-32672c55951b2633bb93ec6f12734cf17e9d3a14.tar.xz
linux-32672c55951b2633bb93ec6f12734cf17e9d3a14.zip
rtc: rx8025: only handle dates between 2000 and 2099
The hardware is only capable of handling dates between 2000 and 2099, enforce that. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Diffstat (limited to 'drivers/rtc/rtc-rx8025.c')
-rw-r--r--drivers/rtc/rtc-rx8025.c14
1 files 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",