Commit 32672c55 authored by Alexandre Belloni's avatar Alexandre Belloni
Browse files

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: default avatarAlexandre Belloni <alexandre.belloni@free-electrons.com>
parent 2ddd1869

drivers/rtc/rtc-rx8025.c

+4 −10
Original line number Diff line number Diff line
@@ -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",