Messages in this thread Patch in this message | | | Date | Wed, 15 Aug 2007 08:45:22 +0300 | From | Mike Rapoport <> | Subject | [PATCH] RTC v3020 fixes |
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Fix off-by-one in month calculations Add delay for bus accesses to satisfy Tw > 500ns
Signed-off-by: Mike Rapoport <mike@compulab.co.il>
drivers/rtc/rtc-v3020.c | 9 +++++++-- 1 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/rtc/rtc-v3020.c b/drivers/rtc/rtc-v3020.c index 3b58d3d..21b0be5 100644 --- a/drivers/rtc/rtc-v3020.c +++ b/drivers/rtc/rtc-v3020.c @@ -26,6 +26,7 @@ #include <linux/types.h> #include <linux/bcd.h> #include <linux/rtc-v3020.h> +#include <linux/delay.h>
#include <asm/io.h>
@@ -47,6 +48,7 @@ static void v3020_set_reg(struct v3020 *chip, unsigned char address, for (i = 0; i < 4; i++) { writel((tmp & 1) << chip->leftshift, chip->ioaddress); tmp >>= 1; + udelay(1); }
/* Commands dont have data */ @@ -54,6 +56,7 @@ static void v3020_set_reg(struct v3020 *chip, unsigned char address, for (i = 0; i < 8; i++) { writel((data & 1) << chip->leftshift, chip->ioaddress); data >>= 1; + udelay(1); } } } @@ -66,12 +69,14 @@ static unsigned char v3020_get_reg(struct v3020 *chip, unsigned char address) for (i = 0; i < 4; i++) { writel((address & 1) << chip->leftshift, chip->ioaddress); address >>= 1; + udelay(1); }
for (i = 0; i < 8; i++) { data >>= 1; if (readl(chip->ioaddress) & (1 << chip->leftshift)) data |= 0x80; + udelay(1); }
return data; @@ -95,7 +100,7 @@ static int v3020_read_time(struct device *dev, struct rtc_time *dt) tmp = v3020_get_reg(chip, V3020_MONTH_DAY); dt->tm_mday = BCD2BIN(tmp); tmp = v3020_get_reg(chip, V3020_MONTH); - dt->tm_mon = BCD2BIN(tmp); + dt->tm_mon = BCD2BIN(tmp) - 1; tmp = v3020_get_reg(chip, V3020_WEEK_DAY); dt->tm_wday = BCD2BIN(tmp); tmp = v3020_get_reg(chip, V3020_YEAR); @@ -135,7 +140,7 @@ static int v3020_set_time(struct device *dev, struct rtc_time *dt) v3020_set_reg(chip, V3020_MINUTES, BIN2BCD(dt->tm_min)); v3020_set_reg(chip, V3020_HOURS, BIN2BCD(dt->tm_hour)); v3020_set_reg(chip, V3020_MONTH_DAY, BIN2BCD(dt->tm_mday)); - v3020_set_reg(chip, V3020_MONTH, BIN2BCD(dt->tm_mon)); + v3020_set_reg(chip, V3020_MONTH, BIN2BCD(dt->tm_mon) + 1); v3020_set_reg(chip, V3020_WEEK_DAY, BIN2BCD(dt->tm_wday)); v3020_set_reg(chip, V3020_YEAR, BIN2BCD(dt->tm_year % 100));
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