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Date: Wed, 15 Aug 2007 17:02:37 +0300
From: Mike Rapoport <mike@...pulab.co.il>
To: Raphaël Assénat <raph@...com>
CC: LKML <linux-kernel@...r.kernel.org>,
Alessandro Zummo <a.zummo@...ertech.it>
Subject: Re: [PATCH] RTC v3020 fixes
Raphaël Assénat wrote:
> Mike Rapoport wrote:
>> Fix off-by-one in month calculations
>> Add delay for bus accesses to satisfy Tw > 500ns
>>
> *snip*
>> @@ -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);
>
> This should be BIN2BCD(dt->tm_mon + 1)) instead. Otherwise, in october
> (month 9), the final value will be 0xa instead of 0x10.
Fixed.
> Other than that, the patch looks fine to me. You can add
> Acked-by: Raphael Assenat <raph@...com> to the updated patch.
>
> Please add Alessandro Zummo <a.zummo@...ertech.it> in the CC list to
> make sure he sees it.
>
> Best regards,
> Raphaël Assénat
Signed-off-by: Mike Rapoport <mike@...pulab.co.il>
Acked-by: Raphael Assenat <raph@...com>
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..e96d667 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));
--
Sincerely yours,
Mike.
-
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