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[PATCH] RTC: more XSTP/VDET support for rtc-rs5c348 driver 

If the chip detected "oscillator stop" condition, show an warning message.
And initialize it with the Epoch time instead of leaving it with unknown
date/time.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Atsushi Nemoto 2006-09-29 02:01:37 -07:00 committed by Linus Torvalds
parent b9dd6ffc3d
commit 13c73f045f
1 changed files with 8 additions and 1 deletions
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9
drivers/rtc/rtc-rs5c348.c
View File

@ -23,7 +23,7 @@
#include <linux/workqueue.h>
#include <linux/spi/spi.h>
#define DRV_VERSION "0.1"
#define DRV_VERSION "0.2"
#define RS5C348_REG_SECS 0
#define RS5C348_REG_MINS 1
@ -175,8 +175,15 @@ static int __devinit rs5c348_probe(struct spi_device *spi)
goto kfree_exit;
if (ret & (RS5C348_BIT_XSTP | RS5C348_BIT_VDET)) {
u8 buf[2];
struct rtc_time tm;
if (ret & RS5C348_BIT_VDET)
dev_warn(&spi->dev, "voltage-low detected.\n");
if (ret & RS5C348_BIT_XSTP)
dev_warn(&spi->dev, "oscillator-stop detected.\n");
rtc_time_to_tm(0, &tm); /* 1970/1/1 */
ret = rs5c348_rtc_set_time(&spi->dev, &tm);
if (ret < 0)
goto kfree_exit;
buf[0] = RS5C348_CMD_W(RS5C348_REG_CTL2);
buf[1] = 0;
ret = spi_write_then_read(spi, buf, sizeof(buf), NULL, 0);