[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>
diff --git a/drivers/rtc/rtc-rs5c348.c b/drivers/rtc/rtc-rs5c348.c
index 0964d1d..2558906 100644
--- a/drivers/rtc/rtc-rs5c348.c
+++ b/drivers/rtc/rtc-rs5c348.c
@@ -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 @@
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);