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Commit 13c73f04 authored by Atsushi Nemoto's avatar Atsushi Nemoto Committed by Linus Torvalds
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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: default avatarAtsushi Nemoto <anemo@mba.ocn.ne.jp>
Acked-by: default avatarAlessandro Zummo <a.zummo@towertech.it>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent b9dd6ffc

drivers/rtc/rtc-rs5c348.c

+8 −1
Original line number Diff line number Diff line
@@ -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);