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