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rtc-jz4740: reset rtc clock if it has lost its state

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SVN-Revision: 19437
This commit is contained in:
Lars-Peter Clausen 2010-01-31 12:09:52 +00:00
parent f12ce1ef3e
commit 565a84faba
1 changed files with 9 additions and 2 deletions
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11
target/linux/xburst/files-2.6.32/drivers/rtc/rtc-jz4740.c
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@ -22,7 +22,8 @@
#define JZ_REG_RTC_CTRL 0x00
#define JZ_REG_RTC_SEC 0x04
#define JZ_REG_RTC_SEC_ALARM 0x08
#define JZ_REG_REGULATOR 0x0C
#define JZ_REG_RTC_REGULATOR 0x0C
#define JZ_REG_RTC_SCRATCHPAD 0x34
#define JZ_RTC_CTRL_WRDY BIT(7)
#define JZ_RTC_CTRL_1HZ BIT(6)
@ -211,6 +212,7 @@ static int __devinit jz4740_rtc_probe(struct platform_device *pdev)
{
int ret;
struct jz4740_rtc *rtc;
uint32_t scratchpad;
rtc = kmalloc(sizeof(*rtc), GFP_KERNEL);
@ -264,7 +266,12 @@ static int __devinit jz4740_rtc_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "Failed to request rtc irq: %d\n", ret);
goto err_unregister_rtc;
}
printk("rtc-ctrl: %d\n", jz4740_rtc_reg_read(rtc, JZ_REG_RTC_CTRL));
scratchpad = jz4740_rtc_reg_read(rtc, JZ_REG_RTC_SCRATCHPAD);
if (scratchpad != 0x12345678) {
jz4740_rtc_reg_write(rtc, JZ_REG_RTC_SCRATCHPAD, 0x12345678);
jz4740_rtc_reg_write(rtc, JZ_REG_RTC_SEC, 0);
}
return 0;