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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2009-03-25 10:00:08 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-03-25 10:00:08 +0000
commitcf281a99b6e4f1223c8fdce390db3bf79e773f4c (patch)
tree33bff28362b5e41f7a2a09c097e0d2ea6e4ded13 /drivers/rtc
parentfbf2b1f9cfdb4e4b5d042839142ed19ff5d46679 (diff)
parent9d1d4f9eabbca276a2a618a94ed3149d5971063e (diff)
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Merge git://git.marvell.com/orion into devel
Diffstat (limited to 'drivers/rtc')
-rw-r--r--drivers/rtc/rtc-mv.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-mv.c b/drivers/rtc/rtc-mv.c
index 45f12dc..e0263d2 100644
--- a/drivers/rtc/rtc-mv.c
+++ b/drivers/rtc/rtc-mv.c
@@ -12,6 +12,7 @@
#include <linux/bcd.h>
#include <linux/io.h>
#include <linux/platform_device.h>
+#include <linux/delay.h>
#define RTC_TIME_REG_OFFS 0
@@ -119,6 +120,16 @@ static int __init mv_rtc_probe(struct platform_device *pdev)
return -EINVAL;
}
+ /* make sure it is actually functional */
+ if (rtc_time == 0x01000000) {
+ ssleep(1);
+ rtc_time = readl(pdata->ioaddr + RTC_TIME_REG_OFFS);
+ if (rtc_time == 0x01000000) {
+ dev_err(&pdev->dev, "internal RTC not ticking\n");
+ return -ENODEV;
+ }
+ }
+
platform_set_drvdata(pdev, pdata);
pdata->rtc = rtc_device_register(pdev->name, &pdev->dev,
&mv_rtc_ops, THIS_MODULE);