diff options
| author | Dave Airlie <airlied@redhat.com> | 2009-03-28 20:22:18 -0400 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2009-03-28 20:22:18 -0400 |
| commit | 90f959bcb386da2c71613dcefc6a285e054a539e (patch) | |
| tree | ee3e9dd4111d4aad12e579cb0c2c159114dff263 /drivers/rtc/rtc-mv.c | |
| parent | 41f13fe81dd1b08723ab9f3fc3c7f29cfa81f1a5 (diff) | |
| parent | 07d43ba98621f08e252a48c96b258b4d572b0257 (diff) | |
drm: merge Linux master into HEAD
Conflicts:
drivers/gpu/drm/drm_info.c
drivers/gpu/drm/drm_proc.c
drivers/gpu/drm/i915/i915_gem_debugfs.c
Diffstat (limited to 'drivers/rtc/rtc-mv.c')
| -rw-r--r-- | drivers/rtc/rtc-mv.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-mv.c b/drivers/rtc/rtc-mv.c index 45f12dcd371..e0263d2005e 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); |