static int __init tegra_rtc_probe(struct platform_device *pdev)
{
struct rtc_device *rtc;
NvU32 initial;
if (NvOdmPmuDeviceOpen(&hPmu) == NV_FALSE) {
pr_debug("%s: NvOdmPmuDeviceOpen failed\n", pdev->name);
return -ENXIO;
}
/* if the SoCs PMU has't been properly initialized, a bogus large
* value may be returned which triggers the Y2038 bug in the kernel.
* work-around this issue by checking the initial value of the PMU
* and then clobbering it if the value is bogus */
if (NvOdmPmuReadRtc(hPmu, &initial) && ((time_t)initial < 0))
{
if(!NvOdmPmuWriteRtc(hPmu, 0))
return -EINVAL;
}
rtc = rtc_device_register(pdev->name, &pdev->dev,
&tegra_rtc_ops, THIS_MODULE);
if (IS_ERR(rtc)) {
pr_debug("%s: can't register RTC device, err %ld\n",
pdev->name, PTR_ERR(rtc));
NvOdmPmuDeviceClose(hPmu);
return -1;
}
platform_set_drvdata(pdev, rtc);
return 0;
}
NvBool
NvRmPmuWriteRtc(
NvRmDeviceHandle hRmDevice,
NvU32 Count)
{
NvBool ReturnStatus = NV_FALSE;
if (!s_PmuSupportedEnv)
return NV_FALSE;
NV_ASSERT(s_Pmu.hMutex);
NvOsMutexLock(s_Pmu.hMutex);
ReturnStatus = NvOdmPmuWriteRtc(s_Pmu.hOdmPmu, Count);
NvOsMutexUnlock(s_Pmu.hMutex);
return ReturnStatus;
}
static int tegra_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
unsigned long now;
int ret;
if (hPmu == NULL)
return -1;
ret = rtc_tm_to_time(tm, &now);
if (ret != 0)
return -1;
if (!NvOdmPmuWriteRtc(hPmu, (NvU32)now)) {
printk("NvOdmPmuWriteRtc failed\n");
return -1;
}
return 0;
}
static int tegra_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
unsigned long now;
int ret;
if (hPmu == NULL)
return -1;
ret = rtc_tm_to_time(tm, &now);
if (ret != 0)
return -1;
if (!NvOdmPmuWriteRtc(hPmu, (NvU32)now)) {
printk("NvOdmPmuWriteRtc failed\n");
return -1;
}
#if SYNC_EXTERNAL_RTC_TO_INTERNAL_RTC
return internal_tegra_rtc_set_time(tm);
#else
return 0;
#endif
}
