davinci: da8xx/omap-l1: mark RTC as a wakeup source

On da850, RTC alarm is a wakeup source from deep sleep.
Mark it as a wakeup source after the rtc platform device
is registered.

Without this patch, the rtc-omap driver suspends the RTC
during the suspend sequence and hence it cannot wakeup the
SoC.

Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/arch/arm/mach-davinci/devices-da8xx.c b/arch/arm/mach-davinci/devices-da8xx.c
index dd2d32c4ce86..a5105f03fd86 100644
--- a/arch/arm/mach-davinci/devices-da8xx.c
+++ b/arch/arm/mach-davinci/devices-da8xx.c
@@ -481,11 +481,18 @@ static struct platform_device da8xx_rtc_device = {
 
 int da8xx_register_rtc(void)
 {
+        int ret;
+
         /* Unlock the rtc's registers */
         __raw_writel(0x83e70b13, IO_ADDRESS(DA8XX_RTC_BASE + 0x6c));
         __raw_writel(0x95a4f1e0, IO_ADDRESS(DA8XX_RTC_BASE + 0x70));
 
-        return platform_device_register(&da8xx_rtc_device);
+        ret = platform_device_register(&da8xx_rtc_device);
+        if (!ret)
+                /* Atleast on DA850, RTC is a wakeup source */
+                device_init_wakeup(&da8xx_rtc_device.dev, true);
+
+        return ret;
 }
 
 static struct resource da8xx_cpuidle_resources[] = {