[openwrt/openwrt] mvebu: LS421DE: use the RTC as a wakeup source

[LEDE Commits]

ynezz pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/b8362c20e7a7e83707a39f84689ec4180a4b53fb

commit b8362c20e7a7e83707a39f84689ec4180a4b53fb
Author: Daniel González Cabanelas <dgcbueu at gmail.com>
AuthorDate: Tue Nov 24 16:06:52 2020 +0100

    mvebu: LS421DE: use the RTC as a wakeup source
    
    The Buffalo Linkstation LS421DE comes with a Ricoh RS5C372A real time
    clock. This RTC has the INTRA pin connected to the power management
    circuit, allowing to wake up the device from the power off state when an
    alarm is scheduled.
    
    Add the "wakeup-source" property in the RTC dts node to allow the use
    of the alarm.
    
    Example of use, the device is powered off and it comes to life after 5
    minutes:
    echo $(expr $(date '+%s') + 60 * 5) > /sys/class/rtc/rtc0/wakealarm
    poweroff
    
    This feature isn't available in the stock firmware.
    
    Signed-off-by: Daniel González Cabanelas <dgcbueu at gmail.com>
---
 .../linux/mvebu/files/arch/arm/boot/dts/armada-370-buffalo-ls421de.dts   | 1 +
 1 file changed, 1 insertion(+)

diff --git a/target/linux/mvebu/files/arch/arm/boot/dts/armada-370-buffalo-ls421de.dts b/target/linux/mvebu/files/arch/arm/boot/dts/armada-370-buffalo-ls421de.dts
index 2a76649ec4..dee271541e 100644
--- a/target/linux/mvebu/files/arch/arm/boot/dts/armada-370-buffalo-ls421de.dts
+++ b/target/linux/mvebu/files/arch/arm/boot/dts/armada-370-buffalo-ls421de.dts
@@ -230,6 +230,7 @@
 	rs5c372a: rs5c372a at 32 {
 		compatible = "ricoh,rs5c372a";
 		reg = <0x32>;
+		wakeup-source;
 	};
 };