From b8362c20e7a7e83707a39f84689ec4180a4b53fb Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gonz=C3=A1lez=20Cabanelas?= Date: Tue, 24 Nov 2020 16:06:52 +0100 Subject: mvebu: LS421DE: use the RTC as a wakeup source MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 --- .../linux/mvebu/files/arch/arm/boot/dts/armada-370-buffalo-ls421de.dts | 1 + 1 file changed, 1 insertion(+) (limited to 'target/linux/mvebu/files/arch/arm/boot/dts') 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@32 { compatible = "ricoh,rs5c372a"; reg = <0x32>; + wakeup-source; }; }; -- cgit v1.2.3