From d0ed3f5488ad403ca8cb6b42787b57a35b760327 Mon Sep 17 00:00:00 2001 From: "Maciej S. Szmigiero" Date: Mon, 27 Nov 2017 23:22:28 +0100 Subject: [PATCH] ARM: dts: imx6qdl-udoo: add support for powering off UDOO board has a possibility to disable most of imx6 SoC power supplies via "EN_5V" signal, which is connected to "NANDF_D4" pad. This reduces current consumption after shutdown from ~350 mA to ~40 mA and prevents a SoC watchdog from starting it again on its own after the watchdog timeout expires (previously it was not possible to shut down the SoC permanently if its watchdog was ever enabled since it was still ticking after the shutdown). Unfortunately, this does not extinguish the "Power" LED (as it is powered from an always-on voltage regulator). To power the SoC up again press the power button (SW2, the one with a long shaft). Signed-off-by: Maciej S. Szmigiero Signed-off-by: Shawn Guo --- arch/arm/boot/dts/imx6qdl-udoo.dtsi | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/arm/boot/dts/imx6qdl-udoo.dtsi b/arch/arm/boot/dts/imx6qdl-udoo.dtsi index 839282c557015..4161b7d4323a3 100644 --- a/arch/arm/boot/dts/imx6qdl-udoo.dtsi +++ b/arch/arm/boot/dts/imx6qdl-udoo.dtsi @@ -28,6 +28,13 @@ status = "disabled"; }; + gpio-poweroff { + compatible = "gpio-poweroff"; + gpios = <&gpio2 4 0>; + pinctrl-0 = <&pinctrl_power_off>; + pinctrl-names = "default"; + }; + memory { reg = <0x10000000 0x40000000>; }; @@ -172,6 +179,12 @@ >; }; + pinctrl_power_off: poweroffgrp { + fsl,pins = < + MX6QDL_PAD_NANDF_D4__GPIO2_IO04 0x30 + >; + }; + pinctrl_touchscreenp7: touchscreenp7grp { fsl,pins = < MX6QDL_PAD_SD2_DAT0__GPIO1_IO15 0x70 -- 2.30.2