OSDN Git Service

arm64: dts: imx8mq-evk: VDD_ARM power rail is always ON
authorAnson Huang <Anson.Huang@nxp.com>
Wed, 9 Oct 2019 07:04:19 +0000 (15:04 +0800)
committerShawn Guo <shawnguo@kernel.org>
Fri, 25 Oct 2019 06:04:31 +0000 (14:04 +0800)
On i.MX8MQ EVK board, VDD_ARM is from a DC-DC converter which
is always ON, the GPIO1_IO13 is ONLY to switch VDD_ARM's voltage
between 0.9V and 1V for CPU DVFS, so VDD_ARM's GPIO regulator
should be always ON to avoid below confusion after kernel boot
up:

imx8mqevk login:
[   31.776619] vdd_arm: disabling

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
arch/arm64/boot/dts/freescale/imx8mq-evk.dts

index 6ede46f..4e0a281 100644 (file)
@@ -48,6 +48,8 @@
                gpios = <&gpio1 13 GPIO_ACTIVE_HIGH>;
                states = <1000000 0x0
                          900000 0x1>;
+               regulator-boot-on;
+               regulator-always-on;
        };
 
        wm8524: audio-codec {