* [PATCH] arm64: dts: imx8mq-evk: VDD_ARM power rail is always ON
@ 2019-10-09 7:04 Anson Huang
2019-10-25 6:04 ` Shawn Guo
0 siblings, 1 reply; 2+ messages in thread
From: Anson Huang @ 2019-10-09 7:04 UTC (permalink / raw)
To: robh+dt, mark.rutland, shawnguo, s.hauer, kernel, festevam,
l.stach, ccaione, daniel.baluta, andrew.smirnov, abel.vesa,
devicetree, linux-arm-kernel, linux-kernel
Cc: Linux-imx
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>
---
arch/arm64/boot/dts/freescale/imx8mq-evk.dts | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
index 6ede46f..4e0a281 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mq-evk.dts
@@ -48,6 +48,8 @@
gpios = <&gpio1 13 GPIO_ACTIVE_HIGH>;
states = <1000000 0x0
900000 0x1>;
+ regulator-boot-on;
+ regulator-always-on;
};
wm8524: audio-codec {
--
2.7.4
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH] arm64: dts: imx8mq-evk: VDD_ARM power rail is always ON
2019-10-09 7:04 [PATCH] arm64: dts: imx8mq-evk: VDD_ARM power rail is always ON Anson Huang
@ 2019-10-25 6:04 ` Shawn Guo
0 siblings, 0 replies; 2+ messages in thread
From: Shawn Guo @ 2019-10-25 6:04 UTC (permalink / raw)
To: Anson Huang
Cc: robh+dt, mark.rutland, s.hauer, kernel, festevam, l.stach,
ccaione, daniel.baluta, andrew.smirnov, abel.vesa, devicetree,
linux-arm-kernel, linux-kernel, Linux-imx
On Wed, Oct 09, 2019 at 03:04:19PM +0800, Anson Huang wrote:
> 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>
Applied, thanks.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2019-10-09 7:04 [PATCH] arm64: dts: imx8mq-evk: VDD_ARM power rail is always ON Anson Huang
2019-10-25 6:04 ` Shawn Guo
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