[PATCH 1/5] arm64: dts: imx8mq-phanbell: Keep the GPU rail on

[Rudi Heitbaum]

BUCK3 feeds the GPU rail, and unlike every other regulator on this board
it is marked neither regulator-always-on nor referenced by any consumer.
Once a driver for the BD71837 is present the regulator core finds it
unused and switches it off when it completes initialisation:

  buck3: disabling

which takes the board out about thirty seconds into the boot.

Mark it always-on, matching the other seven bucks and all seven LDOs.

Handing it to the GPU power domain instead, the way imx8mq-librem5.dtsi
does, describes the hardware better but does not work here. With that
link removed the same image boots reliably. 

Signed-off-by: Rudi Heitbaum <rudi@xxxxxxxxxxxx>
---
 arch/arm64/boot/dts/freescale/imx8mq-phanbell.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mq-phanbell.dts b/arch/arm64/boot/dts/freescale/imx8mq-phanbell.dts
index e34045d10a12..c06a787a4013 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq-phanbell.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mq-phanbell.dts
@@ -156,6 +156,7 @@ buck3: BUCK3 {
 				regulator-min-microvolt = <700000>;
 				regulator-max-microvolt = <1300000>;
 				regulator-boot-on;
+				regulator-always-on;
 				rohm,dvs-run-voltage = <900000>;
 			};
 
-- 
2.53.0