linux-kernel - [PATCH] arm64: dts: rockchip: Re-add regulator-boot-on, regulator-always-on for vdd

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Message-Id: <20210619121446.7802-1-knaerzche@gmail.com>
Date:   Sat, 19 Jun 2021 14:14:46 +0200
From:   Alex Bee <knaerzche@...il.com>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Markus Reichl <m.reichl@...etechno.de>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Alex Bee <knaerzche@...il.com>
Subject: [PATCH] arm64: dts: rockchip: Re-add regulator-boot-on, regulator-always-on for vdd_gpu on rk3399-roc-pc

This might be a limitation of either the current panfrost driver
devfreq implementation or how the gpu is implemented in RK3399 SoC.
The gpu regulator must never get disabled or the registers get
(randomly?) inaccessable by the driver. (see all other RK3399 boards)

Fixes: ec7d731d81e7 ("arm64: dts: rockchip: Add node for gpu on rk3399-roc-pc")
Signed-off-by: Alex Bee <knaerzche@...il.com>
---
 arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi
index da3021dc0ff3..8b27ee4be755 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi
@@ -494,6 +494,8 @@ vdd_gpu: regulator@41 {
 		regulator-min-microvolt = <712500>;
 		regulator-max-microvolt = <1500000>;
 		regulator-ramp-delay = <1000>;
+		regulator-always-on;
+		regulator-boot-on;
 		vin-supply = <&vcc3v3_sys>;
 
 		regulator-state-mem {
-- 
2.27.0