linux-kernel - [PATCH 5.12 276/292] arm64: dts: rockchip: Re-add regulator-boot-on, regulator-always-on for vdd

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Date:   Mon, 19 Jul 2021 16:55:38 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Alex Bee <knaerzche@...il.com>,
        Heiko Stuebner <heiko@...ech.de>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.12 276/292] arm64: dts: rockchip: Re-add regulator-boot-on, regulator-always-on for vdd_gpu on rk3399-roc-pc

From: Alex Bee <knaerzche@...il.com>

[ Upstream commit 06b2818678d9b35102c9816ffaf6893caf306ed0 ]

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>
Link: https://lore.kernel.org/r/20210619121446.7802-1-knaerzche@gmail.com
Signed-off-by: Heiko Stuebner <heiko@...ech.de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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 20309076dbac..e4345e5bdfb6 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi
@@ -488,6 +488,8 @@
 		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 {
-- 
2.30.2