linux-kernel - [PATCH v3 6/8] riscv: dts: thead: Add GPU power sequencer node

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Message-Id: <20250530-apr_14_for_sending-v3-6-83d5744d997c@samsung.com>
Date: Fri, 30 May 2025 00:23:53 +0200
From: Michal Wilczynski <m.wilczynski@...sung.com>
To: Drew Fustini <drew@...7.com>, Guo Ren <guoren@...nel.org>,  Fu Wei
	<wefu@...hat.com>, Rob Herring <robh@...nel.org>,  Krzysztof Kozlowski
	<krzk+dt@...nel.org>,  Conor Dooley <conor+dt@...nel.org>,  Michal
	Wilczynski <m.wilczynski@...sung.com>,  Bartosz Golaszewski <brgl@...ev.pl>,
	Philipp Zabel <p.zabel@...gutronix.de>,  Frank Binns
	<frank.binns@...tec.com>, Matt Coster <matt.coster@...tec.com>,  Maarten
	Lankhorst <maarten.lankhorst@...ux.intel.com>,  Maxime Ripard
	<mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,  David Airlie
	<airlied@...il.com>, Simona Vetter <simona@...ll.ch>,  Paul Walmsley
	<paul.walmsley@...ive.com>,  Palmer Dabbelt <palmer@...belt.com>, Albert Ou
	<aou@...s.berkeley.edu>,  Alexandre Ghiti <alex@...ti.fr>, Ulf Hansson
	<ulf.hansson@...aro.org>,  Marek Szyprowski <m.szyprowski@...sung.com>
Cc: linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org, 
	dri-devel@...ts.freedesktop.org
Subject: [PATCH v3 6/8] riscv: dts: thead: Add GPU power sequencer node

Add the device tree node for the T-HEAD TH1520 GPU power sequencer
(gpu_pwrseq) to the th1520.dtsi file.

This node instantiates the thead,th1520-gpu-pwrseq driver, which
is responsible for managing the GPU's power-on/off sequence. The node
specifies the gpu-clkgen reset, which is one of the resources
controlled by this sequencer.

Signed-off-by: Michal Wilczynski <m.wilczynski@...sung.com>
---
 arch/riscv/boot/dts/thead/th1520.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/riscv/boot/dts/thead/th1520.dtsi b/arch/riscv/boot/dts/thead/th1520.dtsi
index bdbb1b985b0b76cf669a9bf40c6ec37258329056..6170eec79e919b606a2046ac8f52db07e47ef441 100644
--- a/arch/riscv/boot/dts/thead/th1520.dtsi
+++ b/arch/riscv/boot/dts/thead/th1520.dtsi
@@ -238,6 +238,12 @@ aon: aon {
 		#power-domain-cells = <1>;
 	};
 
+	gpu_pwrseq: pwrseq {
+		compatible = "thead,th1520-gpu-pwrseq";
+		resets = <&rst TH1520_RESET_ID_GPU_CLKGEN>;
+		reset-names = "gpu-clkgen";
+	};
+
 	soc {
 		compatible = "simple-bus";
 		interrupt-parent = <&plic>;

-- 
2.34.1