linux-kernel - [PATCH v2 5/5] arm64: dts: exynos: gs101: add cmu_dpu and sysreg

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Message-Id: <20260112-dpu-clocks-v2-5-bd00903fdeb9@linaro.org>
Date: Mon, 12 Jan 2026 14:16:52 +0000
From: Peter Griffin <peter.griffin@...aro.org>
To: André Draszik <andre.draszik@...aro.org>, 
 Tudor Ambarus <tudor.ambarus@...aro.org>, 
 Michael Turquette <mturquette@...libre.com>, 
 Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Alim Akhtar <alim.akhtar@...sung.com>, 
 Sylwester Nawrocki <s.nawrocki@...sung.com>, 
 Chanwoo Choi <cw00.choi@...sung.com>
Cc: linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org, 
 linux-clk@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Krzysztof Kozlowski <krzk@...nel.org>, 
 kernel-team@...roid.com, Will McVicker <willmcvicker@...gle.com>, 
 Juan Yescas <jyescas@...gle.com>, Doug Anderson <dianders@...gle.com>, 
 Peter Griffin <peter.griffin@...aro.org>
Subject: [PATCH v2 5/5] arm64: dts: exynos: gs101: add cmu_dpu and
 sysreg_dpu dt nodes

Enable the cmu_dpu clock management unit. It feeds some of the display
IPs. Additionally add the sysreg_dpu node which contains the
BUSCOMPONENT_DRCG_EN and MEMCLK registers required by cmu_dpu to enable
dynamic root clock gating of bus components.

Signed-off-by: Peter Griffin <peter.griffin@...aro.org>
---
 arch/arm64/boot/dts/exynos/google/gs101.dtsi | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/arch/arm64/boot/dts/exynos/google/gs101.dtsi b/arch/arm64/boot/dts/exynos/google/gs101.dtsi
index 48f3819590cf8c05d6bd7241cfed8720149c7db4..d085f9fb0f62ac2f57b104c20880e64d885d0bee 100644
--- a/arch/arm64/boot/dts/exynos/google/gs101.dtsi
+++ b/arch/arm64/boot/dts/exynos/google/gs101.dtsi
@@ -1815,6 +1815,23 @@ pinctrl_gsacore: pinctrl@...80000 {
 			status = "disabled";
 		};
 
+		cmu_dpu: clock-controller@...00000 {
+			compatible = "google,gs101-cmu-dpu";
+			reg = <0x1c000000 0x10000>;
+			#clock-cells = <1>;
+
+			clocks = <&ext_24_5m>,
+				 <&cmu_top CLK_DOUT_CMU_DPU_BUS>;
+			clock-names = "oscclk", "bus";
+			samsung,sysreg = <&sysreg_dpu>;
+		};
+
+		sysreg_dpu: syscon@...20000 {
+			compatible = "google,gs101-dpu-sysreg", "syscon";
+			reg = <0x1c020000 0x10000>;
+			clocks = <&cmu_dpu CLK_GOUT_DPU_SYSREG_DPU_PCLK>;
+		};
+
 		cmu_top: clock-controller@...80000 {
 			compatible = "google,gs101-cmu-top";
 			reg = <0x1e080000 0x10000>;

-- 
2.52.0.457.g6b5491de43-goog