linux-kernel - [PATCH v3] arm64: dts: exynos990: Add clock management unit nodes

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Message-Id: <20241224-cmu-v3-1-33ca24b2413c@mentallysanemainliners.org>
Date: Tue, 24 Dec 2024 04:33:36 +0100
From: Igor Belwon <igor.belwon@...tallysanemainliners.org>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Alim Akhtar <alim.akhtar@...sung.com>
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Igor Belwon <igor.belwon@...tallysanemainliners.org>
Subject: [PATCH v3] arm64: dts: exynos990: Add clock management unit nodes

Add CMU nodes for:
- cmu_top: provides clocks for other blocks
- cmu_hsi0: provides clocks for usb31

Signed-off-by: Igor Belwon <igor.belwon@...tallysanemainliners.org>
---
Hi all,

This patchset adds device tree nodes for Exynos990 CMUs (TOP and HSI0).

CMU_TOP is the top block. It provides clocks for other blocks.
CMU_HSI0 is a block for USB31. It provides clocks for the USB phy and
other USB hardware.

This patchset allows these first two implemented CMU blocks to be used.

Changes since v2:
- REALLY fix the stray blank line (Thanks again, Krzysztof!) [0]
- Rewrite cover letter. (Thanks, Krzysztof!)
- Use b4's single patch format.

[0] I didn't amend the commit. Stupid mistake. Sorry for wasting time
with v2.

Changes since v1:
- Fix clock-names formatting (Thanks, Krzysztof!)
- Remove stray blank line (Thanks, Krzysztof!)
- Make clock-names conform with the binding style

Best regards,
Igor
---
 arch/arm64/boot/dts/exynos/exynos990.dtsi | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/arch/arm64/boot/dts/exynos/exynos990.dtsi b/arch/arm64/boot/dts/exynos/exynos990.dtsi
index 2619f821bc7ca8ed7a49ca817f025819201e0e95..8e8baf2e8ced1b716e447515680a1499c83e3e5d 100644
--- a/arch/arm64/boot/dts/exynos/exynos990.dtsi
+++ b/arch/arm64/boot/dts/exynos/exynos990.dtsi
@@ -5,6 +5,7 @@
  * Copyright (c) 2024, Igor Belwon <igor.belwon@...tallysanemainliners.org>
  */
 
+#include <dt-bindings/clock/samsung,exynos990.h>
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 
 / {
@@ -199,6 +200,23 @@ pinctrl_peric1: pinctrl@...30000 {
 			interrupts = <GIC_SPI 417 IRQ_TYPE_LEVEL_HIGH>;
 		};
 
+		cmu_hsi0: clock-controller@...00000 {
+			compatible = "samsung,exynos990-cmu-hsi0";
+			reg = <0x10a00000 0x8000>;
+			#clock-cells = <1>;
+
+			clocks = <&oscclk>,
+				 <&cmu_top CLK_DOUT_CMU_HSI0_BUS>,
+				 <&cmu_top CLK_DOUT_CMU_HSI0_USB31DRD>,
+				 <&cmu_top CLK_DOUT_CMU_HSI0_USBDP_DEBUG>,
+				 <&cmu_top CLK_DOUT_CMU_HSI0_DPGTC>;
+			clock-names = "oscclk",
+				      "bus",
+				      "usb31drd",
+				      "usbdp_debug",
+				      "dpgtc";
+		};
+
 		pinctrl_hsi1: pinctrl@...40000 {
 			compatible = "samsung,exynos990-pinctrl";
 			reg = <0x13040000 0x1000>;
@@ -245,6 +263,15 @@ pinctrl_cmgp: pinctrl@...30000 {
 			compatible = "samsung,exynos990-pinctrl";
 			reg = <0x15c30000 0x1000>;
 		};
+
+		cmu_top: clock-controller@...30000 {
+			compatible = "samsung,exynos990-cmu-top";
+			reg = <0x1a330000 0x8000>;
+			#clock-cells = <1>;
+
+			clocks = <&oscclk>;
+			clock-names = "oscclk";
+		};
 	};
 
 	timer {

---
base-commit: 8155b4ef3466f0e289e8fcc9e6e62f3f4dceeac2
change-id: 20241224-cmu-4bedee28b8bd

Best regards,
-- 
Igor Belwon <igor.belwon@...tallysanemainliners.org>