linux-kernel - [PATCH 4/4] arm64: dts: exynos: gs101: specify placeholder clocks for remaining pinctrl

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Message-Id: <20240429-samsung-pinctrl-busclock-dts-v1-4-5e935179f3ca@linaro.org>
Date: Mon, 29 Apr 2024 21:04:41 +0100
From: André Draszik <andre.draszik@...aro.org>
To: Peter Griffin <peter.griffin@...aro.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>, Alim Akhtar <alim.akhtar@...sung.com>
Cc: Tudor Ambarus <tudor.ambarus@...aro.org>, 
 Will McVicker <willmcvicker@...gle.com>, 
 Sam Protsenko <semen.protsenko@...aro.org>, kernel-team@...roid.com, 
 linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 André Draszik <andre.draszik@...aro.org>
Subject: [PATCH 4/4] arm64: dts: exynos: gs101: specify placeholder clocks
 for remaining pinctrl

The pinctrl instances hsi1, gsactrl, and gsacore need a clock for
register access to work.

Since we haven't implemented the relevant CMUs for the clocks required
by these instances just add placeholder clocks for now so as to make the
DT pass the validation checks.
Once the clocks are implmented in the gs101 clock driver, these should
be updated then.

Signed-off-by: André Draszik <andre.draszik@...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 f8fcbbb06e7b..6db2c9bbb371 100644
--- a/arch/arm64/boot/dts/exynos/google/gs101.dtsi
+++ b/arch/arm64/boot/dts/exynos/google/gs101.dtsi
@@ -180,6 +180,14 @@ HERA_CPU_SLEEP: cpu-hera-sleep {
 		};
 	};
 
+	/* TODO: Remove this once all pinctrl clocks are implemented  */
+	clk_placeholder: clock-placeholder {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <0>;
+		clock-output-names = "placeholder_clk";
+	};
+
 	/* ect node is required to be present by bootloader */
 	ect {
 	};
@@ -1309,6 +1317,9 @@ usbdrd31_dwc3: usb@0 {
 		pinctrl_hsi1: pinctrl@...40000 {
 			compatible = "google,gs101-pinctrl";
 			reg = <0x11840000 0x00001000>;
+			/* TODO: update once support for this CMU exists */
+			clocks = <&clk_placeholder>;
+			clock-names = "pclk";
 			interrupts = <GIC_SPI 471 IRQ_TYPE_LEVEL_HIGH 0>;
 		};
 
@@ -1380,11 +1391,17 @@ wakeup-interrupt-controller {
 		pinctrl_gsactrl: pinctrl@...40000 {
 			compatible = "google,gs101-pinctrl";
 			reg = <0x17940000 0x00001000>;
+			/* TODO: update once support for this CMU exists */
+			clocks = <&clk_placeholder>;
+			clock-names = "pclk";
 		};
 
 		pinctrl_gsacore: pinctrl@...80000 {
 			compatible = "google,gs101-pinctrl";
 			reg = <0x17a80000 0x00001000>;
+			/* TODO: update once support for this CMU exists */
+			clocks = <&clk_placeholder>;
+			clock-names = "pclk";
 		};
 
 		cmu_top: clock-controller@...80000 {

-- 
2.44.0.769.g3c40516874-goog