linux-kernel - [PATCH v2 1/3] ARM: dts: samsung: exynos4x12: replace duplicate pmu node with phandle

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Date:   Sat, 22 Jul 2023 14:17:17 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH v2 1/3] ARM: dts: samsung: exynos4x12: replace duplicate pmu node with phandle

Devicetree for the FIMC IS camera included duplicated PMU node as its
child.  This is not a correct representation of the hardware.  Mapping
the PMU (Power Management Unit) IO memory should be via syscon-like
phandle (samsung,pmu-syscon, already used for other drivers), not by
duplicating "pmu" Devicetree node inside the FIMC IS.

The change is not compatible with older Linux kernel, which does not
parse samsung,pmu-syscon property.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

---

Changes in v2:
1. None

Depends on:
https://lore.kernel.org/linux-devicetree/20230722115441.139628-1-krzysztof.kozlowski@linaro.org/T/#t
---
 arch/arm/boot/dts/samsung/exynos4x12.dtsi | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/arch/arm/boot/dts/samsung/exynos4x12.dtsi b/arch/arm/boot/dts/samsung/exynos4x12.dtsi
index 84c1db221c98..4524c1e6bb2f 100644
--- a/arch/arm/boot/dts/samsung/exynos4x12.dtsi
+++ b/arch/arm/boot/dts/samsung/exynos4x12.dtsi
@@ -516,15 +516,12 @@ fimc_is: fimc-is@...00000 {
 		iommus = <&sysmmu_fimc_isp>, <&sysmmu_fimc_drc>,
 			 <&sysmmu_fimc_fd>, <&sysmmu_fimc_mcuctl>;
 		iommu-names = "isp", "drc", "fd", "mcuctl";
+		samsung,pmu-syscon = <&pmu_system_controller>;
 		#address-cells = <1>;
 		#size-cells = <1>;
 		ranges;
 		status = "disabled";
 
-		pmu@...20000 {
-			reg = <0x10020000 0x3000>;
-		};
-
 		i2c1_isp: i2c-isp@...40000 {
 			compatible = "samsung,exynos4212-i2c-isp";
 			reg = <0x12140000 0x100>;
-- 
2.34.1