From 01272f05aae5f6aca4337eb52e6b9290ce12e9f7 Mon Sep 17 00:00:00 2001 From: Peter Griffin Date: Mon, 22 Dec 2025 10:22:13 +0000 Subject: [PATCH] arm64: dts: exynos: gs101: add samsung,sysreg property to CMU nodes With the exception of cmu_top, each CMU has a corresponding sysreg bank that contains the BUSCOMPONENT_DRCG_EN and optional MEMCLK registers. The BUSCOMPONENT_DRCG_EN register enables dynamic root clock gating of bus components and MEMCLK gates the sram clock. Now the clock driver supports automatic clock mode, provide the samsung,sysreg property so the driver can enable dynamic root clock gating of bus components and gate sram clock. Note without the property specified the driver simply falls back to previous behaviour of not configuring these registers so it is not an ABI break. Signed-off-by: Peter Griffin Link: https://patch.msgid.link/20251222-automatic-clocks-v7-2-fec86fa89874@linaro.org Signed-off-by: Krzysztof Kozlowski --- arch/arm64/boot/dts/exynos/google/gs101.dtsi | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm64/boot/dts/exynos/google/gs101.dtsi b/arch/arm64/boot/dts/exynos/google/gs101.dtsi index 9b38c2248016a..2e25eeb0c2590 100644 --- a/arch/arm64/boot/dts/exynos/google/gs101.dtsi +++ b/arch/arm64/boot/dts/exynos/google/gs101.dtsi @@ -578,6 +578,7 @@ clocks = <&cmu_top CLK_DOUT_CMU_MISC_BUS>, <&cmu_top CLK_DOUT_CMU_MISC_SSS>; clock-names = "bus", "sss"; + samsung,sysreg = <&sysreg_misc>; }; sysreg_misc: syscon@10030000 { @@ -671,6 +672,7 @@ <&cmu_top CLK_DOUT_CMU_PERIC0_BUS>, <&cmu_top CLK_DOUT_CMU_PERIC0_IP>; clock-names = "oscclk", "bus", "ip"; + samsung,sysreg = <&sysreg_peric0>; }; sysreg_peric0: syscon@10820000 { @@ -1217,6 +1219,7 @@ <&cmu_top CLK_DOUT_CMU_PERIC1_BUS>, <&cmu_top CLK_DOUT_CMU_PERIC1_IP>; clock-names = "oscclk", "bus", "ip"; + samsung,sysreg = <&sysreg_peric1>; }; sysreg_peric1: syscon@10c20000 { @@ -1575,6 +1578,7 @@ <&cmu_top CLK_DOUT_CMU_HSI0_USBDPDBG>; clock-names = "oscclk", "bus", "dpgtc", "usb31drd", "usbdpdbg"; + samsung,sysreg = <&sysreg_hsi0>; }; sysreg_hsi0: syscon@11020000 { @@ -1646,6 +1650,7 @@ <&cmu_top CLK_DOUT_CMU_HSI2_UFS_EMBD>, <&cmu_top CLK_DOUT_CMU_HSI2_MMC_CARD>; clock-names = "oscclk", "bus", "pcie", "ufs", "mmc"; + samsung,sysreg = <&sysreg_hsi2>; }; sysreg_hsi2: syscon@14420000 { @@ -1706,6 +1711,7 @@ clocks = <&ext_24_5m>; clock-names = "oscclk"; + samsung,sysreg = <&sysreg_apm>; }; sysreg_apm: syscon@17420000 { -- 2.47.3