[PATCH v6 2/4] arm64: dts: exynos: gs101: add samsung,sysreg property to CMU nodes
From: Peter Griffin <peter.griffin@linaro.org>
Date: 2025-12-20 09:05:56
Also in:
linux-clk, linux-devicetree, linux-samsung-soc, lkml
Subsystem:
arm/samsung s3c, s5p and exynos arm architectures, google tensor soc support, the rest · Maintainers:
Krzysztof Kozlowski, Peter Griffin, Linus Torvalds
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 <peter.griffin@linaro.org> --- Changes in v4: - Update commit message (Peter) --- 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 9b38c2248016aa65293c0abf9ccaf20857d89693..2e25eeb0c2590b99ef98c7bdac3caa0c34161706 100644
--- a/arch/arm64/boot/dts/exynos/google/gs101.dtsi
+++ b/arch/arm64/boot/dts/exynos/google/gs101.dtsi@@ -578,6 +578,7 @@ cmu_misc: clock-controller@10010000 { 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_peric0: clock-controller@10800000 { <&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_peric1: clock-controller@10c00000 { <&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_hsi0: clock-controller@11000000 { <&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_hsi2: clock-controller@14400000 { <&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 @@ cmu_apm: clock-controller@17400000 { clocks = <&ext_24_5m>; clock-names = "oscclk"; + samsung,sysreg = <&sysreg_apm>; }; sysreg_apm: syscon@17420000 {
--
2.52.0.351.gbe84eed79e-goog