[PATCH v4 2/2] arm64: dts: cix: Add scmi powerdomain nodes for sky1

[Gary Yang <gary.yang@cixtech.com>]

Add a second SCMI channel using SMC transport to communicate with TF-A
for power domain management on the Sky1 SoC.

Signed-off-by: Gary Yang <gary.yang@cixtech.com>
---
 arch/arm64/boot/dts/cix/sky1-power.h | 33 ++++++++++++++++++++++++++++
 arch/arm64/boot/dts/cix/sky1.dtsi    | 21 ++++++++++++++++++
 2 files changed, 54 insertions(+)
 create mode 100644 arch/arm64/boot/dts/cix/sky1-power.h

diff --git a/arch/arm64/boot/dts/cix/sky1-power.h b/arch/arm64/boot/dts/cix/sky1-power.h
new file mode 100644
index 000000000000..53f4a3af36b3
--- /dev/null
+++ b/arch/arm64/boot/dts/cix/sky1-power.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright 2026 Cix Technology Group Co., Ltd.
+ */
+
+#ifndef __SKY1_POWER_H__
+#define __SKY1_POWER_H__
+
+/* The Rich OS need flow the macro */
+#define SKY1_PD_AUDIO		0
+#define SKY1_PD_PCIE_CTRL0	1
+#define SKY1_PD_PCIE_DUMMY	2
+#define SKY1_PD_PCIEHUB		3
+#define SKY1_PD_MMHUB		4
+#define SKY1_PD_MMHUB_SMMU	5
+#define SKY1_PD_DPU0		6
+#define SKY1_PD_DPU1		7
+#define SKY1_PD_DPU2		8
+#define SKY1_PD_DPU3		9
+#define SKY1_PD_DPU4		10
+#define SKY1_PD_VPU_TOP		11
+#define SKY1_PD_VPU_CORE0	12
+#define SKY1_PD_VPU_CORE1	13
+#define SKY1_PD_VPU_CORE2	14
+#define SKY1_PD_VPU_CORE3	15
+#define SKY1_PD_NPU_CORE0	16
+#define SKY1_PD_NPU_CORE1	17
+#define SKY1_PD_NPU_CORE2	18
+#define SKY1_PD_NPU_TOP		19
+#define SKY1_PD_ISP0		20
+#define SKY1_PD_GPU		21
+
+#endif
diff --git a/arch/arm64/boot/dts/cix/sky1.dtsi b/arch/arm64/boot/dts/cix/sky1.dtsi
index 64b76905cbff..495ea91a63f5 100644
--- a/arch/arm64/boot/dts/cix/sky1.dtsi
+++ b/arch/arm64/boot/dts/cix/sky1.dtsi
@@ -6,6 +6,7 @@
 
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 #include <dt-bindings/clock/cix,sky1.h>
+#include "sky1-power.h"
 
 / {
 	interrupt-parent = <&gic>;
@@ -168,6 +169,19 @@ scmi_clk: protocol@14 {
 				#clock-cells = <1>;
 			};
 		};
+
+		ap_to_tfa_scmi: scmi-1 {
+			compatible = "arm,scmi-smc";
+			arm,smc-id = <0xc2000001>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			shmem = <&ap_tfa_scmi_mem>;
+
+			smc_devpd: protocol@11 {
+				reg = <0x11>;
+				#power-domain-cells = <1>;
+			};
+		};
 	};
 
 	pmu-a520 {
@@ -428,6 +442,7 @@ pcie_x8_rc: pcie@a010000 {
 			#size-cells = <2>;
 			bus-range = <0xc0 0xff>;
 			device_type = "pci";
+			power-domains = <&smc_devpd SKY1_PD_PCIE_CTRL0>;
 			#interrupt-cells = <1>;
 			interrupt-map-mask = <0 0 0 0x7>;
 			interrupt-map = <0 0 0 1 &gic 0 0 GIC_SPI 407 IRQ_TYPE_LEVEL_HIGH 0>,
@@ -572,6 +587,12 @@ iomuxc_s5: pinctrl@16007000 {
 			compatible = "cix,sky1-pinctrl-s5";
 			reg = <0x0 0x16007000 0x0 0x1000>;
 		};
+
+		ap_tfa_scmi_mem: shmem@84380000 {
+			compatible = "arm,scmi-shmem";
+			reg = <0x0 0x84380000 0x0 0x80>;
+			reg-io-width = <4>;
+		};
 	};
 
 	timer {
-- 
2.49.0