[PATCH v2 12/13] arm64: dts: imx8mm: add GPC node and power domains

[Lucas Stach <l.stach@xxxxxxxxxxxxxx>]

This adds the DT nodes to describe the power domains available on the
i.MX8MM. Things are a bit more complex compared to other GPCv2 power
domain setups, as there is now a hierarchy of domains where complete
subsystems (HSIO, GPU, DISPLAY) can be gated as a whole, but also
fine granular gating within those subsystems is possible.

Note that this is still incomplete, as both VPU and DISP domains are
missing their reset clocks. Those aren't directly sourced from the CCM,
but have another level of clock gating in the BLKCTL of those domains,
which needs a separate driver.

Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
---
 arch/arm64/boot/dts/freescale/imx8mm.dtsi | 58 +++++++++++++++++++++++
 1 file changed, 58 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm.dtsi b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
index b83f400def8b..c21901a8aea9 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm.dtsi
@@ -4,6 +4,8 @@
  */
 
 #include <dt-bindings/clock/imx8mm-clock.h>
+#include <dt-bindings/power/imx8mm-power.h>
+#include <dt-bindings/reset/imx8mq-reset.h>
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/input/input.h>
 #include <dt-bindings/interrupt-controller/arm-gic.h>
@@ -547,6 +549,62 @@
 				interrupts = <GIC_SPI 89 IRQ_TYPE_LEVEL_HIGH>;
 				#reset-cells = <1>;
 			};
+
+			gpc: gpc@303a0000 {
+				compatible = "fsl,imx8mm-gpc";
+				reg = <0x303a0000 0x10000>;
+				interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>;
+				interrupt-parent = <&gic>;
+				interrupt-controller;
+				#interrupt-cells = <3>;
+
+				pgc {
+					#address-cells = <1>;
+					#size-cells = <0>;
+
+					pgc_hsiomix: power-domain@0 {
+						#power-domain-cells = <0>;
+						reg = <IMX8MM_POWER_DOMAIN_HSIOMIX>;
+						clocks = <&clk IMX8MM_CLK_USB_BUS>;
+					};
+
+					pgc_pcie: power-domain@1 {
+						#power-domain-cells = <0>;
+						reg = <IMX8MM_POWER_DOMAIN_PCIE>;
+						power-domains = <&pgc_hsiomix>;
+					};
+
+					pgc_otg1: power-domain@2 {
+						#power-domain-cells = <0>;
+						reg = <IMX8MM_POWER_DOMAIN_OTG1>;
+						power-domains = <&pgc_hsiomix>;
+					};
+
+					pgc_otg2: power-domain@3 {
+						#power-domain-cells = <0>;
+						reg = <IMX8MM_POWER_DOMAIN_OTG2>;
+						power-domains = <&pgc_hsiomix>;
+					};
+
+					pgc_gpumix: power-domain@4 {
+						#power-domain-cells = <0>;
+						reg = <IMX8MM_POWER_DOMAIN_GPUMIX>;
+						clocks = <&clk IMX8MM_CLK_GPU_BUS_ROOT>,
+						         <&clk IMX8MM_CLK_GPU_AHB>;
+					};
+
+					pgc_gpu: power-domain@5 {
+						#power-domain-cells = <0>;
+						reg = <IMX8MM_POWER_DOMAIN_GPU>;
+						clocks = <&clk IMX8MM_CLK_GPU_AHB>,
+						         <&clk IMX8MM_CLK_GPU_BUS_ROOT>,
+						         <&clk IMX8MM_CLK_GPU2D_ROOT>,
+						         <&clk IMX8MM_CLK_GPU3D_ROOT>;
+						resets = <&src IMX8MQ_RESET_GPU_RESET>;
+						power-domains = <&pgc_gpumix>;
+					};
+				};
+			};
 		};
 
 		aips2: bus@30400000 {
-- 
2.20.1