linux-kernel - Re: [PATCH 4/7] arm64: dts: imx8mn: add GPC node

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Date:   Wed, 06 Oct 2021 09:48:33 +0200
From:   Lucas Stach <l.stach@...gutronix.de>
To:     Adam Ford <aford173@...il.com>,
        linux-arm-kernel@...ts.infradead.org
Cc:     aford@...conembedded.com, Rob Herring <robh+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/7] arm64: dts: imx8mn: add GPC node

Am Dienstag, dem 05.10.2021 um 19:05 -0500 schrieb Adam Ford:
> Add the DT node for the GPC, including all the PGC power domains,
> some of them are not fully functional yet, as they require interaction
> with the blk-ctrls to properly power up/down the peripherals.
> 
> Signed-off-by: Adam Ford <aford173@...il.com>
> ---
>  arch/arm64/boot/dts/freescale/imx8mn.dtsi | 49 +++++++++++++++++++++++
>  1 file changed, 49 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx8mn.dtsi b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
> index da6c942fb7f9..4191b5bfcdf3 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mn.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
> @@ -4,6 +4,8 @@
>   */
>  
>  #include <dt-bindings/clock/imx8mn-clock.h>
> +#include <dt-bindings/power/imx8mn-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>
> @@ -612,6 +614,53 @@ src: reset-controller@...90000 {
>  				interrupts = <GIC_SPI 89 IRQ_TYPE_LEVEL_HIGH>;
>  				#reset-cells = <1>;
>  			};
> +
> +			gpc: gpc@...a0000 {
> +				compatible = "fsl,imx8mn-gpc";
> +				reg = <0x303a0000 0x10000>;
> +				interrupt-parent = <&gic>;
> +				interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>;
> +
> +				pgc {
> +					#address-cells = <1>;
> +					#size-cells = <0>;
> +
> +					pgc_hsiomix: power-domain@0 {
> +						#power-domain-cells = <0>;
> +						reg = <IMX8MN_POWER_DOMAIN_HSIOMIX>;
> +						clocks = <&clk IMX8MN_CLK_USB1_CTRL_ROOT>;

This should be IMX8MN_CLK_USB_BUS.

Regards,
Lucas

> +					};
> +
> +					pgc_otg1: power-domain@1 {
> +						#power-domain-cells = <0>;
> +						reg = <IMX8MN_POWER_DOMAIN_OTG1>;
> +						power-domains = <&pgc_hsiomix>;
> +					};
> +
> +					pgc_gpumix: power-domain@2 {
> +						#power-domain-cells = <0>;
> +						reg = <IMX8MN_POWER_DOMAIN_GPUMIX>;
> +						clocks = <&clk IMX8MN_CLK_GPU_CORE_ROOT>,
> +							 <&clk IMX8MN_CLK_GPU_SHADER_DIV>,
> +							 <&clk IMX8MN_CLK_GPU_BUS_ROOT>,
> +							 <&clk IMX8MN_CLK_GPU_AHB>;
> +						resets = <&src IMX8MQ_RESET_GPU_RESET>;
> +					};
> +
> +					pgc_dispmix: power-domain@3 {
> +						#power-domain-cells = <0>;
> +						reg = <IMX8MN_POWER_DOMAIN_DISPMIX>;
> +						clocks = <&clk IMX8MN_CLK_DISP_AXI_ROOT>,
> +							 <&clk IMX8MN_CLK_DISP_APB_ROOT>;
> +					};
> +
> +					pgc_mipi: power-domain@4 {
> +						#power-domain-cells = <0>;
> +						reg = <IMX8MN_POWER_DOMAIN_MIPI>;
> +						power-domains = <&pgc_dispmix>;
> +					};
> +				};
> +			};
>  		};
>  
>  		aips2: bus@...00000 {