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Commit 99165b93 authored by Levin Du's avatar Levin Du Committed by Heiko Stuebner
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arm64: dts: rockchip: add sdmmc UHS support for roc-rk3328-cc 



In roc-rk3328-cc board, the signal voltage of sdmmc is supplied by the
vcc_sdio regulator, which is a mux between 1.8V and 3.3V, controlled by
a special output only gpio pin labeled "gpiomut_pmuio_iout",
corresponding bit 1 of the syscon GRF_SOC_CON10.

This special pin can now be reference as <&grf_gpio 0>, thanks to the
gpio-syscon driver, which makes writing regulator-gpio possible.

If the signal voltage changes, the io domain needs to change
correspondingly.

To use this feature, the following options are required in kernel config:
 - CONFIG_GPIO_SYSCON=y
 - CONFIG_POWER_AVS=y
 - CONFIG_ROCKCHIP_IODOMAIN=y

Signed-off-by: default avatarLevin Du <djw@t-chip.com.cn>
Signed-off-by: default avatarHeiko Stuebner <heiko@sntech.de>
parent 692ff61e

arch/arm64/boot/dts/rockchip/rk3328-roc-cc.dts

+19 −1
Original line number Diff line number Diff line
@@ -41,6 +41,19 @@ 
		vin-supply = <&vcc_io>;

	};



	vcc_sdio: sdmmcio-regulator {

		compatible = "regulator-gpio";

		gpios = <&grf_gpio 0 GPIO_ACTIVE_HIGH>;

		states = <1800000 0x1

			  3300000 0x0>;

		regulator-name = "vcc_sdio";

		regulator-type = "voltage";

		regulator-min-microvolt = <1800000>;

		regulator-max-microvolt = <3300000>;

		regulator-always-on;

		vin-supply = <&vcc_sys>;

	};



	vcc_host1_5v: vcc_otg_5v: vcc-host1-5v-regulator {

		compatible = "regulator-fixed";

		enable-active-high;
@@ -213,7 +226,7 @@ 


	vccio1-supply = <&vcc_io>;

	vccio2-supply = <&vcc18_emmc>;

	vccio3-supply = <&vcc_io>;

	vccio3-supply = <&vcc_sdio>;

	vccio4-supply = <&vcc_18>;

	vccio5-supply = <&vcc_io>;

	vccio6-supply = <&vcc_io>;
@@ -242,7 +255,12 @@ 
	max-frequency = <150000000>;

	pinctrl-names = "default";

	pinctrl-0 = <&sdmmc0_clk &sdmmc0_cmd &sdmmc0_dectn &sdmmc0_bus4>;

	sd-uhs-sdr12;

	sd-uhs-sdr25;

	sd-uhs-sdr50;

	sd-uhs-sdr104;

	vmmc-supply = <&vcc_sd>;

	vqmmc-supply = <&vcc_sdio>;

	status = "okay";

};