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Commit bb1ea8bf authored by Maxime Ripard's avatar Maxime Ripard
Browse files

ARM: sun5i: chip: Enable Wi-Fi SDIO chip 



The WiFi chip is powered through a GPIO and two regulators in parallel.
Since that case is not supported yet, just set them as always on before we
rework the regulator framework to deal with those.

Signed-off-by: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: default avatarChen-Yu Tsai <wens@csie.org>
parent e6360493

arch/arm/boot/dts/sun5i-r8-chip.dts

+41 −0
Original line number Diff line number Diff line
@@ -74,6 +74,13 @@ 
			default-state = "on";

		};

	};



	mmc0_pwrseq: mmc0_pwrseq {

		compatible = "mmc-pwrseq-simple";

		pinctrl-names = "default";

		pinctrl-0 = <&chip_wifi_reg_on_pin>;

		reset-gpios = <&pio 2 19 GPIO_ACTIVE_LOW>; /* PC19 */

	};

};



&be0 {
@@ -131,10 +138,15 @@ 
	};

};



&mmc0_pins_a {

	allwinner,pull = <SUN4I_PINCTRL_PULL_UP>;

};



&mmc0 {

	pinctrl-names = "default";

	pinctrl-0 = <&mmc0_pins_a>;

	vmmc-supply = <&reg_vcc3v3>;

	mmc-pwrseq = <&mmc0_pwrseq>;

	bus-width = <4>;

	non-removable;

	status = "okay";
@@ -156,6 +168,13 @@ 
		allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;

	};



	chip_wifi_reg_on_pin: chip_wifi_reg_on_pin@0 {

	        allwinner,pins = "PC19";

	        allwinner,function = "gpio_out";

	        allwinner,drive = <SUN4I_PINCTRL_10_MA>;

	        allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;

	};



	chip_id_det_pin: chip_id_det_pin@0 {

		allwinner,pins = "PG2";

		allwinner,function = "gpio_in";
@@ -189,6 +208,28 @@ 
	regulator-always-on;

};



/*

 * Both LDO3 and LDO4 are used in parallel to power up the WiFi/BT

 * Chip.

 *

 * If those are not enabled, the SDIO part will not enumerate, and

 * since there's no way currently to pass DT infos to an SDIO device,

 * we cannot really do better than this ugly hack for now.

 */

&reg_ldo3 {

	regulator-min-microvolt = <3300000>;

	regulator-max-microvolt = <3300000>;

	regulator-name = "vcc-wifi-1";

	regulator-always-on;

};



&reg_ldo4 {

	regulator-min-microvolt = <3300000>;

	regulator-max-microvolt = <3300000>;

	regulator-name = "vcc-wifi-2";

	regulator-always-on;

};



&reg_ldo5 {

	regulator-min-microvolt = <1800000>;

	regulator-max-microvolt = <1800000>;