[PATCH 3/3] ARM: dts: sunxi: enable SDIO Wi-Fi on Orange Pi Zero

[Icenowy Zheng]

There's a Allwinner's XR819 SDIO Wi-Fi module soldered on the board of
Orange Pi Zero, which used a dedicated regulator to power.

Add the device tree node of the regulator, the enable gpio (with
mmc-pwrseq) and the sdio controller.

There's a out-of-tree driver tested to work with this device tree.

Signed-off-by: Icenowy Zheng <icenowy at aosc.xyz>
---
New patch in the patchset, since a out-of-tree working xradio driver is done.

If there is any problem in this patch, it can be omitted.

 arch/arm/boot/dts/sun8i-h2plus-orangepi-zero.dts | 42 ++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/arch/arm/boot/dts/sun8i-h2plus-orangepi-zero.dts b/arch/arm/boot/dts/sun8i-h2plus-orangepi-zero.dts
index b428e47..39cac26 100644
--- a/arch/arm/boot/dts/sun8i-h2plus-orangepi-zero.dts
+++ b/arch/arm/boot/dts/sun8i-h2plus-orangepi-zero.dts
@@ -79,6 +79,24 @@
 			gpios = <&pio 0 17 GPIO_ACTIVE_HIGH>;
 		};
 	};
+
+	reg_vcc_wifi: reg_vcc_wifi {
+		compatible = "regulator-fixed";
+		pinctrl-names = "default";
+		pinctrl-0 = <&vcc_wifi_pin_opi0>;
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-name = "vcc-wifi";
+		enable-active-high;
+		gpio = <&pio 0 20 GPIO_ACTIVE_HIGH>;
+	};
+
+	wifi_pwrseq: wifi_pwrseq {
+		compatible = "mmc-pwrseq-simple";
+		pinctrl-names = "default";
+		pinctrl-0 = <&wifi_pwrseq_pin_opi0>;
+		reset-gpios = <&r_pio 0 7 GPIO_ACTIVE_LOW>;
+	};
 };
 
 &ehci1 {
@@ -95,6 +113,20 @@
 	status = "okay";
 };
 
+&mmc1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mmc1_pins_a>;
+	vmmc-supply = <&reg_vcc_wifi>;
+	mmc-pwrseq = <&wifi_pwrseq>;
+	bus-width = <4>;
+	non-removable;
+	status = "okay";
+};
+
+&mmc1_pins_a {
+	allwinner,pull = <SUN4I_PINCTRL_PULL_UP>;
+};
+
 &ohci1 {
 	status = "okay";
 };
@@ -104,6 +136,11 @@
 		pins = "PA17";
 		function = "gpio_out";
 	};
+
+	vcc_wifi_pin_opi0: vcc_wifi_pin at 0 {
+		allwinner,pins = "PA20";
+		allwinner,function = "gpio_out";
+	};
 };
 
 &r_pio {
@@ -111,6 +148,11 @@
 		pins = "PL10";
 		function = "gpio_out";
 	};
+
+	wifi_pwrseq_pin_opi0: wifi_pwrseq_pin at 0 {
+		allwinner,pins = "PL7";
+		allwinner,function = "gpio_out";
+	};
 };
 
 &uart0 {
-- 
2.10.2