[PATCH 12/12] arm64: dts: allwinner: orange-pi-3: Enable WiFi

[megous@megous.com]

From: Ondrej Jirman <megous@megous.com>

Orange Pi 3 has AP6256 WiFi/BT module. WiFi part of the module is
called bcm43356 and can be used with the brcmfmac driver. The module
is powered by the two always on regulators (not AXP805).

WiFi uses a PG port with 1.8V voltage level signals. SoC needs to be
configured so that it sets up an 1.8V input bias on this port. This is
done by the pio driver by reading the vcc-pg-supply voltage.

You'll need a fw_bcm43456c5_ag.bin firmware file and nvram.txt
configuration that can be found in the Xulongs's repository for H6:

https://github.com/orangepi-xunlong/OrangePiH6_external/tree/master/ap6256

Mainline brcmfmac driver expects the firmware and nvram at the
following paths relative to the firmware directory:

  brcm/brcmfmac43456-sdio.bin
  brcm/brcmfmac43456-sdio.txt

Signed-off-by: Ondrej Jirman <megous@megous.com>
---
 .../dts/allwinner/sun50i-h6-orangepi-3.dts    | 48 +++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi-3.dts b/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi-3.dts
index 5270142527f5..6a201829bb62 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi-3.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi-3.dts
@@ -66,6 +66,26 @@
 		regulator-always-on;
 	};
 
+	reg_vcc33_wifi: vcc33-wifi {
+		/* Always on 3.3V regulator for WiFi and BT */
+		compatible = "regulator-fixed";
+		regulator-name = "vcc33-wifi";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-always-on;
+                vin-supply = <&reg_vcc5v>;
+	};
+
+	reg_vcc_wifi_io: vcc-wifi-io {
+		/* Always on 1.8V/300mA regulator for WiFi and BT IO */
+		compatible = "regulator-fixed";
+		regulator-name = "vcc-wifi-io";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		regulator-always-on;
+                vin-supply = <&reg_vcc33_wifi>;
+	};
+
 	/*
 	 * The board uses 2.5V RGMII signalling. Power sequence
 	 * to enable the phy is to enable GMAC-2V5 and GMAC-3V3 (aldo2)
@@ -86,6 +106,14 @@
                  */
                 vin-supply = <&reg_aldo2>; /* GMAC-3V3 */
         };
+
+	wifi_pwrseq: wifi_pwrseq {
+		compatible = "mmc-pwrseq-simple";
+		clocks = <&rtc 1>;
+		clock-names = "ext_clock";
+		reset-gpios = <&r_pio 1 3 GPIO_ACTIVE_LOW>; /* PM3 */
+		post-power-on-delay-ms = <200>;
+	};
 };
 
 &cpu0 {
@@ -146,6 +174,25 @@
 	status = "okay";
 };
 
+&mmc1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mmc1_pins>;
+	vmmc-supply = <&reg_vcc33_wifi>;
+	vqmmc-supply = <&reg_vcc_wifi_io>;
+	mmc-pwrseq = <&wifi_pwrseq>;
+	bus-width = <4>;
+	non-removable;
+	status = "okay";
+
+	brcm: sdio-wifi@1 {
+		reg = <1>;
+		compatible = "brcm,bcm4329-fmac";
+		interrupt-parent = <&r_pio>;
+		interrupts = <1 0 IRQ_TYPE_LEVEL_LOW>; /* PM0 */
+		interrupt-names = "host-wake";
+	};
+};
+
 &ohci0 {
 	status = "okay";
 };
@@ -157,6 +204,7 @@
 &pio {
 	vcc-pc-supply = <&reg_bldo2>;
 	vcc-pd-supply = <&reg_cldo1>;
+	vcc-pg-supply = <&reg_vcc_wifi_io>;
 };
 
 &r_i2c {
-- 
2.21.0