ARM: dts: stm32: Enable WiFi on AV96

The WiFi/Bluetooth SDIO chip is attached to SDMMC3 on AV96, describe it
in DT to make it available. Remove WiFi LED and turn it into a regulator,
because it is a GPIO controlling the WL_REG_ON input of the WiFi chip.
The LED is just an indicator connected to the same line, but not the
primary function.
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Cc: Patrick Delaunay <patrick.delaunay@st.com>
Cc: linux-stm32@st-md-mailman.stormreply.com
To: linux-arm-kernel@lists.infradead.org
Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com>

arch/arm/boot/dts/stm32mp157a-avenger96.dts

@@ -65,13 +65,6 @@ led4 {
 		};
 
 		led5 {
-			label = "yellow:wifi";
-			gpios = <&gpioz 3 GPIO_ACTIVE_HIGH>;
-			linux,default-trigger = "phy0tx";
-			default-state = "off";
-		};
-
-		led6 {
 			label = "blue:bt";
 			gpios = <&gpioz 6 GPIO_ACTIVE_HIGH>;
 			linux,default-trigger = "bluetooth-power";
@@ -103,6 +96,17 @@ vdd_io: regulator-buck-io {
 		regulator-boot-on;
 		vin-supply = <&vdd>;
 	};
+
+	wlan_pwr: regulator-wlan {
+		compatible = "regulator-fixed";
+
+		regulator-name = "wl-reg";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+
+		gpios = <&gpioz 3 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
 };
 
 &ethernet0 {
@@ -380,6 +384,26 @@ &sdmmc2 {
 	status = "okay";
 };
 
+&sdmmc3 {
+	pinctrl-names = "default", "opendrain", "sleep";
+	pinctrl-0 = <&sdmmc3_b4_pins_b>;
+	pinctrl-1 = <&sdmmc3_b4_od_pins_b>;
+	pinctrl-2 = <&sdmmc3_b4_sleep_pins_b>;
+	broken-cd;
+	non-removable;
+	st,neg-edge;
+	bus-width = <4>;
+	vmmc-supply = <&wlan_pwr>;
+	status = "okay";
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+	brcmf: bcrmf@1 {
+		reg = <1>;
+		compatible = "brcm,bcm4329-fmac";
+	};
+};
+
 &uart4 {
 	/* On Low speed expansion header */
 	label = "LS-UART1";