arm64: dts: renesas: ulcb-kf: Add support for TI WL1837

This patch adds description of TI WL1837 and links interfaces
to communicate with the IC, namely the SDIO interface to WLAN.

Signed-off-by: Spyridon Papageorgiou <spapageorgiou@de.adit-jv.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi b/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi
index 7a09576..27851a7 100644 (file)
--- a/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi
+++ b/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi
@@ -38,6 +38,18 @@
                regulator-min-microvolt = <5000000>;
                regulator-max-microvolt = <5000000>;
        };
+
+       wlan_en: regulator-wlan_en {
+               compatible = "regulator-fixed";
+               regulator-name = "wlan-en-regulator";
+
+               regulator-min-microvolt = <3300000>;
+               regulator-max-microvolt = <3300000>;
+
+               gpio = <&gpio_exp_74 4 GPIO_ACTIVE_HIGH>;
+               startup-delay-us = <70000>;
+               enable-active-high;
+       };
 };
 
 &can0 {
@@ -88,6 +100,13 @@
                        line-name = "Audio_Out_OFF";
                };
 
+               sd-wifi-mux {
+                       gpio-hog;
+                       gpios = <5 GPIO_ACTIVE_HIGH>;
+                       output-low;     /* Connect WL1837 */
+                       line-name = "SD WiFi mux";
+               };
+
                hub_pwen {
                        gpio-hog;
                        gpios = <6 GPIO_ACTIVE_HIGH>;
@@ -254,6 +273,12 @@
                function = "scif1";
        };
 
+       sdhi3_pins: sdhi3 {
+               groups = "sdhi3_data4", "sdhi3_ctrl";
+               function = "sdhi3";
+               power-source = <3300>;
+       };
+
        usb0_pins: usb0 {
                groups = "usb0";
                function = "usb0";
@@ -273,6 +298,30 @@
        status = "okay";
 };
 
+&sdhi3 {
+       pinctrl-0 = <&sdhi3_pins>;
+       pinctrl-names = "default";
+
+       vmmc-supply = <&wlan_en>;
+       vqmmc-supply = <&wlan_en>;
+       bus-width = <4>;
+       no-1-8-v;
+       non-removable;
+       cap-power-off-card;
+       keep-power-in-suspend;
+       max-frequency = <26000000>;
+       status = "okay";
+
+       #address-cells = <1>;
+       #size-cells = <0>;
+       wlcore: wlcore@2 {
+               compatible = "ti,wl1837";
+               reg = <2>;
+               interrupt-parent = <&gpio1>;
+               interrupts = <25 IRQ_TYPE_EDGE_FALLING>;
+       };
+};
+
 &usb2_phy0 {
        pinctrl-0 = <&usb0_pins>;
        pinctrl-names = "default";