ramips: mir3g dts define usb port Vcc volt regulator GPIO

Define USB port power on/off GPO as voltage regulator type instead of
exposing as a normal GPIO.

The GPO is now controlled by the USB driver via the voltage regulator
definition.  The regulator is of fixed output type (5V for USB) hence the
GPO switches power on/off to USB pin 1 (Vcc)

USB port power is enabled on driver load and disabled on driver unload.

Enable kernel support for fixed voltage regulator types on mt7621.

Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>

diff --git a/target/linux/ramips/dts/MIR3G.dts b/target/linux/ramips/dts/MIR3G.dts
index efe98b0e100ee3157e9b93cecf744bfb0caf0f2b..44dfc1796c2251a63a317d156901f0a03f0182ef 100644 (file)
--- a/target/linux/ramips/dts/MIR3G.dts
+++ b/target/linux/ramips/dts/MIR3G.dts
@@ -66,16 +66,19 @@
                };
        };
 
-       gpio_export {
-               compatible = "gpio-export";
-               #size-cells = <0>;
-
-               usbpower {
-                       gpio-export,name = "usbpower";
-                       gpio-export,output = <1>;
-                       gpios = <&gpio0 12 GPIO_ACTIVE_HIGH>;
-               };
+       reg_usb_vbus: reg_usb_vbus {
+               compatible = "regulator-fixed";
+               regulator-name = "usb_vbus";
+               regulator-min-microvolt = <5000000>;
+               regulator-max-microvolt = <5000000>;
+               gpio = <&gpio0 12 GPIO_ACTIVE_HIGH>;
+               enable-active-high;
        };
+
+};
+
+&xhci {
+       vbus-supply = <&reg_usb_vbus>;
 };
 
 &nand {

diff --git a/target/linux/ramips/mt7621/config-4.14 b/target/linux/ramips/mt7621/config-4.14
index 3a5cd4296ae833889f1fea179424332f22cb6446..c19d735e5cfc60e7d002775de361d79062ec6731 100644 (file)
--- a/target/linux/ramips/mt7621/config-4.14
+++ b/target/linux/ramips/mt7621/config-4.14
@@ -227,6 +227,8 @@ CONFIG_RCU_STALL_COMMON=y
 CONFIG_REGMAP=y
 CONFIG_REGMAP_I2C=y
 CONFIG_REGMAP_SPI=y
+CONFIG_REGULATOR=y
+CONFIG_REGULATOR_FIXED_VOLTAGE=y
 CONFIG_RESET_CONTROLLER=y
 CONFIG_RFS_ACCEL=y
 CONFIG_RPS=y