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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>
master
Kevin Darbyshire-Bryant 2018-06-07 16:33:57 +00:00 committed by John Crispin
parent 4363b5362f
commit 8110bf18f4
2 changed files with 14 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
target/linux/ramips/dts/MIR3G.dts
View File

@ -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 {

2
target/linux/ramips/mt7621/config-4.14
View File

@ -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