ath79: Fix glinet ar300m usb not working

glinet forum users reported the problem at
https://forum.gl-inet.com/t/gl-ar300m16-openwrt-22-03-0-rc5-usb-port-power-off-by-default/23199

The current code uses the regulator framework to control the USB power
supply. Although usb0 described in DTS refers to the regulator by
vbus-supply, but there is no code related to regulator implemented
in the USB driver of QCA953X, so the USB of the device cannot work.

Under the regulator framework, adding the regulator-always-on attribute
fixes this problem, but it means that USB power will not be able to be
turned off. Since we need to control the USB power supply in user space,
I didn't find any other better way under the regulator framework of Linux,
so I directly export gpio.

Signed-off-by: Luo Chongjun <luochongjun@gl-inet.com>

diff --git a/target/linux/ath79/dts/qca9531_glinet_gl-ar300m-lite.dts b/target/linux/ath79/dts/qca9531_glinet_gl-ar300m-lite.dts
index a34abb1dd2d87fbad9cb5f9724e2720990eefc91..c712236114cc3d0637f0c4fbc6318fd610f409ac 100644 (file)
--- a/target/linux/ath79/dts/qca9531_glinet_gl-ar300m-lite.dts
+++ b/target/linux/ath79/dts/qca9531_glinet_gl-ar300m-lite.dts
@@ -7,7 +7,6 @@
        model = "GL.iNet GL-AR300M-Lite";
 };
 
-/delete-node/ &reg_usb_vbus;
 
 /delete-node/ &nand_flash;
 
@@ -30,6 +29,3 @@
        label = "green:wlan";
 };
 
-&usb0 {
-       /delete-property/ vbus-supply;
-};

diff --git a/target/linux/ath79/dts/qca9531_glinet_gl-ar300m.dtsi b/target/linux/ath79/dts/qca9531_glinet_gl-ar300m.dtsi
index 6c89db1b8cc171c908458f483eab3a690d006fe9..667f779b171ff90a6d8a70d27c894c4e9bc5984e 100644 (file)
--- a/target/linux/ath79/dts/qca9531_glinet_gl-ar300m.dtsi
+++ b/target/linux/ath79/dts/qca9531_glinet_gl-ar300m.dtsi
@@ -37,14 +37,14 @@
                };
        };
 
-       reg_usb_vbus: reg_usb_vbus {
-               compatible = "regulator-fixed";
-
-               regulator-name = "usb_vbus";
-               regulator-min-microvolt = <5000000>;
-               regulator-max-microvolt = <5000000>;
-               gpio = <&gpio 2 GPIO_ACTIVE_HIGH>;
-               enable-active-high;
+       gpio-export {
+               compatible = "gpio-export";
+
+               gpio_usb_power {
+                       gpio-export,name = "usb_power";
+                       gpio-export,output = <1>;
+                       gpios = <&gpio 2 GPIO_ACTIVE_HIGH>;
+               };
        };
 
        leds {
@@ -142,7 +142,6 @@
 };
 
 &usb0 {
-       vbus-supply = <&reg_usb_vbus>;
        status = "okay";
 };