This device uses an ID pin set to active high to detect USB-OTG devices. Add support for it on extcon-usb-gpio.
Signed-off-by: Erikas Bitovtas <[email protected]> --- This device uses an ID pin to identify USB-OTG devices. In this commit we add support for USB-OTG gpio over pinctrl in extcon-usb-gpio. For USB to work in host mode, a vbus-supply is also needed. On this device, vbus is supplied by Summit Microelectronics SMB358 charging IC, for which there is a driver in mainline. Unfortunately, it cannot be added to this device tree at the moment, because charging detection does not work correctly - device begins to charge only upon probing the charger driver module. For now, we add just the pin - USB-OTG will require an adapter with an external power supply. --- arch/arm64/boot/dts/qcom/msm8939-asus-z00t.dts | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/qcom/msm8939-asus-z00t.dts b/arch/arm64/boot/dts/qcom/msm8939-asus-z00t.dts index ea90b00a2c8a..6c19044c24bc 100644 --- a/arch/arm64/boot/dts/qcom/msm8939-asus-z00t.dts +++ b/arch/arm64/boot/dts/qcom/msm8939-asus-z00t.dts @@ -127,7 +127,7 @@ reg_sd_vmmc: regulator-sdcard-vmmc { usb_id: usb-id { compatible = "linux,extcon-usb-gpio"; id-gpios = <&tlmm 110 GPIO_ACTIVE_HIGH>; - pinctrl-0 = <&usb_id_default>; + pinctrl-0 = <&usb_id_default>, <&usb_id_switch_default>; pinctrl-names = "default"; }; }; @@ -330,4 +330,11 @@ mag_reset_default: mag-reset-default-state { drive-strength = <2>; bias-disable; }; + + usb_id_switch_default: usb-id-switch-default-state { + pins = "gpio121"; + function = "gpio"; + drive-strength = <2>; + output-high; + }; }; --- base-commit: b0501426597b91ad69359c312e32fefe4cd8ec67 change-id: 20260312-z00t-otg-pin-41e102d92c4d Best regards, -- Erikas Bitovtas <[email protected]>
