The Dragonboard-410c is able to act either as USB Host or Device.
The role can be determined at runtime via the USB_HS_ID pin which is
derived from the micro-usb port VBUS pin.
In Host role, SoC USB D+/D- are routed to the onboard USB 2.0 HUB.
In Device role, SoC USB D+/D- are routed to the USB 2.0 micro B port.
Routing is selected via USB_SW_SEL_PM gpio.
In device role USB HUB can be held in reset.
chipidea driver expects two extcon device pointers, one for the
EXTCON_USB event and one for the EXTCON_USB_HOST event. Since
the extcon-usb-gpio device is capable of generating both these
events, point two times to this extcon device.
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Link: https://lore.kernel.org/r/1576083014-5842-1-git-send-email-loic.poulain@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
&pm8916_gpios {
usb_hub_reset_pm: usb_hub_reset_pm {
+ pinconf {
+ pins = "gpio3";
+ function = PMIC_GPIO_FUNC_NORMAL;
+ input-disable;
+ output-high;
+ };
+ };
+
+ usb_hub_reset_pm_device: usb_hub_reset_pm_device {
pinconf {
pins = "gpio3";
function = PMIC_GPIO_FUNC_NORMAL;
};
};
+ usb_sw_sel_pm_device: usb_sw_sel_pm_device {
+ pinconf {
+ pins = "gpio4";
+ function = PMIC_GPIO_FUNC_NORMAL;
+ power-source = <PM8916_GPIO_VPH>;
+ input-disable;
+ output-low;
+ };
+ };
+
pm8916_gpios_leds: pm8916_gpios_leds {
pinconf {
pins = "gpio1", "gpio2";
};
usb@78d9000 {
- extcon = <&usb_id>;
+ extcon = <&usb_id>, <&usb_id>;
status = "okay";
adp-disable;
hnp-disable;
srp-disable;
- dr_mode = "host";
- pinctrl-names = "default";
- pinctrl-0 = <&usb_sw_sel_pm>;
+ dr_mode = "otg";
+ pinctrl-names = "default", "device";
+ pinctrl-0 = <&usb_sw_sel_pm &usb_hub_reset_pm>;
+ pinctrl-1 = <&usb_sw_sel_pm_device &usb_hub_reset_pm_device>;
ulpi {
phy {
v1p8-supply = <&pm8916_l7>;
usb_id: usb-id {
compatible = "linux,extcon-usb-gpio";
- vbus-gpio = <&msmgpio 121 GPIO_ACTIVE_HIGH>;
+ id-gpio = <&msmgpio 121 GPIO_ACTIVE_HIGH>;
pinctrl-names = "default";
pinctrl-0 = <&usb_id_default>;
};