ARM: dts: dra7-evm: Add extcon nodes for USB

On this EVM, the USB cable state has to be determined via the
ID pin tied to a GPIO line. We use the gpio-usb-extcon driver
to read the ID pin and the extcon framework to forward
the USB cable state information to the USB driver so the
controller can be configured in the right mode (host/peripheral).

Gets USB peripheral mode to work on this EVM.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/boot/dts/dra7-evm.dts b/arch/arm/boot/dts/dra7-evm.dts
index 10b725c7bfc02fc79e8c694150ec1e23c5493175..c1d0ac7bd002f06f16a1288e0faceeab9dfde6a5 100644 (file)
--- a/arch/arm/boot/dts/dra7-evm.dts
+++ b/arch/arm/boot/dts/dra7-evm.dts
@@ -26,6 +26,16 @@ mmc2_3v3: fixedregulator-mmc2 {
                regulator-max-microvolt = <3300000>;
        };
 
+       extcon_usb1: extcon_usb1 {
+               compatible = "linux,extcon-usb-gpio";
+               id-gpio = <&pcf_gpio_21 1 GPIO_ACTIVE_HIGH>;
+       };
+
+       extcon_usb2: extcon_usb2 {
+               compatible = "linux,extcon-usb-gpio";
+               id-gpio = <&pcf_gpio_21 2 GPIO_ACTIVE_HIGH>;
+       };
+
        vtt_fixed: fixedregulator-vtt {
                compatible = "regulator-fixed";
                regulator-name = "vtt_fixed";
@@ -391,6 +401,19 @@ ldousb_reg: ldousb {
                        };
                };
        };
+
+       pcf_gpio_21: gpio@21 {
+               compatible = "ti,pcf8575";
+               reg = <0x21>;
+               lines-initial-states = <0x1408>;
+               gpio-controller;
+               #gpio-cells = <2>;
+               interrupt-parent = <&gpio6>;
+               interrupts = <11 IRQ_TYPE_EDGE_FALLING>;
+               interrupt-controller;
+               #interrupt-cells = <2>;
+       };
+
 };
 
 &i2c2 {
@@ -520,6 +543,14 @@ partition@9 {
        };
 };
 
+&omap_dwc3_1 {
+       extcon = <&extcon_usb1>;
+};
+
+&omap_dwc3_2 {
+       extcon = <&extcon_usb2>;
+};
+
 &usb1 {
        dr_mode = "peripheral";
        pinctrl-names = "default";