On Mon, Jan 19, 2015 at 07:52:21PM +0200, Roger Quadros wrote:
> 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@xxxxxx>
Reviewed-by: Felipe Balbi <balbi@xxxxxx>
Acked-by: Felipe Balbi <balbi@xxxxxx>
> ---
> arch/arm/boot/dts/dra72-evm.dts | 31 +++++++++++++++++++++++++++++++
> 1 file changed, 31 insertions(+)
>
> diff --git a/arch/arm/boot/dts/dra72-evm.dts b/arch/arm/boot/dts/dra72-evm.dts
> index 89085d0..d93a98f 100644
> --- a/arch/arm/boot/dts/dra72-evm.dts
> +++ b/arch/arm/boot/dts/dra72-evm.dts
> @@ -8,6 +8,7 @@
> /dts-v1/;
>
> #include "dra72x.dtsi"
> +#include <dt-bindings/gpio/gpio.h>
>
> / {
> model = "TI DRA722";
> @@ -24,6 +25,16 @@
> regulator-min-microvolt = <3300000>;
> regulator-max-microvolt = <3300000>;
> };
> +
> + extcon_usb1: extcon_usb1 {
> + compatible = "linux,extcon-usb";
> + id-gpio = <&pcf_gpio_21 1 GPIO_ACTIVE_HIGH>;
> + };
> +
> + extcon_usb2: extcon_usb2 {
> + compatible = "linux,extcon-usb";
> + id-gpio = <&pcf_gpio_21 2 GPIO_ACTIVE_HIGH>;
> + };
> };
>
> &dra7_pmx_core {
> @@ -243,6 +254,18 @@
> ti,palmas-long-press-seconds = <6>;
> };
> };
> +
> + 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>;
> + };
> };
>
> &uart1 {
> @@ -345,6 +368,14 @@
> phy-supply = <&ldo4_reg>;
> };
>
> +&omap_dwc3_1 {
> + extcon = <&extcon_usb1>;
> +};
> +
> +&omap_dwc3_2 {
> + extcon = <&extcon_usb2>;
> +};
> +
> &usb1 {
> dr_mode = "peripheral";
> pinctrl-names = "default";
> --
> 2.1.0
>
--
balbi
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