From: Roger Quadros <rogerq@ti.com>
Date: Mon, 26 Jan 2015 12:15:29 +0000 (+0200)
Subject: ARM: dts: dra72-evm: Add extcon nodes for USB
X-Git-Tag: firefly_0821_release~176^2~2307^2~2^2~2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=f56de327b4c41aa8dece7f32ab76571fac4bf586;p=firefly-linux-kernel-4.4.55.git

ARM: dts: dra72-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/dra72-evm.dts b/arch/arm/boot/dts/dra72-evm.dts
index cacddd74c516..4d8711713610 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-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>;
+	};
 };
 
 &dra7_pmx_core {
@@ -255,6 +266,18 @@
 			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 {
@@ -357,6 +380,14 @@
 	phy-supply = <&ldo4_reg>;
 };
 
+&omap_dwc3_1 {
+	extcon = <&extcon_usb1>;
+};
+
+&omap_dwc3_2 {
+	extcon = <&extcon_usb2>;
+};
+
 &usb1 {
 	dr_mode = "peripheral";
 	pinctrl-names = "default";