Define the GPIO expander which controls at least some camera gpios.

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
---
 arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts b/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts
index c8205ae89840..ecd727e65761 100644
--- a/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts
+++ b/arch/arm/boot/dts/ti/omap/omap4-epson-embt2ws.dts
@@ -291,6 +291,19 @@ &i2c2 {
 
 	clock-frequency = <200000>;
 
+	/* is sometimes not available, research needed */
+	gpio_head: gpio@20 {
+		compatible = "ti,tca6408";
+		reg = <0x20>;
+		gpio-controller;
+		#gpio-cells = <2>;
+	};
+
+	/*
+	 * camera chip at 0x3c, available if <&gpio_head 1> high
+	 * and <&gpio_head 5> low
+	 */
+
 	/* at head/glasses */
 	mpu9150h: imu@68 {
 		compatible = "invensense,mpu9150";
-- 
2.39.5