[v2,2/2] ARM: dts: am335x-icev2: Add nodes for gpio-decoder
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Message ID 20160823061649.3394-3-vigneshr@ti.com
State New
Headers show

Commit Message

Vignesh Raghavendra Aug. 23, 2016, 6:16 a.m. UTC
AM335x ICE board has a rotary-switch connected to PCA9536 I2C GPIO
expander. The position of the rotary-switch is reflected by status of
GPIO lines. Add gpio-decoder node to read these GPIO line status via
gpio-decoder driver and report it as an input event to the system.

Signed-off-by: Vignesh R <vigneshr@ti.com>
---

v2: Update DT node name.

 arch/arm/boot/dts/am335x-icev2.dts | 9 +++++++++
 1 file changed, 9 insertions(+)

Patch
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diff --git a/arch/arm/boot/dts/am335x-icev2.dts b/arch/arm/boot/dts/am335x-icev2.dts
index bc0190e4f10f..d3c53e5910c4 100644
--- a/arch/arm/boot/dts/am335x-icev2.dts
+++ b/arch/arm/boot/dts/am335x-icev2.dts
@@ -139,6 +139,15 @@ 
 			default-state = "off";
 		};
 	};
+	gpio-decoder {
+		compatible = "gpio-decoder";
+		gpios = <&pca9536 3 GPIO_ACTIVE_HIGH>,
+			<&pca9536 2 GPIO_ACTIVE_HIGH>,
+			<&pca9536 1 GPIO_ACTIVE_HIGH>,
+			<&pca9536 0 GPIO_ACTIVE_HIGH>;
+		linux,axis = <0>; /* ABS_X */
+		decoder,max-value = <9>;
+	};
 };
 
 &am33xx_pinmux {