ARM: dts: Add trackpad to exynos5250-spring

The HP Chromebook 11 uses an Atmel maXTouch as trackpad.
The keymap was found by trial-and-error.

Signed-off-by: Andreas Faerber <afaerber@suse.de>
Reviewed-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/exynos5250-spring.dts b/arch/arm/boot/dts/exynos5250-spring.dts
index cc3361afba49..f02775487cd4 100644
--- a/arch/arm/boot/dts/exynos5250-spring.dts
+++ b/arch/arm/boot/dts/exynos5250-spring.dts
@@ -330,6 +330,22 @@
         status = "okay";
         samsung,i2c-sda-delay = <100>;
         samsung,i2c-max-bus-freq = <378000>;
+
+        trackpad@4b {
+                compatible = "atmel,maxtouch";
+                reg = <0x4b>;
+                interrupt-parent = <&gpx1>;
+                interrupts = <2 IRQ_TYPE_EDGE_FALLING>;
+                pinctrl-names = "default";
+                pinctrl-0 = <&trackpad_irq>;
+                linux,gpio-keymap = <KEY_RESERVED
+                                     KEY_RESERVED
+                                     KEY_RESERVED
+                                     KEY_RESERVED
+                                     KEY_RESERVED
+                                     BTN_LEFT>;
+                wakeup-source;
+        };
 };
 
 /*
@@ -465,6 +481,13 @@
                 samsung,pin-drv = <0>;
         };
 
+        trackpad_irq: trackpad-irq {
+                samsung,pins = "gpx1-2";
+                samsung,pin-function = <0xf>;
+                samsung,pin-pud = <0>;
+                samsung,pin-drv = <0>;
+        };
+
         power_key_irq: power-key-irq {
                 samsung,pins = "gpx1-3";
                 samsung,pin-function = <0>;