ARM: dts: ux500: Add touchscreen to the Skomer

This adds touchscreen support to the Ux500 Samsung
GT-S7710 "Skomer" mobile phone.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20200516212913.485365-1-linus.walleij@linaro.org

diff --git a/arch/arm/boot/dts/ste-ux500-samsung-skomer.dts b/arch/arm/boot/dts/ste-ux500-samsung-skomer.dts
index c7d4ad34e5698181f0f9fd12200421dac61c3669..8edef161613a82cd782fdd9420f41135fc197f4a 100644 (file)
--- a/arch/arm/boot/dts/ste-ux500-samsung-skomer.dts
+++ b/arch/arm/boot/dts/ste-ux500-samsung-skomer.dts
@@ -367,7 +367,28 @@
                        pinctrl-0 = <&i2c3_c_2_default>;
                        pinctrl-1 = <&i2c3_c_2_sleep>;
 
-                       /* TODO: this should be used by the Cypress TMA140 touchscreen */
+                       /* Cypress CY8CTMA140 touchscreen */
+                       touchscreen@20 {
+                               compatible = "cypress,cy8ctma140";
+                               clock-frequency = <400000>;
+                               reg = <0x20>;
+
+                               touchscreen-size-x = <480>;
+                               touchscreen-size-y = <800>;
+                               touchscreen-max-pressure = <255>;
+
+                               /* GPIO218 for IRQ */
+                               interrupt-parent = <&gpio6>;
+                               interrupts = <26 IRQ_TYPE_EDGE_FALLING>;
+
+                               /* VDD is "digital supply" nominally 1.71-3.6V */
+                               vdd-supply = <&ab8500_ldo_aux2_reg>;
+                               /* VCPIN is "analog supply", 2.7-3.6 V */
+                               vcpin-supply = <&ab8500_ldo_aux2_reg>;
+
+                               pinctrl-names = "default";
+                               pinctrl-0 = <&tma140_skomer_default>;
+                       };
                };
 
                mcde@a0350000 {
@@ -562,6 +583,15 @@
                        };
                };
        };
+       /* Interrupt line for the Cypress TMA140 touchscreen */
+       touchscreen {
+               tma140_skomer_default: tma140_skomer {
+                       skomer_cfg1 {
+                               pins = "GPIO218_AH11";
+                               ste,config = <&gpio_in_nopull>;
+                       };
+               };
+       };
 };
 
 &ab8505_gpio {