arm64: dts: samsung,coreprimevelte: add touchscreen

Bind touchscreen for the samsung,coreprimevelte smartphone. The
downstream code sets the VDD voltage to the exact value of 3.1 V,
however it's been empirically verified that the lower bound used here
sufficies for the proper operation of the chip and is thus used for
power-saving purposes.

Signed-off-by: Karel Balej <balejk@matfyz.cz>
Reviewed-by: Duje Mihanović <duje@dujemihanovic.xyz>
Signed-off-by: Duje Mihanović <duje@dujemihanovic.xyz>

diff --git a/arch/arm64/boot/dts/marvell/mmp/pxa1908-samsung-coreprimevelte.dts b/arch/arm64/boot/dts/marvell/mmp/pxa1908-samsung-coreprimevelte.dts
index 54131b0e5617ec911e481f9ff1533f72e51ef389..0ac1a24dc410e183594f1c2e55360ebd9347ca07 100644 (file)
--- a/arch/arm64/boot/dts/marvell/mmp/pxa1908-samsung-coreprimevelte.dts
+++ b/arch/arm64/boot/dts/marvell/mmp/pxa1908-samsung-coreprimevelte.dts
@@ -311,6 +311,11 @@
                wakeup-source;
 
                regulators {
+                       ldo2: ldo2 {
+                               regulator-min-microvolt = <1900000>;
+                               regulator-max-microvolt = <3100000>;
+                       };
+
                        ldo6: ldo6 {
                                regulator-boot-on;
                                regulator-min-microvolt = <1200000>;
@@ -328,6 +333,16 @@
 
 &twsi3 {
        status = "okay";
+
+       touchscreen@50 {
+               compatible = "imagis,ist3032c";
+               reg = <0x50>;
+               interrupt-parent = <&gpio>;
+               interrupts = <72 IRQ_TYPE_EDGE_FALLING>;
+               vdd-supply = <&ldo2>;
+               touchscreen-size-x = <480>;
+               touchscreen-size-y = <800>;
+       };
 };
 
 &usb {