linux-kernel - [PATCH 6/9] ARM: dts: ux500: samsung-golden: Add touch screen

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20191219202052.19039-7-stephan@gerhold.net>
Date:   Thu, 19 Dec 2019 21:20:49 +0100
From:   Stephan Gerhold <stephan@...hold.net>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     linux-arm-kernel@...ts.infradead.org,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Stephan Gerhold <stephan@...hold.net>
Subject: [PATCH 6/9] ARM: dts: ux500: samsung-golden: Add touch screen

samsung-golden has an Atmel mXT224S touch controller connected to I2C.
It is supported by the existing driver for atmel,maxtouch, so all we
need to do to make it work is to define the necessary device tree nodes.

The atmel_mxt_ts driver does not support controlling regulators yet,
so add regulator-always-on for now to turn on the necessary regulators.

Signed-off-by: Stephan Gerhold <stephan@...hold.net>
---
 .../arm/boot/dts/ste-ux500-samsung-golden.dts | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/arch/arm/boot/dts/ste-ux500-samsung-golden.dts b/arch/arm/boot/dts/ste-ux500-samsung-golden.dts
index 14a084e1846b..e75a425d177e 100644
--- a/arch/arm/boot/dts/ste-ux500-samsung-golden.dts
+++ b/arch/arm/boot/dts/ste-ux500-samsung-golden.dts
@@ -142,6 +142,26 @@ imu@68 {
 			};
 		};
 
+		i2c@...10000 {
+			status = "okay";
+
+			pinctrl-names = "default", "sleep";
+			pinctrl-0 = <&i2c3_c_2_default>;
+			pinctrl-1 = <&i2c3_c_2_sleep>;
+
+			touchscreen@4a {
+				compatible = "atmel,maxtouch";
+				reg = <0x4a>;
+
+				/* GPIO218 (TSP_INT_1V8) */
+				interrupt-parent = <&gpio6>;
+				interrupts = <26 IRQ_TYPE_EDGE_FALLING>;
+
+				pinctrl-names = "default";
+				pinctrl-0 = <&tsp_default>;
+			};
+		};
+
 		prcmu@...57000 {
 			ab8505 {
 				ab8500_usb {
@@ -161,6 +181,7 @@ ab8500_ldo_aux2 {
 						regulator-name = "vreg_tsp_a3v3";
 						regulator-min-microvolt = <3300000>;
 						regulator-max-microvolt = <3300000>;
+						regulator-always-on; /* FIXME */
 					};
 
 					ab8500_ldo_aux3 {
@@ -177,6 +198,7 @@ ab8500_ldo_aux5 {
 						regulator-name = "vreg_tsp_1v8";
 						regulator-min-microvolt = <1800000>;
 						regulator-max-microvolt = <1800000>;
+						regulator-always-on; /* FIXME */
 					};
 
 					ab8500_ldo_aux6 {
@@ -309,6 +331,15 @@ golden_cfg1 {
 		};
 	};
 
+	tsp {
+		tsp_default: tsp_default {
+			golden_cfg1 {
+				pins = "GPIO218_AH11";	/* TSP_INT_1V8 */
+				ste,config = <&gpio_in_nopull>;
+			};
+		};
+	};
+
 	vibrator {
 		vibrator_default: vibrator_default {
 			golden_cfg1 {
-- 
2.24.1