linux-kernel - [PATCH 07/11] arm: tegra: colibri_t30: activate stmpe811 touch controller

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Message-Id: <1440777586-19545-8-git-send-email-marcel.ziswiler@toradex.com>
Date:	Fri, 28 Aug 2015 17:59:42 +0200
From:	Marcel Ziswiler <marcel.ziswiler@...adex.com>
To:	linux-tegra@...r.kernel.org
Cc:	Marcel Ziswiler <marcel.ziswiler@...adex.com>,
	Russell King <linux@....linux.org.uk>,
	Thierry Reding <thierry.reding@...il.com>,
	devicetree@...r.kernel.org, Kumar Gala <galak@...eaurora.org>,
	Stephen Warren <swarren@...dotorg.org>,
	linux-kernel@...r.kernel.org,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Alexandre Courbot <gnurou@...il.com>,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 07/11] arm: tegra: colibri_t30: activate stmpe811 touch controller

Activate STMPE811 touch controller as found on Colibri T30 modules.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@...adex.com>
---

 arch/arm/boot/dts/tegra30-colibri.dtsi | 40 ++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/arch/arm/boot/dts/tegra30-colibri.dtsi b/arch/arm/boot/dts/tegra30-colibri.dtsi
index fba3d2a..5f8ec5c 100644
--- a/arch/arm/boot/dts/tegra30-colibri.dtsi
+++ b/arch/arm/boot/dts/tegra30-colibri.dtsi
@@ -320,6 +320,46 @@
 			};
 		};
 
+		/* STMPE811 touch screen controller */
+		stmpe811@41 {
+			compatible = "st,stmpe811";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x41>;
+			interrupts = <TEGRA_GPIO(V, 0) IRQ_TYPE_LEVEL_LOW>;
+			interrupt-parent = <&gpio>;
+			interrupt-controller;
+			id = <0>;
+			blocks = <0x5>;
+			irq-trigger = <0x1>;
+
+			stmpe_touchscreen {
+				compatible = "st,stmpe-ts";
+				reg = <0>;
+				/* 3.25 MHz ADC clock speed */
+				st,adc-freq = <1>;
+				/* 8 sample average control */
+				st,ave-ctrl = <3>;
+				/* 7 length fractional part in z */
+				st,fraction-z = <7>;
+				/*
+				 * 50 mA typical 80 mA max touchscreen drivers
+				 * current limit value
+				 */
+				st,i-drive = <1>;
+				/* 12-bit ADC */
+				st,mod-12b = <1>;
+				/* internal ADC reference */
+				st,ref-sel = <0>;
+				/* ADC converstion time: 80 clocks */
+				st,sample-time = <4>;
+				/* 1 ms panel driver settling time */
+				st,settling = <3>;
+				/* 5 ms touch detect interrupt delay */
+				st,touch-det-delay = <5>;
+			};
+		};
+
 		/*
 		 * LM95245 temperature sensor
 		 * Note: OVERT_N directly connected to PMIC PWRDN
-- 
2.4.3

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