linux-kernel - [PATCH 2/4] input: Device tree support for LPC32xx touchscreen

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Message-Id: <1334400790-10892-3-git-send-email-stigge@antcom.de>
Date:	Sat, 14 Apr 2012 12:53:08 +0200
From:	Roland Stigge <stigge@...com.de>
To:	arm@...nel.org, linux-arm-kernel@...ts.infradead.org,
	gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
	dmitry.torokhov@...il.com, axel.lin@...il.com,
	broonie@...nsource.wolfsonmicro.com, marek.vasut@...il.com,
	thierry.reding@...onic-design.de, devel@...verdev.osuosl.org,
	kevin.wells@....com, srinivas.bakki@....com
Cc:	Roland Stigge <stigge@...com.de>
Subject: [PATCH 2/4] input: Device tree support for LPC32xx touchscreen

This patch adds device tree support for the LPC32xx SoC's touchscreen
controller.

Signed-off-by: Roland Stigge <stigge@...com.de>

---

 Applies to v3.4-rc2

 Documentation/devicetree/bindings/input/touchscreen/lpc32xx-tsc.txt |   16 ++++++++++
 drivers/input/touchscreen/lpc32xx_ts.c                              |   10 ++++++
 2 files changed, 26 insertions(+)

--- /dev/null
+++ linux-2.6/Documentation/devicetree/bindings/input/touchscreen/lpc32xx-tsc.txt
@@ -0,0 +1,16 @@
+* NXP LPC32xx SoC Touchscreen Controller (TSC)
+
+Required properties:
+- compatible: must be "nxp,lpc32xx-tsc"
+- reg: physical base address of the controller and length of memory mapped
+  region.
+- interrupts: The TSC/ADC interrupt
+
+Example:
+
+	tsc@...48000 {
+		compatible = "nxp,lpc32xx-tsc";
+		reg = <0x40048000 0x1000>;
+		interrupt-parent = <&mic>;
+		interrupts = <39 0>;
+	};
--- linux-2.6.orig/drivers/input/touchscreen/lpc32xx_ts.c
+++ linux-2.6/drivers/input/touchscreen/lpc32xx_ts.c
@@ -22,6 +22,7 @@
 #include <linux/clk.h>
 #include <linux/io.h>
 #include <linux/slab.h>
+#include <linux/of.h>
 
 /*
  * Touchscreen controller register offsets
@@ -383,6 +384,14 @@ static const struct dev_pm_ops lpc32xx_t
 #define LPC32XX_TS_PM_OPS NULL
 #endif
 
+#ifdef CONFIG_OF
+static struct of_device_id lpc32xx_tsc_of_match[] = {
+	{ .compatible = "nxp,lpc32xx-tsc", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, lpc32xx_tsc_of_match);
+#endif
+
 static struct platform_driver lpc32xx_ts_driver = {
 	.probe		= lpc32xx_ts_probe,
 	.remove		= __devexit_p(lpc32xx_ts_remove),
@@ -390,6 +399,7 @@ static struct platform_driver lpc32xx_ts
 		.name	= MOD_NAME,
 		.owner	= THIS_MODULE,
 		.pm	= LPC32XX_TS_PM_OPS,
+		.of_match_table = of_match_ptr(lpc32xx_tsc_of_match),
 	},
 };
 module_platform_driver(lpc32xx_ts_driver);
--
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