Input: lpc32xx_ts - add device tree support

This change implements device tree support for the LPC32xx SoC's touchscreen
controller.

Signed-off-by: Roland Stigge <stigge@antcom.de>
Reviewed-by: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

diff --git a/Documentation/devicetree/bindings/input/touchscreen/lpc32xx-tsc.txt b/Documentation/devicetree/bindings/input/touchscreen/lpc32xx-tsc.txt
new file mode 100644 (file)
index 0000000..d0c68e3
--- /dev/null
+++ b/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@40048000 {
+               compatible = "nxp,lpc32xx-tsc";
+               reg = <0x40048000 0x1000>;
+               interrupt-parent = <&mic>;
+               interrupts = <39 0>;
+       };

diff --git a/drivers/input/touchscreen/lpc32xx_ts.c b/drivers/input/touchscreen/lpc32xx_ts.c
index afcd069..e8fccbc 100644 (file)
--- a/drivers/input/touchscreen/lpc32xx_ts.c
+++ b/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_ts_pm_ops = {
 #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_driver = {
                .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);