[PATCH v3 2/2] pxa/hx4700: Add Synaptics NavPoint (PXA27x SSP/SPI) driver

[Paul Parsons]

Add support for the Synaptics NavPoint touchpad connected to a PXA27x SSP port
in SPI slave mode. The driver implements a simple navigation pad. The four
raised dots are mapped to UP/DOWN/LEFT/RIGHT buttons and the centre of the
touchpad is mapped to the ENTER button.

Signed-off-by: Paul Parsons <lost.distance at yahoo.com>
---

V3:
Patch numbered 2/n because hx4700 platform glue depends on driver.
GPIO102 configuration moved from mfp-pxa27x.h to hx4700.c.
Renamed GPIO102_HX4700_SYNAPTICS_POWER_ON to keep global_gpios[] within 80 cols.

diff -uprN clean-3.2-rc2/arch/arm/mach-pxa/hx4700.c linux-3.2-rc2/arch/arm/mach-pxa/hx4700.c
--- clean-3.2-rc2/arch/arm/mach-pxa/hx4700.c	2011-11-15 17:02:59.000000000 +0000
+++ linux-3.2-rc2/arch/arm/mach-pxa/hx4700.c	2011-11-20 00:14:05.252421407 +0000
@@ -22,6 +22,7 @@
 #include <linux/gpio.h>
 #include <linux/gpio_keys.h>
 #include <linux/input.h>
+#include <linux/input/navpoint.h>
 #include <linux/lcd.h>
 #include <linux/mfd/htc-egpio.h>
 #include <linux/mfd/asic3.h>
@@ -111,7 +112,7 @@ static unsigned long hx4700_pin_config[]
 	GPIO113_I2S_SYSCLK,
 
 	/* SSP 1 (NavPoint) */
-	GPIO23_SSP1_SCLK,
+	GPIO23_SSP1_SCLK_IN,
 	GPIO24_SSP1_SFRM,
 	GPIO25_SSP1_TXD,
 	GPIO26_SSP1_RXD,
@@ -181,6 +182,23 @@ static struct platform_device gpio_keys
 };
 
 /*
+ * Synaptics NavPoint connected to SSP1
+ */
+
+static struct navpoint_platform_data navpoint_platform_data = {
+	.port	= 1,
+	.gpio	= GPIO102_HX4700_SYNAPTICS_ON,
+};
+
+static struct platform_device navpoint = {
+	.name	= "navpoint",
+	.id	= -1,
+	.dev = {
+		.platform_data = &navpoint_platform_data,
+	},
+};
+
+/*
  * ASIC3
  */
 
@@ -782,6 +800,7 @@ static struct platform_device pcmcia = {
 static struct platform_device *devices[] __initdata = {
 	&asic3,
 	&gpio_keys,
+	&navpoint,
 	&backlight,
 	&w3220,
 	&hx4700_lcd,
@@ -806,6 +825,7 @@ static struct gpio global_gpios[] = {
 	{ GPIO32_HX4700_RS232_ON,         GPIOF_OUT_INIT_HIGH, "RS232_ON" },
 	{ GPIO71_HX4700_ASIC3_nRESET,     GPIOF_OUT_INIT_HIGH, "ASIC3_nRESET" },
 	{ GPIO82_HX4700_EUART_RESET,      GPIOF_OUT_INIT_HIGH, "EUART_RESET" },
+	{ GPIO102_HX4700_SYNAPTICS_ON,    GPIOF_OUT_INIT_LOW,  "SYNAPTICS_ON" },
 	{ GPIO105_HX4700_nIR_ON,          GPIOF_OUT_INIT_HIGH, "nIR_EN" },
 };
 
diff -uprN clean-3.2-rc2/arch/arm/mach-pxa/include/mach/hx4700.h linux-3.2-rc2/arch/arm/mach-pxa/include/mach/hx4700.h
--- clean-3.2-rc2/arch/arm/mach-pxa/include/mach/hx4700.h	2011-11-15 17:02:59.000000000 +0000
+++ linux-3.2-rc2/arch/arm/mach-pxa/include/mach/hx4700.h	2011-11-20 00:14:44.968709678 +0000
@@ -62,7 +62,7 @@
 #define GPIO97_HX4700_nBL_DETECT		97
 #define GPIO99_HX4700_KEY_CONTACTS		99
 #define GPIO100_HX4700_AUTO_SENSE		100 /* BL auto brightness */
-#define GPIO102_HX4700_SYNAPTICS_POWER_ON	102
+#define GPIO102_HX4700_SYNAPTICS_ON		102
 #define GPIO103_HX4700_SYNAPTICS_INT		103
 #define GPIO105_HX4700_nIR_ON			105
 #define GPIO106_HX4700_CPU_BT_nRESET		106