ARM: pxa168/teton bga: added keypad support

Support for Matrix keypad ESC, ENTER, LEFT, and RIGHT

Signed-off-by: Mark F. Brown <mark.brown314@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

arch/arm/mach-mmp/teton_bga.c

@@ -16,6 +16,8 @@
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
 #include <linux/gpio.h>
+#include <linux/input.h>
+#include <plat/pxa27x_keypad.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -30,6 +32,27 @@ static unsigned long teton_bga_pin_config[] __initdata = {
 	/* UART1 */
 	GPIO107_UART1_TXD,
 	GPIO108_UART1_RXD,
+
+	/* Keypad */
+	GPIO109_KP_MKIN1,
+	GPIO110_KP_MKIN0,
+	GPIO111_KP_MKOUT7,
+	GPIO112_KP_MKOUT6,
+};
+
+static unsigned int teton_bga_matrix_key_map[] = {
+	KEY(0, 6, KEY_ESC),
+	KEY(0, 7, KEY_ENTER),
+	KEY(1, 6, KEY_LEFT),
+	KEY(1, 7, KEY_RIGHT),
+};
+
+static struct pxa27x_keypad_platform_data teton_bga_keypad_info __initdata = {
+	.matrix_key_rows        = 2,
+	.matrix_key_cols        = 8,
+	.matrix_key_map         = teton_bga_matrix_key_map,
+	.matrix_key_map_size    = ARRAY_SIZE(teton_bga_matrix_key_map),
+	.debounce_interval      = 30,
 };
 
 static void __init teton_bga_init(void)
@@ -38,6 +61,7 @@ static void __init teton_bga_init(void)
 
 	/* on-chip devices */
 	pxa168_add_uart(1);
+	pxa168_add_keypad(&teton_bga_keypad_info);
 }
 
 MACHINE_START(TETON_BGA, "PXA168-based Teton BGA Development Platform")