[ARM] pxa: add partial keypad support for mainstone

This is partial because mainstone's keypad is really special, some of
the keys like '1', '2', ... are actually connected to two row/column
juntions, thus pressing '1' is equivalent to pressing 'A' & 'H'.

This is really brain damanged since it makes distinguishing between
pressing '1' and multiple keys pressing of 'A' & 'H' difficult.

So these special keys are not supported for the time being.
Signed-off-by: eric miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-pxa/mainstone.c

@@ -49,6 +49,7 @@
 #include <asm/arch/mmc.h>
 #include <asm/arch/irda.h>
 #include <asm/arch/ohci.h>
+#include <asm/arch/pxa27x_keypad.h>
 
 #include "generic.h"
 #include "devices.h"
@@ -548,6 +549,57 @@ static struct pxaohci_platform_data mainstone_ohci_platform_data = {
 	.init		= mainstone_ohci_init,
 };
 
+#if defined(CONFIG_KEYBOARD_PXA27x) || defined(CONFIG_KEYBOARD_PXA27x_MODULES)
+static unsigned int mainstone_matrix_keys[] = {
+	KEY(0, 0, KEY_A), KEY(1, 0, KEY_B), KEY(2, 0, KEY_C),
+	KEY(3, 0, KEY_D), KEY(4, 0, KEY_E), KEY(5, 0, KEY_F),
+	KEY(0, 1, KEY_G), KEY(1, 1, KEY_H), KEY(2, 1, KEY_I),
+	KEY(3, 1, KEY_J), KEY(4, 1, KEY_K), KEY(5, 1, KEY_L),
+	KEY(0, 2, KEY_M), KEY(1, 2, KEY_N), KEY(2, 2, KEY_O),
+	KEY(3, 2, KEY_P), KEY(4, 2, KEY_Q), KEY(5, 2, KEY_R),
+	KEY(0, 3, KEY_S), KEY(1, 3, KEY_T), KEY(2, 3, KEY_U),
+	KEY(3, 3, KEY_V), KEY(4, 3, KEY_W), KEY(5, 3, KEY_X),
+	KEY(2, 4, KEY_Y), KEY(3, 4, KEY_Z),
+
+	KEY(0, 4, KEY_DOT),	/* . */
+	KEY(1, 4, KEY_CLOSE),	/* @ */
+	KEY(4, 4, KEY_SLASH),
+	KEY(5, 4, KEY_BACKSLASH),
+	KEY(0, 5, KEY_HOME),
+	KEY(1, 5, KEY_LEFTSHIFT),
+	KEY(2, 5, KEY_SPACE),
+	KEY(3, 5, KEY_SPACE),
+	KEY(4, 5, KEY_ENTER),
+	KEY(5, 5, KEY_BACKSPACE),
+
+	KEY(0, 6, KEY_UP),
+	KEY(1, 6, KEY_DOWN),
+	KEY(2, 6, KEY_LEFT),
+	KEY(3, 6, KEY_RIGHT),
+	KEY(4, 6, KEY_SELECT),
+};
+
+struct pxa27x_keypad_platform_data mainstone_keypad_info = {
+	.matrix_key_rows	= 6,
+	.matrix_key_cols	= 7,
+	.matrix_key_map		= mainstone_matrix_keys,
+	.matrix_key_map_size	= ARRAY_SIZE(mainstone_matrix_keys),
+
+	.enable_rotary0		= 1,
+	.rotary0_up_key		= KEY_UP,
+	.rotary0_down_key	= KEY_DOWN,
+
+	.debounce_interval	= 30,
+};
+
+static void __init mainstone_init_keypad(void)
+{
+	pxa_set_keypad_info(&mainstone_keypad_info);
+}
+#else
+static inline void mainstone_init_keypad(void) {}
+#endif
+
 static void __init mainstone_init(void)
 {
 	int SW7 = 0;  /* FIXME: get from SCR (Mst doc section 3.2.1.1) */
@@ -585,6 +637,8 @@ static void __init mainstone_init(void)
 	pxa_set_mci_info(&mainstone_mci_platform_data);
 	pxa_set_ficp_info(&mainstone_ficp_platform_data);
 	pxa_set_ohci_info(&mainstone_ohci_platform_data);
+
+	mainstone_init_keypad();
 }