ARM: mach-shmobile: mackerel: Add keypad tca6408a support

This patch maps key0/key1/key2/key3 as HOME/MENU/BACK/POWER buttons
on mackerel board.

Signed-off-by: Tony SIM <chinyeow.sim.xt@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

diff --git a/arch/arm/mach-shmobile/board-mackerel.c b/arch/arm/mach-shmobile/board-mackerel.c
index a0caa9e..3e30a52 100644 (file)
--- a/arch/arm/mach-shmobile/board-mackerel.c
+++ b/arch/arm/mach-shmobile/board-mackerel.c
@@ -36,6 +36,7 @@
 #include <linux/mtd/physmap.h>
 #include <linux/smsc911x.h>
 #include <linux/sh_intc.h>
+#include <linux/tca6416_keypad.h>
 #include <linux/usb/r8a66597.h>
 
 #include <video/sh_mobile_lcdc.h>
@@ -413,11 +414,44 @@ static struct platform_device *mackerel_devices[] __initdata = {
        &fsi_ak4643_device,
 };
 
+/* Keypad Initialization */
+#define KEYPAD_BUTTON(ev_type, ev_code, act_low) \
+{                                                              \
+       .type           = ev_type,                              \
+       .code           = ev_code,                              \
+       .active_low     = act_low,                              \
+}
+
+#define KEYPAD_BUTTON_LOW(event_code) KEYPAD_BUTTON(EV_KEY, event_code, 1)
+
+static struct tca6416_button mackerel_gpio_keys[] = {
+       KEYPAD_BUTTON_LOW(KEY_HOME),
+       KEYPAD_BUTTON_LOW(KEY_MENU),
+       KEYPAD_BUTTON_LOW(KEY_BACK),
+       KEYPAD_BUTTON_LOW(KEY_POWER),
+};
+
+static struct tca6416_keys_platform_data mackerel_tca6416_keys_info = {
+       .buttons        = mackerel_gpio_keys,
+       .nbuttons       = ARRAY_SIZE(mackerel_gpio_keys),
+       .rep            = 1,
+       .use_polling    = 0,
+       .pinmask        = 0x000F,
+};
+
 /* I2C */
+#define IRQ9 evt2irq(0x0320)
+
 static struct i2c_board_info i2c0_devices[] = {
        {
                I2C_BOARD_INFO("ak4643", 0x13),
        },
+       /* Keypad */
+       {
+               I2C_BOARD_INFO("tca6408-keys", 0x20),
+               .platform_data = &mackerel_tca6416_keys_info,
+               .irq = IRQ9,
+       },
 };
 
 #define IRQ21 evt2irq(0x32a0)
@@ -525,6 +559,10 @@ static void __init mackerel_init(void)
 
        intc_set_priority(IRQ_FSI, 3); /* irq priority FSI(3) > SMSC911X(2) */
 
+       /* enable Keypad */
+       gpio_request(GPIO_FN_IRQ9_42,   NULL);
+       set_irq_type(IRQ9, IRQ_TYPE_LEVEL_HIGH);
+
        /* enable Accelerometer */
        gpio_request(GPIO_FN_IRQ21,     NULL);
        set_irq_type(IRQ21, IRQ_TYPE_LEVEL_HIGH);