mfd: dm355 evm MMC/SD card detection

Support card detect and writeprotect switches on DM355 EVM.
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: NSamuel Ortiz <sameo@openedhand.com>

drivers/mfd/dm355evm_msp.c

@@ -107,6 +107,9 @@ static const u8 msp_gpios[] = {
 	MSP_GPIO(0, SWITCH1), MSP_GPIO(1, SWITCH1),
 	MSP_GPIO(2, SWITCH1), MSP_GPIO(3, SWITCH1),
 	MSP_GPIO(4, SWITCH1),
+	/* switches on MMC/SD sockets */
+	MSP_GPIO(1, SDMMC), MSP_GPIO(2, SDMMC),	/* mmc0 WP, nCD */
+	MSP_GPIO(3, SDMMC), MSP_GPIO(4, SDMMC),	/* mmc1 WP, nCD */
 };
 
 #define MSP_GPIO_REG(offset)	(msp_gpios[(offset)] >> 3)
@@ -304,6 +307,13 @@ static int add_children(struct i2c_client *client)
 		gpio_export(gpio, false);
 	}
 
+	/* MMC/SD inputs -- right after the last config input */
+	if (client->dev.platform_data) {
+		void (*mmcsd_setup)(unsigned) = client->dev.platform_data;
+
+		mmcsd_setup(dm355evm_msp_gpio.base + 8 + 5);
+	}
+
 	/* RTC is a 32 bit counter, no alarm */
 	if (msp_has_rtc()) {
 		child = add_child(client, "rtc-dm355evm",