ARM: mach-mxs/mx28evk: Only register devices if their GPIO requests succeeded

Currently framebuffer and MMC devices are registered even if their associated
GPIO pins fail to be requested.

Change the logic so that the registration of such devices only occurs if their
GPIO requests succeeded.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arch/arm/mach-mxs/mach-mx28evk.c

@@ -351,6 +351,11 @@ static struct mxs_mmc_platform_data mx28evk_mmc_pdata[] __initdata = {
 	},
 };
 
+static struct gpio mx28evk_lcd_gpios[] = {
+	{ MX28EVK_LCD_ENABLE, GPIOF_OUT_INIT_HIGH, "lcd-enable" },
+	{ MX28EVK_BL_ENABLE, GPIOF_OUT_INIT_HIGH, "bl-enable" },
+};
+
 static void __init mx28evk_init(void)
 {
 	int ret;
@@ -377,19 +382,12 @@ static void __init mx28evk_init(void)
 		mx28_add_flexcan(1, &mx28evk_flexcan_pdata[1]);
 	}
 
-	ret = gpio_request_one(MX28EVK_LCD_ENABLE, GPIOF_DIR_OUT, "lcd-enable");
+	ret = gpio_request_array(mx28evk_lcd_gpios,
+				 ARRAY_SIZE(mx28evk_lcd_gpios));
 	if (ret)
-		pr_warn("failed to request gpio lcd-enable: %d\n", ret);
+		pr_warn("failed to request gpio pins for lcd: %d\n", ret);
 	else
-		gpio_set_value(MX28EVK_LCD_ENABLE, 1);
-
-	ret = gpio_request_one(MX28EVK_BL_ENABLE, GPIOF_DIR_OUT, "bl-enable");
-	if (ret)
-		pr_warn("failed to request gpio bl-enable: %d\n", ret);
-	else
-		gpio_set_value(MX28EVK_BL_ENABLE, 1);
-
-	mx28_add_mxsfb(&mx28evk_mxsfb_pdata);
+		mx28_add_mxsfb(&mx28evk_mxsfb_pdata);
 
 	/* power on mmc slot by writing 0 to the gpio */
 	ret = gpio_request_one(MX28EVK_MMC0_SLOT_POWER, GPIOF_OUT_INIT_LOW,
@@ -402,7 +400,8 @@ static void __init mx28evk_init(void)
 			       "mmc1-slot-power");
 	if (ret)
 		pr_warn("failed to request gpio mmc1-slot-power: %d\n", ret);
-	mx28_add_mxs_mmc(1, &mx28evk_mmc_pdata[1]);
+	else
+		mx28_add_mxs_mmc(1, &mx28evk_mmc_pdata[1]);
 
 	gpio_led_register_device(0, &mx28evk_led_data);
 }