OMAP3: beagle: add support for beagleboard xM revision C

OMAP3: beagle: add support for beagleboard xM revision C

The USB enable GPIO has been in beagleboard xM revision C.
The USER button has been moved since beagleboard xM.
Also, board specific initialization has been moved to beagle_config struct
and initialized in omap3_beagle_init_rev. Default values in struct are for xMC.

Signed-off-by: Joel A Fernandes <joelagnel@ti.com>
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
Acked-by: Jason Kridner <jkridner@beagleboard.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/board-omap3beagle.c

@@ -60,7 +60,8 @@
  *	AXBX	= GPIO173, GPIO172, GPIO171: 1 1 1
  *	C1_3	= GPIO173, GPIO172, GPIO171: 1 1 0
  *	C4	= GPIO173, GPIO172, GPIO171: 1 0 1
- *	XM	= GPIO173, GPIO172, GPIO171: 0 0 0
+ *	XMA/XMB = GPIO173, GPIO172, GPIO171: 0 0 0
+ *	XMC = GPIO173, GPIO172, GPIO171: 0 1 0
  */
 enum {
 	OMAP3BEAGLE_BOARD_UNKN = 0,
@@ -68,14 +69,26 @@ enum {
 	OMAP3BEAGLE_BOARD_C1_3,
 	OMAP3BEAGLE_BOARD_C4,
 	OMAP3BEAGLE_BOARD_XM,
+	OMAP3BEAGLE_BOARD_XMC,
 };
 
 static u8 omap3_beagle_version;
 
-static u8 omap3_beagle_get_rev(void)
-{
-	return omap3_beagle_version;
-}
+/*
+ * Board-specific configuration
+ * Defaults to BeagleBoard-xMC
+ */
+static struct {
+	int mmc1_gpio_wp;
+	int usb_pwr_level;
+	int reset_gpio;
+	int usr_button_gpio;
+} beagle_config = {
+	.mmc1_gpio_wp = -EINVAL,
+	.usb_pwr_level = GPIOF_OUT_INIT_LOW,
+	.reset_gpio = 129,
+	.usr_button_gpio = 4,
+};
 
 static struct gpio omap3_beagle_rev_gpios[] __initdata = {
 	{ 171, GPIOF_IN, "rev_id_0"    },
@@ -110,18 +123,32 @@ static void __init omap3_beagle_init_rev(void)
 	case 7:
 		printk(KERN_INFO "OMAP3 Beagle Rev: Ax/Bx\n");
 		omap3_beagle_version = OMAP3BEAGLE_BOARD_AXBX;
+		beagle_config.mmc1_gpio_wp = 29;
+		beagle_config.reset_gpio = 170;
+		beagle_config.usr_button_gpio = 7;
 		break;
 	case 6:
 		printk(KERN_INFO "OMAP3 Beagle Rev: C1/C2/C3\n");
 		omap3_beagle_version = OMAP3BEAGLE_BOARD_C1_3;
+		beagle_config.mmc1_gpio_wp = 23;
+		beagle_config.reset_gpio = 170;
+		beagle_config.usr_button_gpio = 7;
 		break;
 	case 5:
 		printk(KERN_INFO "OMAP3 Beagle Rev: C4\n");
 		omap3_beagle_version = OMAP3BEAGLE_BOARD_C4;
+		beagle_config.mmc1_gpio_wp = 23;
+		beagle_config.reset_gpio = 170;
+		beagle_config.usr_button_gpio = 7;
 		break;
 	case 0:
-		printk(KERN_INFO "OMAP3 Beagle Rev: xM\n");
+		printk(KERN_INFO "OMAP3 Beagle Rev: xM Ax/Bx\n");
 		omap3_beagle_version = OMAP3BEAGLE_BOARD_XM;
+		beagle_config.usb_pwr_level = GPIOF_OUT_INIT_HIGH;
+		break;
+	case 2:
+		printk(KERN_INFO "OMAP3 Beagle Rev: xM C\n");
+		omap3_beagle_version = OMAP3BEAGLE_BOARD_XMC;
 		break;
 	default:
 		printk(KERN_INFO "OMAP3 Beagle Rev: unknown %hd\n", beagle_rev);
@@ -234,7 +261,7 @@ static struct omap2_hsmmc_info mmc[] = {
 	{
 		.mmc		= 1,
 		.caps		= MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA,
-		.gpio_wp	= 29,
+		.gpio_wp	= -EINVAL,
 	},
 	{}	/* Terminator */
 };
@@ -252,17 +279,11 @@ static struct gpio_led gpio_leds[];
 static int beagle_twl_gpio_setup(struct device *dev,
 		unsigned gpio, unsigned ngpio)
 {
-	int r, usb_pwr_level;
-
-	if (omap3_beagle_get_rev() == OMAP3BEAGLE_BOARD_XM) {
-		mmc[0].gpio_wp = -EINVAL;
-	} else if ((omap3_beagle_get_rev() == OMAP3BEAGLE_BOARD_C1_3) ||
-		(omap3_beagle_get_rev() == OMAP3BEAGLE_BOARD_C4)) {
-		omap_mux_init_gpio(23, OMAP_PIN_INPUT);
-		mmc[0].gpio_wp = 23;
-	} else {
-		omap_mux_init_gpio(29, OMAP_PIN_INPUT);
-	}
+	int r;
+
+	if (beagle_config.mmc1_gpio_wp != -EINVAL)
+		omap_mux_init_gpio(beagle_config.mmc1_gpio_wp, OMAP_PIN_INPUT);
+	mmc[0].gpio_wp = beagle_config.mmc1_gpio_wp;
 	/* gpio + 0 is "mmc0_cd" (input/IRQ) */
 	mmc[0].gpio_cd = gpio + 0;
 	omap2_hsmmc_init(mmc);
@@ -272,9 +293,8 @@ static int beagle_twl_gpio_setup(struct device *dev,
 	 * high / others active low)
 	 * DVI reset GPIO is different between beagle revisions
 	 */
-	if (omap3_beagle_get_rev() == OMAP3BEAGLE_BOARD_XM) {
-		usb_pwr_level = GPIOF_OUT_INIT_HIGH;
-		beagle_dvi_device.reset_gpio = 129;
+	/* Valid for all -xM revisions */
+	if (cpu_is_omap3630()) {
 		/*
 		 * gpio + 1 on Xm controls the TFP410's enable line (active low)
 		 * gpio + 2 control varies depending on the board rev as below:
@@ -292,8 +312,6 @@ static int beagle_twl_gpio_setup(struct device *dev,
 			pr_err("%s: unable to configure DVI_LDO_EN\n",
 				__func__);
 	} else {
-		usb_pwr_level = GPIOF_OUT_INIT_LOW;
-		beagle_dvi_device.reset_gpio = 170;
 		/*
 		 * REVISIT: need ehci-omap hooks for external VBUS
 		 * power switch and overcurrent detect
@@ -301,8 +319,10 @@ static int beagle_twl_gpio_setup(struct device *dev,
 		if (gpio_request_one(gpio + 1, GPIOF_IN, "EHCI_nOC"))
 			pr_err("%s: unable to configure EHCI_nOC\n", __func__);
 	}
+	beagle_dvi_device.reset_gpio = beagle_config.reset_gpio;
 
-	gpio_request_one(gpio + TWL4030_GPIO_MAX, usb_pwr_level, "nEN_USB_PWR");
+	gpio_request_one(gpio + TWL4030_GPIO_MAX, beagle_config.usb_pwr_level,
+			"nEN_USB_PWR");
 
 	/* TWL4030_GPIO_MAX + 1 == ledB, PMU_STAT (out, active low LED) */
 	gpio_leds[2].gpio = gpio + TWL4030_GPIO_MAX + 1;
@@ -454,7 +474,8 @@ static struct platform_device leds_gpio = {
 static struct gpio_keys_button gpio_buttons[] = {
 	{
 		.code			= BTN_EXTRA,
-		.gpio			= 7,
+		/* Dynamically assigned depending on board */
+		.gpio			= -EINVAL,
 		.desc			= "user",
 		.wakeup			= 1,
 	},
@@ -518,8 +539,8 @@ static void __init beagle_opp_init(void)
 		return;
 	}
 
-	/* Custom OPP enabled for XM */
-	if (omap3_beagle_get_rev() == OMAP3BEAGLE_BOARD_XM) {
+	/* Custom OPP enabled for all xM versions */
+	if (cpu_is_omap3630()) {
 		struct omap_hwmod *mh = omap_hwmod_lookup("mpu");
 		struct omap_hwmod *dh = omap_hwmod_lookup("iva");
 		struct device *dev;
@@ -559,6 +580,9 @@ static void __init omap3_beagle_init(void)
 	omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
 	omap3_beagle_init_rev();
 	omap3_beagle_i2c_init();
+
+	gpio_buttons[0].gpio = beagle_config.usr_button_gpio;
+
 	platform_add_devices(omap3_beagle_devices,
 			ARRAY_SIZE(omap3_beagle_devices));
 	omap_display_init(&beagle_dss_data);