Merge branch 'devel-boards' into omap-for-linus

1 files changed, 99 insertions, 2 deletions

diff --git a/arch/arm/mach-omap2/board-omap3beagle.c b/arch/arm/mach-omap2/board-omap3beagle.c
index 51493f5..7e70488 100644
--- a/arch/arm/mach-omap2/board-omap3beagle.c
+++ b/arch/arm/mach-omap2/board-omap3beagle.c
@@ -51,6 +51,93 @@
 
 #define NAND_BLOCK_SIZE		SZ_128K
 
+/*
+ * OMAP3 Beagle revision
+ * Run time detection of Beagle revision is done by reading GPIO.
+ * GPIO ID -
+ *	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
+ */
+enum {
+	OMAP3BEAGLE_BOARD_UNKN = 0,
+	OMAP3BEAGLE_BOARD_AXBX,
+	OMAP3BEAGLE_BOARD_C1_3,
+	OMAP3BEAGLE_BOARD_C4,
+	OMAP3BEAGLE_BOARD_XM,
+};
+
+static u8 omap3_beagle_version;
+
+static u8 omap3_beagle_get_rev(void)
+{
+	return omap3_beagle_version;
+}
+
+static void __init omap3_beagle_init_rev(void)
+{
+	int ret;
+	u16 beagle_rev = 0;
+
+	omap_mux_init_gpio(171, OMAP_PIN_INPUT_PULLUP);
+	omap_mux_init_gpio(172, OMAP_PIN_INPUT_PULLUP);
+	omap_mux_init_gpio(173, OMAP_PIN_INPUT_PULLUP);
+
+	ret = gpio_request(171, "rev_id_0");
+	if (ret < 0)
+		goto fail0;
+
+	ret = gpio_request(172, "rev_id_1");
+	if (ret < 0)
+		goto fail1;
+
+	ret = gpio_request(173, "rev_id_2");
+	if (ret < 0)
+		goto fail2;
+
+	gpio_direction_input(171);
+	gpio_direction_input(172);
+	gpio_direction_input(173);
+
+	beagle_rev = gpio_get_value(171) | (gpio_get_value(172) << 1)
+			| (gpio_get_value(173) << 2);
+
+	switch (beagle_rev) {
+	case 7:
+		printk(KERN_INFO "OMAP3 Beagle Rev: Ax/Bx\n");
+		omap3_beagle_version = OMAP3BEAGLE_BOARD_AXBX;
+		break;
+	case 6:
+		printk(KERN_INFO "OMAP3 Beagle Rev: C1/C2/C3\n");
+		omap3_beagle_version = OMAP3BEAGLE_BOARD_C1_3;
+		break;
+	case 5:
+		printk(KERN_INFO "OMAP3 Beagle Rev: C4\n");
+		omap3_beagle_version = OMAP3BEAGLE_BOARD_C4;
+		break;
+	case 0:
+		printk(KERN_INFO "OMAP3 Beagle Rev: xM\n");
+		omap3_beagle_version = OMAP3BEAGLE_BOARD_XM;
+		break;
+	default:
+		printk(KERN_INFO "OMAP3 Beagle Rev: unknown %hd\n", beagle_rev);
+		omap3_beagle_version = OMAP3BEAGLE_BOARD_UNKN;
+	}
+
+	return;
+
+fail2:
+	gpio_free(172);
+fail1:
+	gpio_free(171);
+fail0:
+	printk(KERN_ERR "Unable to get revision detection GPIO pins\n");
+	omap3_beagle_version = OMAP3BEAGLE_BOARD_UNKN;
+
+	return;
+}
+
 static struct mtd_partition omap3beagle_nand_partitions[] = {
 	/* All the partition sizes are listed in terms of NAND block size */
 	{
@@ -186,7 +273,10 @@ static struct gpio_led gpio_leds[];
 static int beagle_twl_gpio_setup(struct device *dev,
 		unsigned gpio, unsigned ngpio)
 {
-	if (system_rev >= 0x20 && system_rev <= 0x34301000) {
+	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 {
@@ -323,13 +413,19 @@ static struct i2c_board_info __initdata beagle_i2c_boardinfo[] = {
 	},
 };
 
+static struct i2c_board_info __initdata beagle_i2c_eeprom[] = {
+       {
+               I2C_BOARD_INFO("eeprom", 0x50),
+       },
+};
+
 static int __init omap3_beagle_i2c_init(void)
 {
 	omap_register_i2c_bus(1, 2600, beagle_i2c_boardinfo,
 			ARRAY_SIZE(beagle_i2c_boardinfo));
 	/* Bus 3 is attached to the DVI port where devices like the pico DLP
 	 * projector don't work reliably with 400kHz */
-	omap_register_i2c_bus(3, 100, NULL, 0);
+	omap_register_i2c_bus(3, 100, beagle_i2c_eeprom, ARRAY_SIZE(beagle_i2c_eeprom));
 	return 0;
 }
 
@@ -465,6 +561,7 @@ static struct omap_musb_board_data musb_board_data = {
 static void __init omap3_beagle_init(void)
 {
 	omap3_mux_init(board_mux, OMAP_PACKAGE_CBB);
+	omap3_beagle_init_rev();
 	omap3_beagle_i2c_init();
 	platform_add_devices(omap3_beagle_devices,
 			ARRAY_SIZE(omap3_beagle_devices));