omap3: overo: Separate module and expansion board MUX configuration

Separate overo module and expansion board MUX configuration. This allows
an foreign expansion board to use the boot loader without any adaption.
It only needs to save the expansion name in the EEPROM to load a
specific device tree.

Signed-off-by: Stefan Herbrechtsmeier <stefan@herbrechtsmeier.net>

1 files changed, 23 insertions, 4 deletions

diff --git a/board/overo/overo.c b/board/overo/overo.c
index caffb508bd..488246bcc5 100644
--- a/board/overo/overo.c
+++ b/board/overo/overo.c
@@ -31,6 +31,8 @@ DECLARE_GLOBAL_DATA_PTR;
 #define EXPANSION_EEPROM_I2C_BUS	2
 #define EXPANSION_EEPROM_I2C_ADDRESS	0x51
 
+#define GUMSTIX_EMPTY_EEPROM		0x0
+
 #define GUMSTIX_SUMMIT			0x01000200
 #define GUMSTIX_TOBI			0x02000200
 #define GUMSTIX_TOBI_DUO		0x03000200
@@ -56,7 +58,7 @@ static struct {
 	char fab_revision[8];
 	char env_var[16];
 	char env_setting[64];
-} expansion_config;
+} expansion_config = {0x0};
 
 /*
  * Routine: board_init
@@ -198,6 +200,9 @@ int get_sdio2_config(void)
  */
 unsigned int get_expansion_id(void)
 {
+	if (expansion_config.device_vendor != 0x0)
+		return expansion_config.device_vendor;
+
 	i2c_set_bus_num(EXPANSION_EEPROM_I2C_BUS);
 
 	/* return GUMSTIX_NO_EEPROM if eeprom doesn't respond */
@@ -247,6 +252,7 @@ int misc_init_r(void)
 		printf("Recognized Summit expansion board (rev %d %s)\n",
 			expansion_config.revision,
 			expansion_config.fab_revision);
+		MUX_GUMSTIX();
 		setenv("defaultdisplay", "dvi");
 		setenv("expansionname", "summit");
 		break;
@@ -254,6 +260,7 @@ int misc_init_r(void)
 		printf("Recognized Tobi expansion board (rev %d %s)\n",
 			expansion_config.revision,
 			expansion_config.fab_revision);
+		MUX_GUMSTIX();
 		setenv("defaultdisplay", "dvi");
 		setenv("expansionname", "tobi");
 		break;
@@ -261,17 +268,20 @@ int misc_init_r(void)
 		printf("Recognized Tobi Duo expansion board (rev %d %s)\n",
 			expansion_config.revision,
 			expansion_config.fab_revision);
+		MUX_GUMSTIX();
 		break;
 	case GUMSTIX_PALO35:
 		printf("Recognized Palo35 expansion board (rev %d %s)\n",
 			expansion_config.revision,
 			expansion_config.fab_revision);
+		MUX_GUMSTIX();
 		setenv("defaultdisplay", "lcd35");
 		break;
 	case GUMSTIX_PALO43:
 		printf("Recognized Palo43 expansion board (rev %d %s)\n",
 			expansion_config.revision,
 			expansion_config.fab_revision);
+		MUX_GUMSTIX();
 		setenv("defaultdisplay", "lcd43");
 		setenv("expansionname", "palo43");
 		break;
@@ -279,6 +289,7 @@ int misc_init_r(void)
 		printf("Recognized Chestnut43 expansion board (rev %d %s)\n",
 			expansion_config.revision,
 			expansion_config.fab_revision);
+		MUX_GUMSTIX();
 		setenv("defaultdisplay", "lcd43");
 		setenv("expansionname", "chestnut43");
 		break;
@@ -286,11 +297,13 @@ int misc_init_r(void)
 		printf("Recognized Pinto expansion board (rev %d %s)\n",
 			expansion_config.revision,
 			expansion_config.fab_revision);
+		MUX_GUMSTIX();
 		break;
 	case GUMSTIX_GALLOP43:
 		printf("Recognized Gallop43 expansion board (rev %d %s)\n",
 			expansion_config.revision,
 			expansion_config.fab_revision);
+		MUX_GUMSTIX();
 		setenv("defaultdisplay", "lcd43");
 		setenv("expansionname", "gallop43");
 		break;
@@ -298,6 +311,7 @@ int misc_init_r(void)
 		printf("Recognized Alto35 expansion board (rev %d %s)\n",
 			expansion_config.revision,
 			expansion_config.fab_revision);
+		MUX_GUMSTIX();
 		MUX_ALTO35();
 		setenv("defaultdisplay", "lcd35");
 		setenv("expansionname", "alto35");
@@ -306,21 +320,25 @@ int misc_init_r(void)
 		printf("Recognized Stagecoach expansion board (rev %d %s)\n",
 			expansion_config.revision,
 			expansion_config.fab_revision);
+		MUX_GUMSTIX();
 		break;
 	case GUMSTIX_THUMBO:
 		printf("Recognized Thumbo expansion board (rev %d %s)\n",
 			expansion_config.revision,
 			expansion_config.fab_revision);
+		MUX_GUMSTIX();
 		break;
 	case GUMSTIX_TURTLECORE:
 		printf("Recognized Turtlecore expansion board (rev %d %s)\n",
 			expansion_config.revision,
 			expansion_config.fab_revision);
+		MUX_GUMSTIX();
 		break;
 	case GUMSTIX_ARBOR43C:
 		printf("Recognized Arbor43C expansion board (rev %d %s)\n",
 			expansion_config.revision,
 			expansion_config.fab_revision);
+		MUX_GUMSTIX();
 		MUX_ARBOR43C();
 		setenv("defaultdisplay", "lcd43");
 		break;
@@ -328,16 +346,17 @@ int misc_init_r(void)
 		printf("Recognized Ettus Research USRP-E (rev %d %s)\n",
 			expansion_config.revision,
 			expansion_config.fab_revision);
+		MUX_GUMSTIX();
 		MUX_USRP_E();
 		setenv("defaultdisplay", "dvi");
 		break;
 	case GUMSTIX_NO_EEPROM:
-		puts("No EEPROM on expansion board\n");
+	case GUMSTIX_EMPTY_EEPROM:
+		puts("No or empty EEPROM on expansion board\n");
+		MUX_GUMSTIX();
 		setenv("expansionname", "tobi");
 		break;
 	default:
-		if (expansion_id == 0x0)
-			setenv("expansionname", "tobi");
 		printf("Unrecognized expansion board 0x%08x\n", expansion_id);
 		break;
 	}