board: ti: am57xx: Add support for detection of reva3 variations for GPEVM

AM57xx evm Rev A3 with SR2.0 platform have incompatible changes for HDMI
GPIO requiring new dtb support. This implies we have to properly identify
the platform now as well. Hence provide a different board name for the
Rev A3 variations.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

board/ti/am57xx/board.c

@@ -36,6 +36,9 @@
 
 #define board_is_x15()		board_ti_is("BBRDX15_")
 #define board_is_am572x_evm()	board_ti_is("AM572PM_")
+#define board_is_am572x_evm_reva3()	\
+				(board_ti_is("AM572PM_") && \
+				 (strncmp("A.30", board_ti_get_rev(), 3) <= 0))
 #define board_is_am572x_idk()	board_ti_is("AM572IDK")
 
 #ifdef CONFIG_DRIVER_TI_CPSW
@@ -390,15 +393,19 @@ static void setup_board_eeprom_env(void)
 	if (rc)
 		goto invalid_eeprom;
 
-	if (board_is_x15())
+	if (board_is_x15()) {
 		name = "beagle_x15";
-	else if (board_is_am572x_evm())
-		name = "am57xx_evm";
-	else if (board_is_am572x_idk())
+	} else if (board_is_am572x_evm()) {
+		if (board_is_am572x_evm_reva3())
+			name = "am57xx_evm_reva3";
+		else
+			name = "am57xx_evm";
+	} else if (board_is_am572x_idk()) {
 		name = "am572x_idk";
-	else
+	} else {
 		printf("Unidentified board claims %s in eeprom header\n",
 		       board_ti_get_name());
+	}
 
 invalid_eeprom:
 	set_board_info_env(name);

include/configs/ti_omap5_common.h

@@ -93,6 +93,8 @@
 			"setenv fdtfile am572x-idk.dtb; fi;" \
 		"if test $board_name = am57xx_evm; then " \
 			"setenv fdtfile am57xx-beagle-x15.dtb; fi;" \
+		"if test $board_name = am57xx_evm_reva3; then " \
+			"setenv fdtfile am57xx-beagle-x15.dtb; fi;" \
 		"if test $fdtfile = undefined; then " \
 			"echo WARNING: Could not determine device tree to use; fi; \0" \
 	DFUARGS \