ti: AM43xx: board: Detect AM43xx HS EVM

Adds code to detect AM43xx HS EVMS - the string in the
I2C EEPROM for HS EVMs differs from GP EVMs. Adds code to
for evm detection, regardless of whether the evm is for
GP or HS parts, and updates board init to use that.

Modifies findfdt command to pick up am437x-gp-evm.dtb for
the HS EVMs also, as the boards are similar except for
some security specific changes around power supply and
enclosure protection.

Signed-off-by: Madan Srinivas <madans@ti.com>
Signed-off-by: Daniel Allred <d-allred@ti.com>
Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>

Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

board/ti/am43xx/board.c

@@ -341,7 +341,7 @@ const struct dpll_params *get_dpll_ddr_params(void)
 
 	if (board_is_eposevm())
 		return &epos_evm_dpll_ddr[ind];
-	else if (board_is_gpevm() || board_is_sk())
+	else if (board_is_evm() || board_is_sk())
 		return &gp_evm_dpll_ddr;
 	else if (board_is_idk())
 		return &idk_dpll_ddr;
@@ -553,7 +553,7 @@ void sdram_init(void)
 		enable_vtt_regulator();
 		config_ddr(0, &ioregs_ddr3, NULL, NULL,
 			   &ddr3_emif_regs_400Mhz_beta, 0);
-	} else if (board_is_gpevm()) {
+	} else if (board_is_evm()) {
 		enable_vtt_regulator();
 		config_ddr(0, &ioregs_ddr3, NULL, NULL,
 			   &ddr3_emif_regs_400Mhz, 0);

board/ti/am43xx/board.h

@@ -37,14 +37,24 @@ static inline int board_is_idk(void)
 	return board_ti_is("AM43_IDK");
 }
 
+static inline int board_is_hsevm(void)
+{
+	return board_ti_is("AM43XXHS");
+}
+
+static inline int board_is_evm(void)
+{
+	return board_is_gpevm() || board_is_hsevm();
+}
+
 static inline int board_is_evm_14_or_later(void)
 {
-	return (board_is_gpevm() && strncmp("1.4", board_ti_get_rev(), 3) <= 0);
+	return board_is_evm() && strncmp("1.4", board_ti_get_rev(), 3) <= 0;
 }
 
 static inline int board_is_evm_12_or_later(void)
 {
-	return (board_is_gpevm() && strncmp("1.2", board_ti_get_rev(), 3) <= 0);
+	return board_is_evm() && strncmp("1.2", board_ti_get_rev(), 3) <= 0;
 }
 
 void enable_uart0_pin_mux(void);

board/ti/am43xx/mux.c

@@ -126,7 +126,7 @@ void enable_board_pin_mux(void)
 	configure_module_pin_mux(i2c0_pin_mux);
 	configure_module_pin_mux(mdio_pin_mux);
 
-	if (board_is_gpevm()) {
+	if (board_is_evm()) {
 		configure_module_pin_mux(gpio5_7_pin_mux);
 		configure_module_pin_mux(rgmii1_pin_mux);
 #if defined(CONFIG_NAND)

include/configs/am43xx_evm.h

@@ -289,6 +289,8 @@
 			"setenv fdtfile am43x-epos-evm.dtb; fi; " \
 		"if test $board_name = AM43__GP; then " \
 			"setenv fdtfile am437x-gp-evm.dtb; fi; " \
+		"if test $board_name = AM43XXHS; then " \
+			"setenv fdtfile am437x-gp-evm.dtb; fi; " \
 		"if test $board_name = AM43__SK; then " \
 			"setenv fdtfile am437x-sk-evm.dtb; fi; " \
 		"if test $board_name = AM43_IDK; then " \