arm: am57xx: cl-som-am57x: fetch board rev from EEPROM

Add PCB revision message.
Implement board revision get_board_rev API.

Signed-off-by: Dmitry Lifshitz <lifshitz@compulab.co.il>
Commit description update.
Signed-off-by: Uri Mashiach <uri.mashiach@compulab.co.il>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
Reviewed-by: Tom Rini <trini@konsulko.com>

board/compulab/cl-som-am57x/cl-som-am57x.c

@@ -14,6 +14,8 @@
 #include <asm/gpio.h>
 #include <asm/arch/mmc_host_def.h>
 #include <asm/arch/sys_proto.h>
+#include "../common/common.h"
+#include "../common/eeprom.h"
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -60,3 +62,15 @@ int board_usb_init(int index, enum usb_init_type init)
 	return 0;
 }
 #endif /* CONFIG_USB_XHCI_OMAP */
+
+int misc_init_r(void)
+{
+	cl_print_pcb_info();
+
+	return 0;
+}
+
+u32 get_board_rev(void)
+{
+	return cl_eeprom_get_board_rev(CONFIG_SYS_I2C_EEPROM_BUS);
+}

include/configs/cl-som-am57x.h

@@ -24,6 +24,10 @@
 
 #include <configs/ti_omap5_common.h>
 
+/* misc */
+#define CONFIG_MISC_INIT_R
+#define CONFIG_REVISION_TAG
+
 /* Status LED */
 #define CONFIG_STATUS_LED		/* Status LED enabled */
 #define CONFIG_GPIO_LED
@@ -65,6 +69,16 @@
 #define CONFIG_ENV_OFFSET		(768 * 1024)
 #define CONFIG_ENV_SPI_MAX_HZ		48000000
 
+/* EEPROM */
+#define CONFIG_SYS_I2C_EEPROM_ADDR      0x50
+#define CONFIG_SYS_I2C_EEPROM_ADDR_LEN  1
+#define CONFIG_SYS_I2C_EEPROM_BUS       3
+
+#define CONFIG_CMD_EEPROM
+#define CONFIG_CMD_EEPROM_LAYOUT
+#define CONFIG_ENV_EEPROM_IS_ON_I2C
+#define CONFIG_SYS_EEPROM_SIZE		256
+
 #ifndef CONFIG_SPL_BUILD
 /* SATA */
 #define CONFIG_CMD_SCSI