dm646x: pass board revision info to kernel

add a function in board file to pass board revision
info to kernel. Revision number 0 and 1 are passed in
case of DM6467 and DM6467T respectively.

Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

board/davinci/dm6467evm/dm6467evm.c

@@ -24,6 +24,26 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#define REV_DM6467EVM		0
+#define REV_DM6467TEVM		1
+/*
+ * get_board_rev() - setup to pass kernel board revision information
+ * Returns:
+ * bit[0-3]	System clock frequency
+ * 0000b	- 27 MHz
+ * 0001b	- 33 MHz
+ */
+u32 get_board_rev(void)
+{
+
+#ifdef DAVINCI_DM6467TEVM
+	return REV_DM6467TEVM;
+#else
+	return REV_DM6467EVM;
+#endif
+
+}
+
 int board_init(void)
 {
 	gd->bd->bi_arch_number = MACH_TYPE_DAVINCI_DM6467_EVM;

include/configs/davinci_dm6467Tevm.h

@@ -22,6 +22,7 @@
 
 /* Spectrum Digital TMS320DM6467T EVM board */
 #define DAVINCI_DM6467EVM
+#define DAVINCI_DM6467TEVM
 #define CONFIG_SYS_USE_NAND
 #define CONFIG_SYS_NAND_SMALLPAGE
 
@@ -64,6 +65,7 @@ extern unsigned int davinci_arm_clk_get(void);
 #define CONFIG_SETUP_MEMORY_TAGS
 #define CONFIG_SYS_BARGSIZE		1024		/* Bootarg Size */
 #define CONFIG_SYS_LOAD_ADDR		0x80700000	/* kernel address */
+#define CONFIG_REVISION_TAG
 
 /* Serial Driver info */
 #define CONFIG_SYS_NS16550

include/configs/davinci_dm6467evm.h

@@ -65,6 +65,7 @@ extern unsigned int davinci_arm_clk_get(void);
 #define CONFIG_SETUP_MEMORY_TAGS
 #define CONFIG_SYS_BARGSIZE		1024		/* Bootarg Size */
 #define CONFIG_SYS_LOAD_ADDR		0x80700000	/* kernel address */
+#define CONFIG_REVISION_TAG
 
 /* Serial Driver info */
 #define CONFIG_SYS_NS16550