omap3evm: Add board revision function

Added function to differentiate between the OMAP3EVM revisions. The
chip-id of the ethernet PHY is being used for this purpose.

Rev A to D : 0x01150000
Rev >= E   : 0x92200000

Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Signed-off-by: Sanjeev Premi <premi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/arch/arm/plat-omap/include/plat/board.h b/arch/arm/plat-omap/include/plat/board.h
index c4fc69f09796..abb17b604f82 100644
--- a/arch/arm/plat-omap/include/plat/board.h
+++ b/arch/arm/plat-omap/include/plat/board.h
@@ -14,6 +14,18 @@
 
 #include <plat/gpio-switch.h>
 
+/*
+ * OMAP35x EVM revision
+ * Run time detection of EVM revision is done by reading Ethernet
+ * PHY ID -
+ *      GEN_1   = 0x01150000
+ *      GEN_2   = 0x92200000
+ */
+enum {
+        OMAP3EVM_BOARD_GEN_1 = 0,       /* EVM Rev between  A - D */
+        OMAP3EVM_BOARD_GEN_2,           /* EVM Rev >= Rev E */
+};
+
 /* Different peripheral ids */
 #define OMAP_TAG_CLOCK          0x4f01
 #define OMAP_TAG_LCD            0x4f05
@@ -157,4 +169,10 @@ extern int omap_board_config_size;
 /* for TI reference platforms sharing the same debug card */
 extern int debug_card_init(u32 addr, unsigned gpio);
 
+/* OMAP3EVM revision */
+#if defined(CONFIG_MACH_OMAP3EVM)
+u8 get_omap3_evm_rev(void);
+#else
+#define get_omap3_evm_rev() (-EINVAL)
+#endif
 #endif