[U-Boot] [PATCH] omap3evm: Fix mechanism to identify board revision

[Sanjeev Premi]

Function omap3_evm_get_revision() - to identify the
board revision was called at end of setup_net_chip().

Board revision can be ascertained only by identifying
the Ethernet chipset - but combining setup operations
with revision detection isn't a good idea. So, moved
the function after call to setup_net_chip().

Function setup_net_chip() should be ideally be called
only when CONFIG_CMD_NET is defined. But this leaves
the board revision "undetected". This patch allows
static definition of revision or default fallback to
the latest revision.

Signed-off-by: Sanjeev Premi <premi at ti.com>
---
 board/ti/evm/evm.c          |   22 +++++++++++++++++++---
 board/ti/evm/evm.h          |    2 ++
 include/configs/omap3_evm.h |    5 +++++
 3 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/board/ti/evm/evm.c b/board/ti/evm/evm.c
index 73330db..09d14f7 100644
--- a/board/ti/evm/evm.c
+++ b/board/ti/evm/evm.c
@@ -46,6 +46,11 @@ u8 get_omap3_evm_rev(void)
 
 static void omap3_evm_get_revision(void)
 {
+#if defined(CONFIG_CMD_NET)
+	/*
+	 * Board revision can be ascertained only by identifying
+	 * the Ethernet chipset.
+	 */
 	unsigned int smsc_id;
 
 	/* Ethernet PHY ID is stored at ID_REV register */
@@ -62,6 +67,19 @@ static void omap3_evm_get_revision(void)
 	default:
 		omap3_evm_version = OMAP3EVM_BOARD_GEN_2;
        }
+#else
+#if defined(CONFIG_STATIC_BOARD_REV)
+	/*
+	 * Look for static defintion of the board revision
+	 */
+	omap3_evm_version = CONFIG_STATIC_BOARD_REV;
+#else
+	/*
+	 * Fallback to the default above.
+	 */
+	omap3_evm_version = OMAP3EVM_BOARD_GEN_2;
+#endif
+#endif	/* CONFIG_CMD_NET */
 }
 
 #ifdef CONFIG_USB_OMAP3
@@ -110,6 +128,7 @@ int misc_init_r(void)
 #if defined(CONFIG_CMD_NET)
 	setup_net_chip();
 #endif
+	omap3_evm_get_revision();
 
 	dieid_num_r();
 
@@ -163,9 +182,6 @@ static void setup_net_chip(void)
 	writel(GPIO0, &gpio3_base->cleardataout);
 	udelay(1);
 	writel(GPIO0, &gpio3_base->setdataout);
-
-	/* determine omap3evm revision */
-	omap3_evm_get_revision();
 }
 
 int board_eth_init(bd_t *bis)
diff --git a/board/ti/evm/evm.h b/board/ti/evm/evm.h
index e2581f6..a76deb8 100644
--- a/board/ti/evm/evm.h
+++ b/board/ti/evm/evm.h
@@ -47,7 +47,9 @@ enum {
 
 u8 get_omap3_evm_rev(void);
 
+#if defined(CONFIG_CMD_NET)
 static void setup_net_chip(void);
+#endif
 
 /*
  * IEN  - Input Enable
diff --git a/include/configs/omap3_evm.h b/include/configs/omap3_evm.h
index cd38698..271c985 100644
--- a/include/configs/omap3_evm.h
+++ b/include/configs/omap3_evm.h
@@ -351,6 +351,11 @@ extern unsigned int boot_flash_type;
 #define CONFIG_SYS_SDRAM_BASE		PHYS_SDRAM_1
 #define CONFIG_SYS_INIT_SP_ADDR		(LOW_LEVEL_SRAM_STACK - CONFIG_SYS_GBL_DATA_SIZE)
 
+/*
+ * Define the board revision statically
+ */
+/* #define CONFIG_STATIC_BOARD_REV	OMAP3EVM_BOARD_GEN_2 */
+
 /*----------------------------------------------------------------------------
  * SMSC9115 Ethernet from SMSC9118 family
  *----------------------------------------------------------------------------
-- 
1.7.2.2