[U-Boot] [PATCH 4/4] mx53loco: Add CONFIG_REVISION_TAG

[Fabio Estevam <festevam@gmail.com>]

From: Fabio Estevam <fabio.estevam@freescale.com>

FSL 2.6.35 kernel assumes that the bootloader passes the CONFIG_REVISION_TAG information.

The kernel uses this data to distinguish between Dialog versus mc34708 based boards,
and also to distinguish between revA and revB of the mc34708 based boards.

Suggested-by: Yu Li <yk@magniel.com>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
---
 board/freescale/mx53loco/mx53loco.c |    7 +++++++
 include/configs/mx53loco.h          |    1 +
 2 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/board/freescale/mx53loco/mx53loco.c b/board/freescale/mx53loco/mx53loco.c
index 4d3b73d..2f2c00c 100644
--- a/board/freescale/mx53loco/mx53loco.c
+++ b/board/freescale/mx53loco/mx53loco.c
@@ -62,6 +62,13 @@ void dram_init_banksize(void)
 	gd->bd->bi_dram[1].size = PHYS_SDRAM_2_SIZE;
 }
 
+u32 get_board_rev(void)
+{
+	/* TODO: Convert the register to proper io accessor */
+	int rev = readl(IIM_BASE_ADDR + 0x878);
+	return (get_cpu_rev() & ~(0xF << 8)) | (rev & 0xF) << 8;
+}
+
 static void setup_iomux_uart(void)
 {
 	/* UART1 RXD */
diff --git a/include/configs/mx53loco.h b/include/configs/mx53loco.h
index 87f6ed1..eab0e27 100644
--- a/include/configs/mx53loco.h
+++ b/include/configs/mx53loco.h
@@ -43,6 +43,7 @@
 #define CONFIG_BOARD_EARLY_INIT_F
 #define CONFIG_BOARD_LATE_INIT
 #define CONFIG_MXC_GPIO
+#define CONFIG_REVISION_TAG
 
 #define CONFIG_MXC_UART
 #define CONFIG_MXC_UART_BASE	UART1_BASE
-- 
1.7.1