[PATCH v4] armv8: ls1046afrwy: Fix get_board_version implementation

[Pramod Kumar]

Current implementation to get board version through GPIO is
brocken due to endianness issue hence it is not working for rev B
board.
Fix it to make it work for Rev A as well as Rev B boards

Signed-off-by: Pramod Kumar <pramod.kumar_1 at nxp.com>
---
Changes in v4:
  - updated commit message

Changes in v3:
  - incorporate review comment

Changes in v2:
  - incorporate review comments

 board/freescale/ls1046afrwy/ls1046afrwy.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/board/freescale/ls1046afrwy/ls1046afrwy.c b/board/freescale/ls1046afrwy/ls1046afrwy.c
index ac2f8ee..db8b3a5 100644
--- a/board/freescale/ls1046afrwy/ls1046afrwy.c
+++ b/board/freescale/ls1046afrwy/ls1046afrwy.c
@@ -24,7 +24,8 @@
 #define LS1046A_PORSR1_REG 0x1EE0000
 #define BOOT_SRC_SD        0x20000000
 #define BOOT_SRC_MASK	   0xFF800000
-#define BOARD_REV_GPIO		13
+#define BOARD_REV_GPIO_SHIFT	17
+#define BOARD_REV_MASK     0x03
 #define USB2_SEL_MASK	   0x00000100
 
 #define BYTE_SWAP_32(word)  ((((word) & 0xff000000) >> 24) |  \
@@ -87,10 +88,14 @@ int board_early_init_f(void)
 
 static inline uint8_t get_board_version(void)
 {
-	u8 val;
 	struct ccsr_gpio *pgpio = (void *)(GPIO2_BASE_ADDR);
 
-	val = (in_le32(&pgpio->gpdat) >> BOARD_REV_GPIO) & 0x03;
+	/* GPIO 13 and GPIO 14 are used for Board Rev */
+	u32 gpio_val = ((in_be32(&pgpio->gpdat) >> BOARD_REV_GPIO_SHIFT))
+				& BOARD_REV_MASK;
+
+	/* GPIOs' are 0..31 in Big Endiness, swap GPIO 13 and GPIO 14 */
+	u8 val = ((gpio_val >> 1) | (gpio_val << 1)) & BOARD_REV_MASK;
 
 	return val;
 }
-- 
2.7.4