[U-Boot] [PATCH 5/6] cm-t35: pass correct revision information to Linux

[Igor Grinberg]

From: Nikita Kiryanov <nikita at compulab.co.il>

Read revision from EEPROM and pass it to Linux.

Signed-off-by: Nikita Kiryanov <nikita at compulab.co.il>
Signed-off-by: Igor Grinberg <grinberg at compulab.co.il>
---
 board/cm_t35/eeprom.c |   28 ++++++++++++++++++++++++++++
 1 files changed, 28 insertions(+), 0 deletions(-)

diff --git a/board/cm_t35/eeprom.c b/board/cm_t35/eeprom.c
index 3bd7751..8386d18 100644
--- a/board/cm_t35/eeprom.c
+++ b/board/cm_t35/eeprom.c
@@ -27,6 +27,10 @@
 #define EEPROM_LAYOUT_VER_OFFSET	44
 #define BOARD_SERIAL_OFFSET		20
 #define BOARD_SERIAL_OFFSET_LEGACY	8
+#define BOARD_REV_OFFSET		0
+#define BOARD_REV_OFFSET_LEGACY		6
+#define BOARD_REV_SIZE			4
+#define BOARD_REV_SIZE_LEGACY		2
 
 #define LAYOUT_INVALID	0
 #define LAYOUT_LEGACY	0xff
@@ -77,3 +81,27 @@ void get_board_serial(struct tag_serialnr *serialnr)
 		serialnr->high = serial[1];
 	}
 }
+
+/*
+ * Routine: get_board_rev
+ * Description: read system revision
+ */
+u32 get_board_rev(void)
+{
+	u32 rev = 0;
+	uint offset = BOARD_REV_OFFSET_LEGACY;
+	int len = BOARD_REV_SIZE_LEGACY;
+
+	if (eeprom_setup_layout())
+		return 0;
+
+	if (eeprom_layout != LAYOUT_LEGACY) {
+		offset = BOARD_REV_OFFSET;
+		len = BOARD_REV_SIZE;
+	}
+
+	if (cm_t3x_eeprom_read(offset, (uchar *)&rev, len))
+		return 0;
+
+	return rev;
+};
-- 
1.7.3.4