[U-Boot] [PATCH 4/4] cm-t35: print PCB revision information

[Igor Grinberg]

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

Buffer the PCB revision to avoid multiple eeprom accesses
for the same data and print it as a part of board information.

Signed-off-by: Nikita Kiryanov <nikita at compulab.co.il>
Signed-off-by: Igor Grinberg <grinberg at compulab.co.il>
---
 board/cm_t35/cm_t35.c |   22 ++++++++++++++++++++++
 board/cm_t35/eeprom.c |    6 +++---
 board/cm_t35/eeprom.h |    5 +++++
 3 files changed, 30 insertions(+), 3 deletions(-)

diff --git a/board/cm_t35/cm_t35.c b/board/cm_t35/cm_t35.c
index d5bc581..60e0b06 100644
--- a/board/cm_t35/cm_t35.c
+++ b/board/cm_t35/cm_t35.c
@@ -101,12 +101,34 @@ int board_init(void)
 	return 0;
 }
 
+static u32 cm_t3x_rev;
+
+/*
+ * Routine: get_board_rev
+ * Description: read system revision
+ */
+u32 get_board_rev(void)
+{
+	if (!cm_t3x_rev)
+		cm_t3x_rev = cm_t3x_eeprom_get_board_rev();
+
+	return cm_t3x_rev;
+};
+
 /*
  * Routine: misc_init_r
  * Description: display die ID
  */
 int misc_init_r(void)
 {
+	u32 board_rev = get_board_rev();
+	u32 rev_major = board_rev / 100;
+	u32 rev_minor = board_rev - (rev_major * 100);
+
+	if ((rev_minor / 10) * 10 == rev_minor)
+		rev_minor = rev_minor / 10;
+
+	printf("PCB:   %u.%u\n", rev_major, rev_minor);
 	dieid_num_r();
 
 	return 0;
diff --git a/board/cm_t35/eeprom.c b/board/cm_t35/eeprom.c
index 4986b23..b0af103 100644
--- a/board/cm_t35/eeprom.c
+++ b/board/cm_t35/eeprom.c
@@ -99,10 +99,10 @@ int cm_t3x_eeprom_read_mac_addr(uchar *buf)
 }
 
 /*
- * Routine: get_board_rev
- * Description: read system revision
+ * Routine: cm_t3x_eeprom_get_board_rev
+ * Description: read system revision from eeprom
  */
-u32 get_board_rev(void)
+u32 cm_t3x_eeprom_get_board_rev(void)
 {
 	u32 rev = 0;
 	char str[5]; /* Legacy representation can contain at most 4 digits */
diff --git a/board/cm_t35/eeprom.h b/board/cm_t35/eeprom.h
index ec772c6..38824d1 100644
--- a/board/cm_t35/eeprom.h
+++ b/board/cm_t35/eeprom.h
@@ -23,11 +23,16 @@
 
 #ifdef CONFIG_DRIVER_OMAP34XX_I2C
 int cm_t3x_eeprom_read_mac_addr(uchar *buf);
+u32 cm_t3x_eeprom_get_board_rev(void);
 #else
 static inline int cm_t3x_eeprom_read_mac_addr(uchar *buf)
 {
 	return 1;
 }
+static inline u32 cm_t3x_eeprom_get_board_rev(void)
+{
+	return 0;
+}
 #endif
 
 #endif
-- 
1.7.3.4