compulab: refactor board revision handling

Move board revision handling code to a common location
for further reuse.

Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
Reviewed-by: Tom Rini <trini@ti.com>

board/compulab/cm_t35/cm_t35.c

@@ -33,6 +33,7 @@
 #include <asm/ehci-omap.h>
 #include <asm/gpio.h>
 
+#include "../common/common.h"
 #include "../common/eeprom.h"
 
 DECLARE_GLOBAL_DATA_PTR;
@@ -154,34 +155,18 @@ 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 = cl_eeprom_get_board_rev();
-
-	return cm_t3x_rev;
+	return cl_eeprom_get_board_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);
+	cl_print_pcb_info();
 	dieid_num_r();
 
 	return 0;

board/compulab/common/Makefile

@@ -6,5 +6,6 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-obj-$(CONFIG_SYS_I2C) += eeprom.o
-obj-$(CONFIG_LCD) += omap3_display.o
+obj-y				+= common.o
+obj-$(CONFIG_SYS_I2C)		+= eeprom.o
+obj-$(CONFIG_LCD)		+= omap3_display.o

board/compulab/common/common.c

@@ -0,0 +1,25 @@
+/*
+ * (C) Copyright 2014 CompuLab, Ltd. <www.compulab.co.il>
+ *
+ * Authors: Igor Grinberg <grinberg@compulab.co.il>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/bootm.h>
+
+#include "common.h"
+#include "eeprom.h"
+
+void cl_print_pcb_info(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);
+}

board/compulab/common/common.h

@@ -0,0 +1,14 @@
+/*
+ * (C) Copyright 2014 CompuLab, Ltd. <www.compulab.co.il>
+ *
+ * Authors: Igor Grinberg <grinberg@compulab.co.il>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _CL_COMMON_
+#define _CL_COMMON_
+
+void cl_print_pcb_info(void);
+
+#endif /* _CL_COMMON_ */

board/compulab/common/eeprom.c

@@ -109,23 +109,27 @@ int cl_eeprom_read_mac_addr(uchar *buf)
 	return cl_eeprom_read(offset, buf, 6);
 }
 
+static u32 board_rev;
+
 /*
  * Routine: cl_eeprom_get_board_rev
  * Description: read system revision from eeprom
  */
 u32 cl_eeprom_get_board_rev(void)
 {
-	u32 rev = 0;
 	char str[5]; /* Legacy representation can contain at most 4 digits */
 	uint offset = BOARD_REV_OFFSET_LEGACY;
 
+	if (board_rev)
+		return board_rev;
+
 	if (cl_eeprom_setup_layout())
 		return 0;
 
 	if (cl_eeprom_layout != LAYOUT_LEGACY)
 		offset = BOARD_REV_OFFSET;
 
-	if (cl_eeprom_read(offset, (uchar *)&rev, BOARD_REV_SIZE))
+	if (cl_eeprom_read(offset, (uchar *)&board_rev, BOARD_REV_SIZE))
 		return 0;
 
 	/*
@@ -133,9 +137,9 @@ u32 cl_eeprom_get_board_rev(void)
 	 * representation. i.e. for rev 1.00: 0x100 --> 0x64
 	 */
 	if (cl_eeprom_layout == LAYOUT_LEGACY) {
-		sprintf(str, "%x", rev);
-		rev = simple_strtoul(str, NULL, 10);
+		sprintf(str, "%x", board_rev);
+		board_rev = simple_strtoul(str, NULL, 10);
 	}
 
-	return rev;
+	return board_rev;
 };