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Diffstat (limited to 'board/compulab/common/eeprom.c')
-rw-r--r--board/compulab/common/eeprom.c20
1 files changed, 13 insertions, 7 deletions
diff --git a/board/compulab/common/eeprom.c b/board/compulab/common/eeprom.c
index a45e7be11f..77bcea44b4 100644
--- a/board/compulab/common/eeprom.c
+++ b/board/compulab/common/eeprom.c
@@ -31,6 +31,7 @@
#define LAYOUT_INVALID 0
#define LAYOUT_LEGACY 0xff
+static int cl_eeprom_bus;
static int cl_eeprom_layout; /* Implicitly LAYOUT_INVALID */
static int cl_eeprom_read(uint offset, uchar *buf, int len)
@@ -38,7 +39,7 @@ static int cl_eeprom_read(uint offset, uchar *buf, int len)
int res;
unsigned int current_i2c_bus = i2c_get_bus_num();
- res = i2c_set_bus_num(CONFIG_SYS_I2C_EEPROM_BUS);
+ res = i2c_set_bus_num(cl_eeprom_bus);
if (res < 0)
return res;
@@ -50,13 +51,18 @@ static int cl_eeprom_read(uint offset, uchar *buf, int len)
return res;
}
-static int cl_eeprom_setup_layout(void)
+static int cl_eeprom_setup(uint eeprom_bus)
{
int res;
- if (cl_eeprom_layout != LAYOUT_INVALID)
+ /*
+ * We know the setup was already done when the layout is set to a valid
+ * value and we're using the same bus as before.
+ */
+ if (cl_eeprom_layout != LAYOUT_INVALID && eeprom_bus == cl_eeprom_bus)
return 0;
+ cl_eeprom_bus = eeprom_bus;
res = cl_eeprom_read(EEPROM_LAYOUT_VER_OFFSET,
(uchar *)&cl_eeprom_layout, 1);
if (res) {
@@ -77,7 +83,7 @@ void get_board_serial(struct tag_serialnr *serialnr)
memset(serialnr, 0, sizeof(*serialnr));
- if (cl_eeprom_setup_layout())
+ if (cl_eeprom_setup(CONFIG_SYS_I2C_EEPROM_BUS))
return;
offset = (cl_eeprom_layout != LAYOUT_LEGACY) ?
@@ -96,11 +102,11 @@ void get_board_serial(struct tag_serialnr *serialnr)
* Routine: cl_eeprom_read_mac_addr
* Description: read mac address and store it in buf.
*/
-int cl_eeprom_read_mac_addr(uchar *buf)
+int cl_eeprom_read_mac_addr(uchar *buf, uint eeprom_bus)
{
uint offset;
- if (cl_eeprom_setup_layout())
+ if (cl_eeprom_setup(eeprom_bus))
return 0;
offset = (cl_eeprom_layout != LAYOUT_LEGACY) ?
@@ -123,7 +129,7 @@ u32 cl_eeprom_get_board_rev(void)
if (board_rev)
return board_rev;
- if (cl_eeprom_setup_layout())
+ if (cl_eeprom_setup(CONFIG_SYS_I2C_EEPROM_BUS))
return 0;
if (cl_eeprom_layout != LAYOUT_LEGACY)