[U-Boot] [PATCH 05/18] compulab: eeprom: add support for defining eeprom i2c bus

Nikita Kiryanov
2014-08-03T07:34:35Z

Create CONFIG_SYS_I2C_EEPROM_BUS #define to tell the EEPROM
module what I2C bus the EEPROM is located at. Make cl_eeprom_read()
switch to that bus when reading EEPROM.

Cc: Igor Grinberg <grinberg@compulab.co.il>
Cc: Dmitry Lifshitz <lifshitz@compulab.co.il>
Cc: Tom Rini <trini@ti.com>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
Acked-by: Dmitry Lifshitz <lifshitz@compulab.co.il>
Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
---
board/compulab/common/eeprom.c | 10 +++++++++-
include/configs/cm_t335.h | 1 +
include/configs/cm_t35.h | 1 +
include/configs/cm_t54.h | 1 +
4 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/board/compulab/common/eeprom.c b/board/compulab/common/eeprom.c
index 20fe3e1..b5c1c2a 100644
--- a/board/compulab/common/eeprom.c
+++ b/board/compulab/common/eeprom.c
@@ -31,8 +31,16 @@ static int cl_eeprom_layout; /* Implicitly LAYOUT_INVALID */

static int cl_eeprom_read(uint offset, uchar *buf, int len)
{
- return i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, offset,
+ int res;
+ unsigned int current_i2c_bus = i2c_get_bus_num();
+
+ i2c_set_bus_num(CONFIG_SYS_I2C_EEPROM_BUS);
+ res = i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, offset,
CONFIG_SYS_I2C_EEPROM_ADDR_LEN, buf, len);
+
+ i2c_set_bus_num(current_i2c_bus);
+
+ return res;
}

static int cl_eeprom_setup_layout(void)
diff --git a/include/configs/cm_t335.h b/include/configs/cm_t335.h
index a3e6452..767ef3a 100644
--- a/include/configs/cm_t335.h
+++ b/include/configs/cm_t335.h
@@ -107,6 +107,7 @@
/* I2C Configuration */
#define CONFIG_SYS_I2C_EEPROM_ADDR 0x50 /* Main EEPROM */
#define CONFIG_SYS_I2C_EEPROM_ADDR_LEN 1
+#define CONFIG_SYS_I2C_EEPROM_BUS 0

/* SPL */
#define CONFIG_SPL_LDSCRIPT "$(CPUDIR)/am33xx/u-boot-spl.lds"
diff --git a/include/configs/cm_t35.h b/include/configs/cm_t35.h
index d8d71a9..b5702e3 100644
--- a/include/configs/cm_t35.h
+++ b/include/configs/cm_t35.h
@@ -136,6 +136,7 @@
#define CONFIG_SYS_I2C_OMAP34XX
#define CONFIG_SYS_I2C_EEPROM_ADDR 0x50
#define CONFIG_SYS_I2C_EEPROM_ADDR_LEN 1
+#define CONFIG_SYS_I2C_EEPROM_BUS 0
#define CONFIG_I2C_MULTI_BUS

/*
diff --git a/include/configs/cm_t54.h b/include/configs/cm_t54.h
index db04095..aa97823 100644
--- a/include/configs/cm_t54.h
+++ b/include/configs/cm_t54.h
@@ -27,6 +27,7 @@
#define CONFIG_SYS_I2C_OMAP34XX
#define CONFIG_SYS_I2C_EEPROM_ADDR 0x50
#define CONFIG_SYS_I2C_EEPROM_ADDR_LEN 1
+#define CONFIG_SYS_I2C_EEPROM_BUS 0

/* Enable SD/MMC CD and WP GPIOs */
#define OMAP_HSMMC_USE_GPIO
--
1.9.1