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| author | Christian Gmeiner <christian.gmeiner@gmail.com> | 2015-02-11 15:19:31 +0100 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2015-02-17 10:42:53 +0100 |
| commit | 189d257b7ad9c6c9c84941be27de8e31a6e87e86 (patch) | |
| tree | f0501e4f73e6221768c4c6ad1a1de5a989cfee17 | |
| parent | 83dd1dd91c71c75c943714ef93b5cbd8ccb7e1c9 (diff) | |
| download | u-boot-imx-189d257b7ad9c6c9c84941be27de8e31a6e87e86.zip u-boot-imx-189d257b7ad9c6c9c84941be27de8e31a6e87e86.tar.gz u-boot-imx-189d257b7ad9c6c9c84941be27de8e31a6e87e86.tar.bz2 | |
cmd_eeprom: make it possible to define the used i2c bus
A SoC like the i.MX6 supports more then one i2c bus. In oder to be
able to use the eeprom command add a new define to specify the
i2c bus to use. If CONFIG_SYS_I2C_EEPROM_BUS is not defined there
is no functional change, else a call to i2c_set_bus_num(..) is
done before calling i2c_read(..) and i2c_write(..).
Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Acked-by: Stefano Babic <sbabic@denx.de>
| -rw-r--r-- | README | 3 | ||||
| -rw-r--r-- | common/cmd_eeprom.c | 6 |
2 files changed, 9 insertions, 0 deletions
@@ -4341,6 +4341,9 @@ to save the current settings. If defined, specified the chip address of the EEPROM device. The default address is zero. + - CONFIG_SYS_I2C_EEPROM_BUS: + If defined, specified the i2c bus of the EEPROM device. + - CONFIG_SYS_EEPROM_PAGE_WRITE_BITS: If defined, the number of bits used to address bytes in a single page in the EEPROM device. A 64 byte page, for example diff --git a/common/cmd_eeprom.c b/common/cmd_eeprom.c index 29f0f1f..e9904cd 100644 --- a/common/cmd_eeprom.c +++ b/common/cmd_eeprom.c @@ -161,6 +161,9 @@ int eeprom_read (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cnt #if defined(CONFIG_SPI) && !defined(CONFIG_ENV_EEPROM_IS_ON_I2C) spi_read (addr, alen, buffer, len); #else +#if defined(CONFIG_SYS_I2C_EEPROM_BUS) + i2c_set_bus_num(CONFIG_SYS_I2C_EEPROM_BUS); +#endif if (i2c_read(addr[0], offset, alen - 1, buffer, len)) rcode = 1; #endif @@ -339,6 +342,9 @@ int eeprom_write (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cn /* Write is enabled ... now write eeprom value. */ #endif +#if defined(CONFIG_SYS_I2C_EEPROM_BUS) + i2c_set_bus_num(CONFIG_SYS_I2C_EEPROM_BUS); +#endif if (i2c_write(addr[0], offset, alen - 1, buffer, len)) rcode = 1; |