cmd_eeprom: I2C updates

[people/ms/u-boot.git] / README

diff --git a/README b/README
index 22e35c39bc4deaa553aa3eb226caef51c7ab2da8..7affe10fb2a781686b64b537c62e66ab69e50e77 100644 (file)
--- a/README
+++ b/README
@@ -2447,6 +2447,19 @@ to save the current settings.
        - CONFIG_SYS_EEPROM_SIZE:
          The size in bytes of the EEPROM device.
 
+       - CONFIG_ENV_EEPROM_IS_ON_I2C
+         define this, if you have I2C and SPI activated, and your
+         EEPROM, which holds the environment, is on the I2C bus.
+
+       - CONFIG_I2C_ENV_EEPROM_BUS
+         if you have an Environment on an EEPROM reached over
+         I2C muxes, you can define here, how to reach this
+         EEPROM. For example:
+
+         #define CONFIG_I2C_ENV_EEPROM_BUS       "pca9547:70:d\0"
+
+         EEPROM which holds the environment, is reached over
+         a pca9547 i2c mux with address 0x70, channel 3.
 
 - CONFIG_ENV_IS_IN_DATAFLASH: