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Diffstat (limited to 'common/Kconfig')
| -rw-r--r-- | common/Kconfig | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/common/Kconfig b/common/Kconfig index 2f86e7ca90..4d8ef6640b 100644 --- a/common/Kconfig +++ b/common/Kconfig @@ -176,6 +176,67 @@ endmenu menu "Environment" +config ENV_IS_IN_EEPROM + bool "Environment in EEPROM" + depends on !CHAIN_OF_TRUST + help + Use this if you have an EEPROM or similar serial access + device and a driver for it. + + - CONFIG_ENV_OFFSET: + - CONFIG_ENV_SIZE: + + These two #defines specify the offset and size of the + environment area within the total memory of your EEPROM. + + - CONFIG_SYS_I2C_EEPROM_ADDR: + 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 + would require six bits. + + - CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS: + If defined, the number of milliseconds to delay between + page writes. The default is zero milliseconds. + + - CONFIG_SYS_I2C_EEPROM_ADDR_LEN: + The length in bytes of the EEPROM memory array address. Note + that this is NOT the chip address length! + + - CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW: + EEPROM chips that implement "address overflow" are ones + like Catalyst 24WC04/08/16 which has 9/10/11 bits of + address and the extra bits end up in the "chip address" bit + slots. This makes a 24WC08 (1Kbyte) chip look like four 256 + byte chips. + + Note that we consider the length of the address field to + still be one byte because the extra address bits are hidden + in the chip address. + + - 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 1 + + EEPROM which holds the environment, is reached over + a pca9547 i2c mux with address 0x70, channel 3. + config ENV_IS_IN_FLASH bool "Environment in flash memory" depends on !CHAIN_OF_TRUST |