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beagle: expansion boards: retry i2c_read with 16bit addressing

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Some expansion boards now ship with at24 eeproms that need to communicate
via 16bit addressing.

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
This commit is contained in:
robertcnelson@gmail.com 2013-02-04 06:03:10 +00:00 committed by Tom Rini
parent b9f56698c7
commit ff229ecf8b
1 changed files with 8 additions and 0 deletions
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8
board/ti/beagle/beagle.c
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@ -227,6 +227,14 @@ static unsigned int get_expansion_id(void)
i2c_read(EXPANSION_EEPROM_I2C_ADDRESS, 0, 1, (u8 *)&expansion_config,
sizeof(expansion_config));
/* retry reading configuration data with 16bit addressing */
if ((expansion_config.device_vendor == 0xFFFFFF00) ||
(expansion_config.device_vendor == 0xFFFFFFFF)) {
printf("EEPROM is blank or 8bit addressing failed: retrying with 16bit:\n");
i2c_read(EXPANSION_EEPROM_I2C_ADDRESS, 0, 2, (u8 *)&expansion_config,
sizeof(expansion_config));
}
i2c_set_bus_num(TWL4030_I2C_BUS);
return expansion_config.device_vendor;