[U-Boot] [PATCH] Revert "common, env: Fix support for environment in i2c eeprom"

[Valentin Longchamp]

Hi Matthias,

On 10/14/2014 02:32 PM, Matthias Fuchs wrote:
> Hi Valentin,
> 
> my patch fixed environment from i2c eeprom. I am not sure on which board
> I ran into that trouble. Probably PMC440. So reverting my former patch
> will break environment in i2c eeprom again on many boards.

Good that you have answered to patch. I run into that trouble on our Keymile
boards that have the environment in the EEPROM. On our boards, the environment
eeprom works with or without your patch. However, with your patch, I cannot
directly access ANY eeprom which is not on the CONFIG_I2C_ENV_EEPROM_BUS bus.

> 
> But perhaps there's a better way to fix that.

I think that the proposal that Holger made to actually define
CONFIG_I2C_ENV_EEPROM_BUS for your boards is what I would try first.

Valentin

> 
> Matthias
> 
> 
> On 10/14/2014 11:16 AM, Valentin Longchamp wrote:
>> Since i2c_init_all always sets the bus back to CONFIG_SYS_SPD_BUS_NUM
>> for compatibility reasons, it means that any eeprom not located on this
>> CONFIG_SYS_SPD_BUS_NUM is not accessible with the eeprom commands, even
>> if you change the bus number with an i2c dev command before.
>>
>> Furthermore i2c_init_all should disappear and is currently only called
>> from the early board initialisation sequences, it is not suited for
>> other usage.
>>
>> This reverts commit 01a0c64762e902971b34587a8a61b59e9ea51374.
>>
>> Signed-off-by: Valentin Longchamp <valentin.longchamp at keymile.com>
>>
>> ---
>>
>>  common/cmd_eeprom.c | 9 ++-------
>>  1 file changed, 2 insertions(+), 7 deletions(-)
>>
>> diff --git a/common/cmd_eeprom.c b/common/cmd_eeprom.c
>> index a02f0cb..29f0f1f 100644
>> --- a/common/cmd_eeprom.c
>> +++ b/common/cmd_eeprom.c
>> @@ -389,13 +389,8 @@ void eeprom_init  (void)
>>  #if defined(CONFIG_SPI) && !defined(CONFIG_ENV_EEPROM_IS_ON_I2C)
>>  	spi_init_f ();
>>  #endif
>> -#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C_SOFT) || \
>> -	defined(CONFIG_SYS_I2C)
>> -#ifdef CONFIG_SYS_I2C
>> -	i2c_init_all();
>> -#else
>> -	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
>> -#endif
>> +#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C_SOFT)
>> +	i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
>>  #endif
>>  }
>>  
>>
> 
>