> On 13 Mar 2019, at 15.42, Stefano Babic <sba...@denx.de> wrote:
>
> On 13/03/19 14:01, Heiko Schocher wrote:
>> Hello Stefano,
>>
>> Am 13.03.2019 um 11:04 schrieb Stefano Babic:
>>> Hi Ian,
>>>
>>> On 31/01/19 15:21, Ian Ray wrote:
>>>> Since 2018.11, the pattern of bootcount load and store has changed such
>>>> that bootcount_inc() and bootcount_error() will load, increment, store,
>>>> and load *again*. The second load exposes a timing problem whereby the
>>>> i2c read fails. The root cause _seems_ to relate to performance of the
>>>> 24c08 EEPROM. Insert a delay after writing to work around this.
>>>>
>>>> Signed-off-by: Ian Ray <ian....@ge.com>
>>>> ---
>>>> drivers/bootcount/bootcount_i2c.c | 4 ++++
>>>> 1 file changed, 4 insertions(+)
>>>>
>>>> diff --git a/drivers/bootcount/bootcount_i2c.c
>>>> b/drivers/bootcount/bootcount_i2c.c
>>>> index ed22389..dd86426 100644
>>>> --- a/drivers/bootcount/bootcount_i2c.c
>>>> +++ b/drivers/bootcount/bootcount_i2c.c
>>>> @@ -64,6 +64,10 @@ void bootcount_store(ulong a)
>>>> CONFIG_BOOTCOUNT_ALEN, buf, sizeof(buf));
>>>> if (ret != 0)
>>>> puts("Error writing bootcount\n");
>>>> + else
>>>> + /* Datasheet claims 2 ms typical write cycle time.
>>>> + * This delay ensures that next read will succeed. */
>>>> + mdelay(5);
>>>>
>>>
>>> I see, but this is device specific while bootcount_i2c should be
>>> device-unaware. I know this driver is used with PMIC where no delay is
>>> required. Heiko, is it ok to put a fix delay here or should be
>>> configurable ?
>>
>> I would prefer here to make this timeout configurable, thinking
>> about boottime constraints.
>>
>
> Right, I see the same - Ian, I have applied the whole series with the
> exception of this one to u-boot-imx, next branch.
>
Thank you! I will look in to the configuration.
> Regards,
> Stefano
>
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