[U-Boot] [RFC/PATCH] cros_ec: i2c: Group i2c write / read into single transaction

[Simon Glass]

On 8 February 2017 at 06:02, Simon Glass <sjg at chromium.org> wrote:
> On 12 January 2017 at 10:47, Moritz Fischer <moritz.fischer at ettus.com> wrote:
>>
>> Replace dm_i2c_write() / dm_i2c_read() with transaction using
>> struct i2c_msg[2] in order to allow for i2c controller to detect
>> write/read cycle to emit a repeated start condition.
>>
>> Signed-off-by: Moritz Fischer <moritz.fischer at ettus.com>
>> Cc: Simon Glass <sjg at chromium.org>
>> Cc: u-boot at lists.denx.de
>> ---
>> Hi Simon,
>>
>> since I don't have a v2 protocol EC I couldn't test this,
>> but I noticed when playing around with a v3 one, that it would simply ignore
>> the packets if they don't have a repeated start condition (which from my understanding)
>> you can *only* get if you use struct i2c_msg, since otherwise the driver has no way of
>> knowing your intention.
>>
>> Do you have a v2 board around to test this?
>>
>> Cheers,
>>
>> Moritz
>> ---
>>  drivers/misc/cros_ec_i2c.c | 26 +++++++++++++++-----------
>>  1 file changed, 15 insertions(+), 11 deletions(-)
>
> Acked-by: Simon Glass <sjg at chromium.org>
> Tested on snow:
> Tested-by: Simon Glass <sjg at chromium.org>

Applied to u-boot-dm, thanks!