On 12 January 2017 at 10:47, Moritz Fischer moritz.fischer@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@ettus.com Cc: Simon Glass sjg@chromium.org Cc: u-boot@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@chromium.org Tested on snow: Tested-by: Simon Glass sjg@chromium.org