mfd: cros_ec: wait for completion of commands that return IN_PROGRESS
authorAndrew Bresticker <abrestic@chromium.org>
Thu, 18 Sep 2014 15:18:58 +0000 (17:18 +0200)
committerLee Jones <lee.jones@linaro.org>
Mon, 6 Oct 2014 20:30:16 +0000 (21:30 +0100)
commitd86c21fd31114e3ef9fae64be335c76aa22859dc
tree5f376a7091afbdb813e2ad25407a7b0026d08118
parent97720706084dd8c45eecc61d39353c7b62939b8f
mfd: cros_ec: wait for completion of commands that return IN_PROGRESS

When an EC command returns EC_RES_IN_PROGRESS, we need to query
the state of the EC until it indicates that it is no longer busy.
Do this in cros_ec_cmd_xfer() under the EC's mutex so that other
commands (e.g. keyboard, I2C passtru) aren't issued to the EC while
it is working on the in-progress command.

The 10 milliseconds delay and the number of retries are the values
that were used by the flashrom tool when retrying commands.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
drivers/mfd/cros_ec.c