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mfd: cros_ec: Detect in-progress commands 

Some commands take a while to execute. Use -EAGAIN to signal this to the
caller.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Simon Glass 2014-06-18 11:14:01 -07:00 committed by Lee Jones
parent 7e6cb5b4db
commit 9c5edb6c45
1 changed files with 6 additions and 0 deletions
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6
drivers/mfd/cros_ec_spi.c
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@ -288,6 +288,12 @@ static int cros_ec_cmd_xfer_spi(struct cros_ec_device *ec_dev,
/* check response error code */
ptr = ec_dev->din;
if (ptr[0]) {
if (ptr[0] == EC_RES_IN_PROGRESS) {
dev_dbg(ec_dev->dev, "command 0x%02x in progress\n",
ec_msg->cmd);
ret = -EAGAIN;
goto exit;
}
dev_warn(ec_dev->dev, "command 0x%02x returned an error %d\n",
ec_msg->cmd, ptr[0]);
debug_packet(ec_dev->dev, "in_err", ptr, len);