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authorSimon Glass <sjg@chromium.org>2014-06-18 11:14:01 -0700
committerLee Jones <lee.jones@linaro.org>2014-07-09 14:58:16 +0100
commit9c5edb6c458b04a243c4ba09a60349367b36e761 (patch)
tree5f10cbc3b1603ddaa461d7ed6e2cbd789fd0c2f6
parent7e6cb5b4dbbc4b1d98289c88d0bc4092cac328be (diff)
downloadlinux-9c5edb6c458b04a243c4ba09a60349367b36e761.tar.bz2
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>
-rw-r--r--drivers/mfd/cros_ec_spi.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/mfd/cros_ec_spi.c b/drivers/mfd/cros_ec_spi.c
index 6c3075fb5dc7..9d45d88813b8 100644
--- a/drivers/mfd/cros_ec_spi.c
+++ b/drivers/mfd/cros_ec_spi.c
@@ -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);