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 <[email protected]> Signed-off-by: Doug Anderson <[email protected]> Signed-off-by: Lee Jones <[email protected]>
rtvt123 · Jul 9, 2014 · 9c5edb6 · 9c5edb6
1 parent 7e6cb5b
commit 9c5edb6
Showing 1 changed file with 6 additions and 0 deletions.
diff --git 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);