From 9c5edb6c458b04a243c4ba09a60349367b36e761 Mon Sep 17 00:00:00 2001
From: Simon Glass <sjg@chromium.org>
Date: Wed, 18 Jun 2014 11:14:01 -0700
Subject: [PATCH] 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>
---
drivers/mfd/cros_ec_spi.c | 6 ++++++
1 file changed, 6 insertions(+)
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);