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platform/chrome: Use proper protocol transfer function 

pkt_xfer should be used for protocol v3, and cmd_xfer otherwise. We had
one instance of these functions correct, but not the second, fall-back
case. We use the fall-back only when the first command returns an
IN_PROGRESS status, which is only used on some EC firmwares where we
don't want to constantly poll the bus, but instead back off and
sleep/retry for a little while.

Fixes: 2c7589af3c ("mfd: cros_ec: add proto v3 skeleton")
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Signed-off-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Benson Leung <bleung@chromium.org>
This commit is contained in:
Shawn Nematbakhsh 2017-09-08 13:50:11 -07:00 committed by Benson Leung
parent e675191729
commit d48b8c58c5
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GPG Key ID: 1F09F57B0A2FE658
1 changed files with 5 additions and 3 deletions
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8
drivers/platform/chrome/cros_ec_proto.c
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@ -60,12 +60,14 @@ static int send_command(struct cros_ec_device *ec_dev,
struct cros_ec_command *msg)
{
int ret;
int (*xfer_fxn)(struct cros_ec_device *ec, struct cros_ec_command *msg);
if (ec_dev->proto_version > 2)
ret = ec_dev->pkt_xfer(ec_dev, msg);
xfer_fxn = ec_dev->pkt_xfer;
else
ret = ec_dev->cmd_xfer(ec_dev, msg);
xfer_fxn = ec_dev->cmd_xfer;
ret = (*xfer_fxn)(ec_dev, msg);
if (msg->result == EC_RES_IN_PROGRESS) {
int i;
struct cros_ec_command *status_msg;
@ -88,7 +90,7 @@ static int send_command(struct cros_ec_device *ec_dev,
for (i = 0; i < EC_COMMAND_RETRIES; i++) {
usleep_range(10000, 11000);
ret = ec_dev->cmd_xfer(ec_dev, status_msg);
ret = (*xfer_fxn)(ec_dev, status_msg);
if (ret < 0)
break;