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Commit 9798ac6d authored by Tomeu Vizoso's avatar Tomeu Vizoso Committed by Thierry Reding
Browse files

mfd: cros_ec: Add cros_ec_cmd_xfer_status() helper 



So that callers of cros_ec_cmd_xfer() don't have to repeat boilerplate
code when checking for errors from the EC side.

Signed-off-by: default avatarTomeu Vizoso <tomeu.vizoso@collabora.com>
Reviewed-by: default avatarBenson Leung <bleung@chromium.org>
Signed-off-by: default avatarBrian Norris <briannorris@chromium.org>
Acked-by: default avatarLee Jones <lee.jones@linaro.org>
Tested-by: default avatarEnric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: default avatarThierry Reding <thierry.reding@gmail.com>
parent 1a695a90

drivers/platform/chrome/cros_ec_proto.c

+17 −0
Original line number Diff line number Diff line
@@ -380,3 +380,20 @@ int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev, 
	return ret;

}

EXPORT_SYMBOL(cros_ec_cmd_xfer);



int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,

			    struct cros_ec_command *msg)

{

	int ret;



	ret = cros_ec_cmd_xfer(ec_dev, msg);

	if (ret < 0) {

		dev_err(ec_dev->dev, "Command xfer error (err:%d)\n", ret);

	} else if (msg->result != EC_RES_SUCCESS) {

		dev_dbg(ec_dev->dev, "Command result (err: %d)\n", msg->result);

		return -EPROTO;

	}



	return ret;

}

EXPORT_SYMBOL(cros_ec_cmd_xfer_status);

include/linux/mfd/cros_ec.h

+15 −0
Original line number Diff line number Diff line
@@ -225,6 +225,21 @@ int cros_ec_check_result(struct cros_ec_device *ec_dev, 
int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev,

		     struct cros_ec_command *msg);



/**

 * cros_ec_cmd_xfer_status - Send a command to the ChromeOS EC

 *

 * This function is identical to cros_ec_cmd_xfer, except it returns success

 * status only if both the command was transmitted successfully and the EC

 * replied with success status. It's not necessary to check msg->result when

 * using this function.

 *

 * @ec_dev: EC device

 * @msg: Message to write

 * @return: Num. of bytes transferred on success, <0 on failure

 */

int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,

			    struct cros_ec_command *msg);



/**

 * cros_ec_remove - Remove a ChromeOS EC

 *