linux-kernel - [PATCH] platform/chrome: cros_ec_typec: Make try power role optional

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Date:   Thu, 27 Jan 2022 19:16:59 +0000
From:   Prashant Malani <pmalani@...omium.org>
To:     linux-kernel@...r.kernel.org
Cc:     Prashant Malani <pmalani@...omium.org>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Benson Leung <bleung@...omium.org>,
        chrome-platform@...ts.linux.dev (open list:CHROMEOS EC USB TYPE-C
        DRIVER), Guenter Roeck <groeck@...omium.org>
Subject: [PATCH] platform/chrome: cros_ec_typec: Make try power role optional

Some boards prefer not to specify a try-power-role. Update the port
property parsing logic to not error out in case a try-power-role is not
specified.

Cc: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Signed-off-by: Prashant Malani <pmalani@...omium.org>
---
 drivers/platform/chrome/cros_ec_typec.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c
index 5de0bfb0bc4d..ee12658009e5 100644
--- a/drivers/platform/chrome/cros_ec_typec.c
+++ b/drivers/platform/chrome/cros_ec_typec.c
@@ -115,17 +115,18 @@ static int cros_typec_parse_port_props(struct typec_capability *cap,
 		return ret;
 	cap->data = ret;
 
+	/* Try-power-role is optional. */
 	ret = fwnode_property_read_string(fwnode, "try-power-role", &buf);
 	if (ret) {
-		dev_err(dev, "try-power-role not found: %d\n", ret);
-		return ret;
+		dev_warn(dev, "try-power-role not found: %d\n", ret);
+		cap->prefer_role = TYPEC_NO_PREFERRED_ROLE;
+	} else {
+		ret = typec_find_power_role(buf);
+		if (ret < 0)
+			return ret;
+		cap->prefer_role = ret;
 	}
 
-	ret = typec_find_power_role(buf);
-	if (ret < 0)
-		return ret;
-	cap->prefer_role = ret;
-
 	cap->fwnode = fwnode;
 
 	return 0;
-- 
2.35.0.rc0.227.g00780c9af4-goog