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From:   Prashant Malani <pmalani@chromium.org>
To:     linux-kernel@vger.kernel.org
Cc:     Prashant Malani <pmalani@chromium.org>,
        Benson Leung <bleung@chromium.org>,
        Enric Balletbo i Serra <enric.balletbo@collabora.com>,
        Guenter Roeck <groeck@chromium.org>
Subject: [PATCH v2 2/2] platform/chrome: cros_ec_typec: Use existing feature check
Date:   Tue,  3 Aug 2021 10:36:21 -0700
Message-Id: <20210803173619.91539-2-pmalani@chromium.org>
In-Reply-To: <20210803173619.91539-1-pmalani@chromium.org>
References: <20210803173619.91539-1-pmalani@chromium.org>
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Replace the cros_typec_feature_supported() function with the
pre-existing cros_ec_check_features() function which does the same
thing.

Signed-off-by: Prashant Malani <pmalani@chromium.org>
---
Changes in v2:
- Dropped unnecessary NULL checks, per review comments.

 drivers/platform/chrome/cros_ec_typec.c | 27 +++++--------------------
 1 file changed, 5 insertions(+), 22 deletions(-)

diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c
index 27c068c4c38d..262a891eded3 100644
--- a/drivers/platform/chrome/cros_ec_typec.c
+++ b/drivers/platform/chrome/cros_ec_typec.c
@@ -1054,24 +1054,6 @@ static int cros_typec_get_cmd_version(struct cros_typec_data *typec)
 	return 0;
 }
 
-/* Check the EC feature flags to see if TYPEC_* features are supported. */
-static int cros_typec_feature_supported(struct cros_typec_data *typec, enum ec_feature_code feature)
-{
-	struct ec_response_get_features resp = {};
-	int ret;
-
-	ret = cros_typec_ec_command(typec, 0, EC_CMD_GET_FEATURES, NULL, 0,
-				    &resp, sizeof(resp));
-	if (ret < 0) {
-		dev_warn(typec->dev,
-			 "Failed to get features, assuming typec feature=%d unsupported.\n",
-			 feature);
-		return 0;
-	}
-
-	return resp.flags[feature / 32] & EC_FEATURE_MASK_1(feature);
-}
-
 static void cros_typec_port_work(struct work_struct *work)
 {
 	struct cros_typec_data *typec = container_of(work, struct cros_typec_data, port_work);
@@ -1113,6 +1095,7 @@ MODULE_DEVICE_TABLE(of, cros_typec_of_match);
 
 static int cros_typec_probe(struct platform_device *pdev)
 {
+	struct cros_ec_dev *ec_dev = NULL;
 	struct device *dev = &pdev->dev;
 	struct cros_typec_data *typec;
 	struct ec_response_usb_pd_ports resp;
@@ -1132,10 +1115,10 @@ static int cros_typec_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	typec->typec_cmd_supported = !!cros_typec_feature_supported(typec,
-					EC_FEATURE_TYPEC_CMD);
-	typec->needs_mux_ack = !!cros_typec_feature_supported(typec,
-					EC_FEATURE_TYPEC_MUX_REQUIRE_AP_ACK);
+	ec_dev = dev_get_drvdata(&typec->ec->ec->dev);
+	typec->typec_cmd_supported = !!cros_ec_check_features(ec_dev, EC_FEATURE_TYPEC_CMD);
+	typec->needs_mux_ack = !!cros_ec_check_features(ec_dev,
+							EC_FEATURE_TYPEC_MUX_REQUIRE_AP_ACK);
 
 	ret = cros_typec_ec_command(typec, 0, EC_CMD_USB_PD_PORTS, NULL, 0,
 				    &resp, sizeof(resp));
-- 
2.32.0.554.ge1b32706d8-goog