linux-kernel - [PATCH v2 4/7] media: ov5693: move hw cfg functions into ov5693_check

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220627150453.220292-5-tommaso.merciai@amarulasolutions.com>
Date:   Mon, 27 Jun 2022 17:04:50 +0200
From:   Tommaso Merciai <tommaso.merciai@...rulasolutions.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     linuxfancy@...glegroups.com, linux-amarula@...rulasolutions.com,
        quentin.schulz@...obroma-systems.com,
        Tommaso Merciai <tommaso.merciai@...rulasolutions.com>,
        Daniel Scally <djrscally@...il.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 4/7] media: ov5693: move hw cfg functions into ov5693_check_hwcfg

Move hw configuration functions into ov5693_check_hwcfg. This is done to
separe the code that handle the hw cfg from probe in a clean way

Signed-off-by: Tommaso Merciai <tommaso.merciai@...rulasolutions.com>
---
 drivers/media/i2c/ov5693.c | 53 +++++++++++++++++++++++---------------
 1 file changed, 32 insertions(+), 21 deletions(-)

diff --git a/drivers/media/i2c/ov5693.c b/drivers/media/i2c/ov5693.c
index d2adc5513a21..d5a934ace597 100644
--- a/drivers/media/i2c/ov5693.c
+++ b/drivers/media/i2c/ov5693.c
@@ -1348,6 +1348,38 @@ static int ov5693_check_hwcfg(struct ov5693_device *ov5693)
 	struct fwnode_handle *endpoint;
 	unsigned int i;
 	int ret;
+	u32 xvclk_rate;
+
+	ov5693->xvclk = devm_clk_get(ov5693->dev, "xvclk");
+	if (IS_ERR(ov5693->xvclk))
+		return dev_err_probe(ov5693->dev, PTR_ERR(ov5693->xvclk),
+				     "failed to get xvclk: %ld\n",
+				     PTR_ERR(ov5693->xvclk));
+
+	if (ov5693->xvclk) {
+		xvclk_rate = clk_get_rate(ov5693->xvclk);
+	} else {
+		ret = fwnode_property_read_u32(fwnode, "clock-frequency",
+					       &xvclk_rate);
+
+		if (ret) {
+			dev_err(ov5693->dev, "can't get clock frequency");
+			return ret;
+		}
+	}
+
+	if (xvclk_rate != OV5693_XVCLK_FREQ)
+		dev_warn(ov5693->dev, "Found clk freq %u, expected %u\n",
+			 xvclk_rate, OV5693_XVCLK_FREQ);
+
+	ret = ov5693_configure_gpios(ov5693);
+	if (ret)
+		return ret;
+
+	ret = ov5693_get_regulators(ov5693);
+	if (ret)
+		return dev_err_probe(ov5693->dev, ret,
+				     "Error fetching regulators\n");
 
 	endpoint = fwnode_graph_get_next_endpoint(fwnode, NULL);
 	if (!endpoint)
@@ -1390,7 +1422,6 @@ static int ov5693_check_hwcfg(struct ov5693_device *ov5693)
 static int ov5693_probe(struct i2c_client *client)
 {
 	struct ov5693_device *ov5693;
-	u32 xvclk_rate;
 	int ret = 0;
 
 	ov5693 = devm_kzalloc(&client->dev, sizeof(*ov5693), GFP_KERNEL);
@@ -1408,26 +1439,6 @@ static int ov5693_probe(struct i2c_client *client)
 
 	v4l2_i2c_subdev_init(&ov5693->sd, client, &ov5693_ops);
 
-	ov5693->xvclk = devm_clk_get(&client->dev, "xvclk");
-	if (IS_ERR(ov5693->xvclk)) {
-		dev_err(&client->dev, "Error getting clock\n");
-		return PTR_ERR(ov5693->xvclk);
-	}
-
-	xvclk_rate = clk_get_rate(ov5693->xvclk);
-	if (xvclk_rate != OV5693_XVCLK_FREQ)
-		dev_warn(&client->dev, "Found clk freq %u, expected %u\n",
-			 xvclk_rate, OV5693_XVCLK_FREQ);
-
-	ret = ov5693_configure_gpios(ov5693);
-	if (ret)
-		return ret;
-
-	ret = ov5693_get_regulators(ov5693);
-	if (ret)
-		return dev_err_probe(&client->dev, ret,
-				     "Error fetching regulators\n");
-
 	ov5693->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 	ov5693->pad.flags = MEDIA_PAD_FL_SOURCE;
 	ov5693->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
-- 
2.25.1