linux-kernel - Re: [PATCH v2] media: i2c: Add OV05C10 camera sensor driver

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Message-ID: <2cce157d-eaba-44c1-89d1-7e5088ee361f@amd.com>
Date: Mon, 31 Mar 2025 15:19:20 -0400
From: "Nirujogi, Pratap" <pnirujog@....com>
To: Krzysztof Kozlowski <krzk@...nel.org>,
 Pratap Nirujogi <pratap.nirujogi@....com>, mchehab@...nel.org,
 sakari.ailus@...ux.intel.com, hverkuil@...all.nl,
 laurent.pinchart@...asonboard.com, dave.stevenson@...pberrypi.com,
 dan.carpenter@...aro.org
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
 benjamin.chan@....com, bin.du@....com, grosikop@....com, king.li@....com,
 dantony@....com, Venkata Narendra Kumar Gutta <vengutta@....com>
Subject: Re: [PATCH v2] media: i2c: Add OV05C10 camera sensor driver

Hi Krzysztof,

Thanks for the review.

Thanks,
Pratap

On 3/29/2025 12:30 AM, Krzysztof Kozlowski wrote:
> Caution: This message originated from an External Source. Use proper caution when opening attachments, clicking links, or responding.
> 
> 
> On 28/03/2025 22:42, Pratap Nirujogi wrote:
>> +static int ov05c10_probe(struct i2c_client *client)
>> +{
>> +     struct ov05c10 *ov05c10;
>> +     u32 refclk;
>> +     int ret;
>> +
>> +     ov05c10 = devm_kzalloc(&client->dev, sizeof(*ov05c10), GFP_KERNEL);
>> +     if (!ov05c10)
>> +             return -ENOMEM;
>> +
>> +     struct fwnode_handle *fwnode = dev_fwnode(&client->dev);
>> +
>> +     ret = fwnode_property_read_u32(fwnode, "refclk", &refclk);
> 
> Use existing properties, like clock-frequency. refclk means this is the
> clock, not it's frequency.
> 
sure, will replace "refclk" with "clock-frequency" variable in the next 
V3 patch.

>> +     if (ret)
>> +             return  dev_err_probe(&client->dev, -EINVAL,
>> +                                   "fail to get refclk\n");
>> +     if (refclk != OV05C10_REF_CLK)
>> +             return dev_err_probe(&client->dev, -EINVAL,
>> +                                  "failbad refclk %u, %lu expected\n",
>> +                                  refclk, OV05C10_REF_CLK);
>> +
>> +     ret = ov05c10_parse_endpoint(&client->dev, fwnode);
>> +     if (ret)
>> +             return dev_err_probe(&client->dev, -EINVAL,
>> +                                  "fail to parse endpoint\n");
>> +
>> +     ov05c10->enable_gpio = devm_gpiod_get(&client->dev, "sensor0_enable",
>> +                                           GPIOD_OUT_LOW);
> 
> Nothing improved and you did not bothered to wait for my feedback. You
> just sent v2.
> 
sorry, I should have waited for your feedback before submitting V2. I 
will use the suggested name "enable" in the next V3 submission.

> There is no second GPIO, otherwise would be present here.
> 
I rechecked both GPIOs. Only one is relevant for sensor driver and other 
one is for the ISP driver. Sorry for the confusion caused.

> NAK.
> 
> 
> 
> Best regards,
> Krzysztof