linux-kernel - Re: [PATCH v3 17/19] hwmon: (mr75203) parse temperature coefficients from device-tree

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Date:   Thu, 1 Sep 2022 12:54:26 +0300
From:   "Farber, Eliav" <farbere@...zon.com>
To:     Andy Shevchenko <andriy.shevchenko@...el.com>
CC:     <jdelvare@...e.com>, <linux@...ck-us.net>, <robh+dt@...nel.org>,
        <p.zabel@...gutronix.de>, <rtanwar@...linear.com>,
        <linux-hwmon@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <talel@...zon.com>,
        <hhhawa@...zon.com>, <jonnyc@...zon.com>, <hanochu@...zon.com>,
        <ronenk@...zon.com>, <itamark@...zon.com>, <shellykz@...zon.com>,
        <shorer@...zon.com>, <amitlavi@...zon.com>, <almogbs@...zon.com>,
        <dkl@...zon.com>, "Farber, Eliav" <farbere@...zon.com>
Subject: Re: [PATCH v3 17/19] hwmon: (mr75203) parse temperature coefficients from
 device-tree

On 8/31/2022 3:11 PM, Andy Shevchenko wrote:
> On Tue, Aug 30, 2022 at 07:22:10PM +0000, Eliav Farber wrote:
>> Use thermal coefficients from the device tree if they exist.
>> Otherwise, use default values according to the series (5 or 6).
>> All coefficients can be used or only part of them.
>>
>> The coefficients shall be used for fine tuning the default values since
>> coefficients can vary between product and product.
>
> ...
>
>> +     ret = of_property_read_u32(np, "moortec,ts-coeff-h", &coeff_h);
>
> of_ ?! Ditto for the rest.


Fixed for v4.
I replaced it with device_property_read_u32().

>> +     if (!ret)
>> +             ts_coeff->h = coeff_h;
>
> ...
>
>> +     ret = of_property_read_s32(np, "moortec,ts-coeff-j", &coeff_j);
>> +     if (!ret)
>> +             ts_coeff->j = coeff_j;
>
> You may avoid conditional:
>
>        _property_read_s32(..., "moortec,ts-coeff-j", &ts_coeff->j);


Fixed for v4.
I removed the condition.

> ...
>
>> +     ret = of_property_read_u32(np, "moortec,ts-coeff-cal5", 
>> &coeff_cal5);
>> +     if (!ret) {
>
>> +             if (coeff_cal5 == 0) {
>> +                     dev_err(dev, "moortec,ts-coeff-cal5 can't be 
>> 0\n");
>> +                     return -EINVAL;
>> +             }
>
> Code shouldn't be a YAML validator. Drop this and make sure you have 
> correct
> DT schema.


Fixed for v4.
I dropped the validation check.
The YAML already mentions that it can't be 0.

>> +             ts_coeff->cal5 = coeff_cal5;
>> +     }

--
Thanks, Eliav