linux-kernel - Re: [PATCH] hwmon: (tmp401) Add of_match

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Date:   Mon, 2 May 2022 11:20:34 +0200
From:   Camel Guo <camelg@...s.com>
To:     Guenter Roeck <linux@...ck-us.net>, Camel Guo <Camel.Guo@...s.com>,
        Jean Delvare <jdelvare@...e.com>
CC:     "linux-hwmon@...r.kernel.org" <linux-hwmon@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        kernel <kernel@...s.com>
Subject: Re: [PATCH] hwmon: (tmp401) Add of_match_table

On 4/29/22 18:22, Guenter Roeck wrote:
> On 4/29/22 02:52, Camel Guo wrote:
>> Add the missing of_match_table to allow device tree probing
>> 
> 
> I2C devices probe based on the I2C device table even on devicetree systems,
> so this isn't a correct statement. Please provide evidence and explain
> in detail the circumstances where this does not work.

Commit message was updated in v2. Please check out v2 instead.

> 
> Guenter
> 
>> Signed-off-by: Camel Guo <camel.guo@...s.com>
>> ---
>>   drivers/hwmon/tmp401.c | 11 +++++++++++
>>   1 file changed, 11 insertions(+)
>> 
>> diff --git a/drivers/hwmon/tmp401.c b/drivers/hwmon/tmp401.c
>> index a58a2f31a07e..cc0a1c219b1f 100644
>> --- a/drivers/hwmon/tmp401.c
>> +++ b/drivers/hwmon/tmp401.c
>> @@ -750,10 +750,21 @@ static int tmp401_probe(struct i2c_client *client)
>>        return 0;
>>   }
>>   
>> +static const struct of_device_id __maybe_unused tmp4xx_of_match[] = {
>> +     { .compatible = "ti,tmp401", },
>> +     { .compatible = "ti,tmp411", },
>> +     { .compatible = "ti,tmp431", },
>> +     { .compatible = "ti,tmp432", },
>> +     { .compatible = "ti,tmp435", },
>> +     { },
>> +};
>> +MODULE_DEVICE_TABLE(of, tmp4xx_of_match);
>> +
>>   static struct i2c_driver tmp401_driver = {
>>        .class          = I2C_CLASS_HWMON,
>>        .driver = {
>>                .name   = "tmp401",
>> +             .of_match_table = of_match_ptr(tmp4xx_of_match),
>>        },
>>        .probe_new      = tmp401_probe,
>>        .id_table       = tmp401_id,
>