linux-kernel - Re: [PATCH 6/8] mfd: max77714: Add driver for Maxim MAX77714 PMIC

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Message-ID: <5236720c-96b0-3e18-e08f-a5dde982eab5@lucaceresoli.net>
Date:   Wed, 13 Oct 2021 23:39:32 +0200
From:   Luca Ceresoli <luca@...aceresoli.net>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        linux-kernel@...r.kernel.org
Cc:     Lee Jones <lee.jones@...aro.org>, Rob Herring <robh+dt@...nel.org>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>, devicetree@...r.kernel.org,
        linux-rtc@...r.kernel.org, linux-watchdog@...r.kernel.org,
        Chiwoong Byun <woong.byun@...sung.com>,
        Laxman Dewangan <ldewangan@...dia.com>
Subject: Re: [PATCH 6/8] mfd: max77714: Add driver for Maxim MAX77714 PMIC

Hi,

On 12/10/21 10:32, Krzysztof Kozlowski wrote:
> On 11/10/2021 17:56, Luca Ceresoli wrote:
>> Add a simple driver for the Maxim MAX77714 PMIC, supporting RTC and
>> watchdog only.
>>
>> Signed-off-by: Luca Ceresoli <luca@...aceresoli.net>
>> ---
>>  MAINTAINERS                  |   2 +
>>  drivers/mfd/Kconfig          |  14 ++++
>>  drivers/mfd/Makefile         |   1 +
>>  drivers/mfd/max77714.c       | 151 +++++++++++++++++++++++++++++++++++
>>  include/linux/mfd/max77714.h |  68 ++++++++++++++++
>>  5 files changed, 236 insertions(+)
>>  create mode 100644 drivers/mfd/max77714.c
>>  create mode 100644 include/linux/mfd/max77714.h
>>
> 
> (...)
> 
>> +
>> +static const struct of_device_id max77714_dt_match[] = {
>> +	{ .compatible = "maxim,max77714" },
>> +	{},
>> +};
> 
> When converting to module - don't forget the MODULE_DEVICE_TABLE
> 
>> +
>> +static struct i2c_driver max77714_driver = {
>> +	.driver = {
>> +		.name = "max77714",
>> +		.of_match_table = of_match_ptr(max77714_dt_match),
> 
> Kbuild robot pointed it out - of_matc_ptr should not be needed, even for
> compile testing without OF.

I wonder whether it's better to add '#ifdef CONFIG_OF / #endif' around
the struct of_device_id declaration. I think it's what most drivers do,
even though I tend to prefer not adding #ifdefs making code less clean
only for COMPILE_TESTING.

-- 
Luca