linux-kernel - Re: [PATCH v2 1/2] pwm: rcar: drop of_match

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Message-ID: <74309bed-e46c-69fc-e0c7-6d06c30fbc4f@linaro.org>
Date:   Wed, 22 Mar 2023 19:12:08 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Fabrice Gasnier <fabrice.gasnier@...s.st.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        linux-pwm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 1/2] pwm: rcar: drop of_match_ptr for ID table

On 12/03/2023 16:42, Uwe Kleine-König wrote:
> Hello,
> 
> On Sun, Mar 12, 2023 at 02:51:19PM +0100, Krzysztof Kozlowski wrote:
>> The driver can match only via the DT table so the table should be always
>> used and the of_match_ptr does not have any sense (this also allows ACPI
>> matching via PRP0001, even though it might not be relevant here).  This
>> also fixes !CONFIG_OF error:
>>
>>   drivers/pwm/pwm-rcar.c:252:34: error: ‘rcar_pwm_of_table’ defined but not used [-Werror=unused-const-variable=]
>>
>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> 
> Hmm, I wonder what else is required here to trigger that warning. On
> amd64 I also disabled CONFIG_MODULES as otherwise rcar_pwm_of_table is
> used by
> 
> 	MODULE_DEVICE_TABLE(of, rcar_pwm_of_table);

1. x86_64 allyesconfig, remove CONFIG_OF
2. Build with W=1 (this was GCC)

Best regards,
Krzysztof