linux-kernel - Re: [PATCH v2] spi: stm32: disable device mode with st,stm32f4-spi compatible

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Message-ID: <79505e19-c5ee-36ee-c8ae-344c15f8b108@linaro.org>
Date:   Sat, 1 Jul 2023 10:09:05 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Valentin CARON <valentin.caron@...s.st.com>,
        Mark Brown <broonie@...nel.org>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Alain Volmat <alain.volmat@...s.st.com>,
        linux-spi@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] spi: stm32: disable device mode with st,stm32f4-spi
 compatible

On 28/06/2023 18:21, Valentin CARON wrote:
> Hi,
> 
> On 6/27/23 15:39, Krzysztof Kozlowski wrote:
>> On 27/06/2023 14:39, Valentin Caron wrote:
>>> STM32 SPI driver is not capable to handle device mode with stm32f4 soc.
>>> Stop probing if this case happens, and print an error with involved
>>> compatible.
>>>
>> ...
>>
>>>   
>>>   static const struct of_device_id stm32_spi_of_match[] = {
>>> @@ -1798,8 +1802,16 @@ static int stm32_spi_probe(struct platform_device *pdev)
>>>   	struct device_node *np = pdev->dev.of_node;
>>>   	bool device_mode;
>>>   	int ret;
>>> +	const char *compatible =
>>> +		of_match_device(pdev->dev.driver->of_match_table, &pdev->dev)->compatible;
>> The goal was to replace it, so drop it.
> Is is still needed for dev_err, so I can't

Why do you need it for dev_err? Isn't it entirely redundant?

Best regards,
Krzysztof