linux-kernel - Re: [PATCH v4 2/3] spi: cadence-quadspi: Add clock configuration for StarFive JH7110 QSPI

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Date:   Wed, 5 Jul 2023 08:21:31 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     William Qiu <william.qiu@...rfivetech.com>,
        devicetree@...r.kernel.org, linux-spi@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org
Cc:     Mark Brown <broonie@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Emil Renner Berthing <kernel@...il.dk>,
        Ziv Xu <ziv.xu@...rfivetech.com>
Subject: Re: [PATCH v4 2/3] spi: cadence-quadspi: Add clock configuration for
 StarFive JH7110 QSPI

On 04/07/2023 11:04, William Qiu wrote:
> Add QSPI clock operation in device probe.
> 
> Signed-off-by: William Qiu <william.qiu@...rfivetech.com>
> Reviewed-by: Hal Feng <hal.feng@...rfivetech.com>
> Reported-by: kernel test robot <lkp@...el.com>
> Closes: https://lore.kernel.org/oe-kbuild-all/202306022017.UbwjjWRN-lkp@intel.com/
> Reported-by: Julia Lawall <julia.lawall@...ia.fr>
> Closes: https://lore.kernel.org/r/202306040644.6ZHs55x4-lkp@intel.com/


>  
> @@ -1840,6 +1858,8 @@ static int cqspi_resume(struct device *dev)
>  	struct spi_master *master = dev_get_drvdata(dev);
>  
>  	clk_prepare_enable(cqspi->clk);
> +	if (of_device_is_compatible(dev->of_node, "starfive,jh7110-qspi"))

Don't add compatible checks inside the code. It does not scale. We
expect compatibles to be listed only in one place - of_device_id - and
customize driver with match data / quirks / flags.

Comment applies to all your diff hunks.

> +		clk_bulk_prepare_enable(cqspi->num_clks, cqspi->clks);
>  	cqspi_wait_idle(cqspi);
>  	cqspi_controller_init(cqspi);
>  

Best regards,
Krzysztof