linux-kernel - Re: [PATCH v9 2/2] spi: loongson: add bus driver for the loongson spi controller

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Message-ID: <16913b76-0256-492a-ec90-d367f2b52cc3@loongson.cn>
Date:   Mon, 15 May 2023 16:14:00 +0800
From:   zhuyinbo <zhuyinbo@...ngson.cn>
To:     andy.shevchenko@...il.com
Cc:     Mark Brown <broonie@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-spi@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jianmin Lv <lvjianmin@...ngson.cn>,
        wanghongliang@...ngson.cn, Liu Peibao <liupeibao@...ngson.cn>,
        loongson-kernel@...ts.loongnix.cn, zhuyinbo@...ngson.cn
Subject: Re: [PATCH v9 2/2] spi: loongson: add bus driver for the loongson spi
 controller



在 2023/5/11 下午3:18, zhuyinbo 写道:
> 
> 
> 在 2023/5/8 下午11:04, andy.shevchenko@...il.com 写道:

>>
>>> +config SPI_LOONGSON_CORE
>>> +    tristate "Loongson SPI Controller Core Driver Support"
>>
>> Does it need to be visible to the user?
> 


I try to set it invisible that by removing the SPI_LOONGSON_CORE Kconfig
or removing "tristate "Loongson SPI Controller Core Driver Support" that
will cause spi-core driver doesn't be compiled or compiled fail issue,
so I will still set it visible to the user.

>>
>>> +    res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>>> +    if (res == NULL) {
>>
>> Why not using devm_platform_ioremap_resource()?
> okay, I will use it.
>>
>>> +        dev_err(dev, "cannot get io resource memory\n");
>>> +        return -ENOENT;
>>
>>     return dev_err_probe();


It seems that there is no need to print memory log when use
devm_platform_ioremap_resource because this function had contained
the this memory log print thus I will return PTR_ERR(reg_base).

         reg_base = devm_platform_ioremap_resource(pdev, 0);
         if (IS_ERR(reg_base))
                 return PTR_ERR(reg_base);

Thanks.

>>
>>