linux-kernel - Re: [PATCH v13 2/2] clk: clk-loongson2: add clock controller driver support

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Date:   Thu, 9 Mar 2023 07:37:19 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     zhuyinbo <zhuyinbo@...ngson.cn>, kernel test robot <lkp@...el.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org, devicetree@...r.kernel.org
Cc:     oe-kbuild-all@...ts.linux.dev, Jianmin Lv <lvjianmin@...ngson.cn>,
        Liu Peibao <liupeibao@...ngson.cn>, wanghongliang@...ngson.cn,
        loongson-kernel@...ts.loongnix.cn
Subject: Re: [PATCH v13 2/2] clk: clk-loongson2: add clock controller driver
 support

On 09/03/2023 07:27, zhuyinbo wrote:
> 
> 在 2023/3/9 下午2:09, Krzysztof Kozlowski 写道:
>> On 09/03/2023 04:18, zhuyinbo wrote:
>>> 在 2023/3/9 上午10:58, zhuyinbo 写道:
>>>> 在 2023/3/8 下午8:16, kernel test robot 写道:
>>>>> Hi Yinbo,
>>>>>
>>>>> I love your patch! Yet something to improve:
>>>>>
>>>>> [auto build test ERROR on clk/clk-next]
>>>>> [also build test ERROR on robh/for-next linus/master v6.3-rc1
>>>>> next-20230308]
>>>>> [If your patch is applied to the wrong git tree, kindly drop us a note.
>>>>> And when submitting patch, we suggest to use '--base' as documented in
>>>>> https://git-scm.com/docs/git-format-patch#_base_tree_information]
>>>>>
>>>>> url:
>>>>> https://github.com/intel-lab-lkp/linux/commits/Yinbo-Zhu/clk-clk-loongson2-add-clock-controller-driver-support/20230307-195252
>>>>> base: https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git
>>>>> clk-next
>>>>> patch link:
>>>>> https://lore.kernel.org/r/20230307115022.12846-2-zhuyinbo%40loongson.cn
>>>>> patch subject: [PATCH v13 2/2] clk: clk-loongson2: add clock
>>>>> controller driver support
>>>>> config: mips-allyesconfig
>>>>> (https://download.01.org/0day-ci/archive/20230308/202303082037.QPfBP64A-lkp@intel.com/config)
>>>>> compiler: mips-linux-gcc (GCC) 12.1.0
>>>>> reproduce (this is a W=1 build):
>>>>>           wget
>>>>> https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross
>>>>> -O ~/bin/make.cross
>>>>>           chmod +x ~/bin/make.cross
>>>>>           #
>>>>> https://github.com/intel-lab-lkp/linux/commit/391d6fc63ac65f5456e4755c9dd85232a6296285
>>>>>           git remote add linux-review
>>>>> https://github.com/intel-lab-lkp/linux
>>>>>           git fetch --no-tags linux-review
>>>>> Yinbo-Zhu/clk-clk-loongson2-add-clock-controller-driver-support/20230307-195252
>>>>>           git checkout 391d6fc63ac65f5456e4755c9dd85232a6296285
>>>>>           # save the config file
>>>>>           mkdir build_dir && cp config build_dir/.config
>>>>>           COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0
>>>>> make.cross W=1 O=build_dir ARCH=mips olddefconfig
>>>>>           COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0
>>>>> make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash drivers/
>>>>>
>>>>> If you fix the issue, kindly add following tag where applicable
>>>>> | Reported-by: kernel test robot <lkp@...el.com>
>>>>> | Link:
>>>>> https://lore.kernel.org/oe-kbuild-all/202303082037.QPfBP64A-lkp@intel.com/
>>>>>
>>>>> All errors (new ones prefixed by >>):
>>>>>
>>>>>      drivers/clk/clk-loongson2.c: In function 'loongson2_calc_pll_rate':
>>>>>>> drivers/clk/clk-loongson2.c:79:15: error: implicit declaration of
>>>>>>> function 'readq'; did you mean 'readl'?
>>>>>>> [-Werror=implicit-function-declaration]
>>>>>         79 |         val = readq(loongson2_pll_base + offset);
>>>>>            |               ^~~~~
>>>>>            |               readl
>>>>>      cc1: some warnings being treated as errors
>>>> The CONFIG_64BIT not enabled in your config file, I will add a depend
>>>> on "CONFIG_64BIT" in my clock driver to fix this compile error.
>>> My clock is for LoongArch platform, The LOONGARCH had select
>>> "CONFIG_64BIT", I will add a depend on "LOONGARCH" in my clock driver to
>>> fix this compile error.
>> No. Fix your code instead.
> 
> but the readq that ask CONFIG_64BIT is enabled,  definition in 
> include/asm-generic/io.h
> 
> so need enable CONFIG_64BIT for my clk driver.

Ah, you are right, the error was not about the cast but missing readq.
Yeah, you should depend on 64BIT. Not on Loongarch because the code
should compile test on other archs.

Best regards,
Krzysztof