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Subject: Re: ingenic-adc.c:undefined reference to `clk_get_parent'
To:     kernel test robot <lkp@intel.com>,
        Jonathan Cameron <Jonathan.Cameron@huawei.com>,
        "linux-clk@vger.kernel.org" <linux-clk@vger.kernel.org>
Cc:     kbuild-all@lists.01.org, linux-kernel@vger.kernel.org,
        Andy Shevchenko <andy.shevchenko@gmail.com>,
        Stephen Boyd <sboyd@kernel.org>,
        Michael Turquette <mturquette@baylibre.com>
References: <202103162301.oomY9NwI-lkp@intel.com>
From:   Randy Dunlap <rdunlap@infradead.org>
Message-ID: <ac51550d-c72e-4a85-ed0e-a4cddbf495be@infradead.org>
Date:   Sun, 25 Apr 2021 22:43:43 -0700
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[add linux-clk + maintainers]

On 3/16/21 8:54 AM, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   1a4431a5db2bf800c647ee0ed87f2727b8d6c29c
> commit: a07a4fe5ff460e99293c0d682421920d54e31d7f iio:adc:ingenic: drop of_match_ptr protection and include mod_devicetable.h
> date:   8 months ago
> config: mips-randconfig-p001-20210316 (attached as .config)
> compiler: mips-linux-gcc (GCC) 9.3.0
> 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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a07a4fe5ff460e99293c0d682421920d54e31d7f
>         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>         git fetch --no-tags linus master
>         git checkout a07a4fe5ff460e99293c0d682421920d54e31d7f
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
> 
> All errors (new ones prefixed by >>):
> 
>    mips-linux-ld: drivers/iio/adc/ingenic-adc.o: in function `jz4770_adc_init_clk_div':
>>> ingenic-adc.c:(.text+0x8c): undefined reference to `clk_get_parent'
>    mips-linux-ld: drivers/iio/adc/ingenic-adc.o: in function `jz4725b_adc_init_clk_div':
>    ingenic-adc.c:(.text+0x164): undefined reference to `clk_get_parent'

Hi,

My guess (analysis) suggests that this problem is due to
a difference in when clk_get_parent() is available between
<linux/clk.h> where it depends on CONFIG_HAVE_CLK and
drivers/clk/clk.c, which is built iff CONFIG_COMMON_CLK.

Any comments/suggestions?

thanks.
-- 
~Randy