Hi Daniel,

I love your patch! Perhaps something to improve:

[auto build test WARNING on pm/linux-next]
[also build test WARNING on lee-mfd/for-mfd-next linus/master v5.13-rc4 next-20210603]
[cannot apply to gpio/for-next]
[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]

url:    https://github.com/0day-ci/linux/commits/Daniel-Scally/Introduce-intel_skl_int3472-module/20210604-064345
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: x86_64-randconfig-r012-20210604 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 5c0d1b2f902aa6a9cf47cc7e42c5b83bb2217cf9)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/0day-ci/linux/commit/3edcad8c200f211063a35d125e9fd350a2efeb40
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Daniel-Scally/Introduce-intel_skl_int3472-module/20210604-064345
        git checkout 3edcad8c200f211063a35d125e9fd350a2efeb40
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/platform/x86/intel-int3472/intel_skl_int3472_tps68470.c:76:5: warning: no previous prototype for function 'skl_int3472_tps68470_calc_type' [-Wmissing-prototypes]
   int skl_int3472_tps68470_calc_type(struct acpi_device *adev)
       ^
   drivers/platform/x86/intel-int3472/intel_skl_int3472_tps68470.c:76:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int skl_int3472_tps68470_calc_type(struct acpi_device *adev)
   ^
   static 
   1 warning generated.


vim +/skl_int3472_tps68470_calc_type +76 drivers/platform/x86/intel-int3472/intel_skl_int3472_tps68470.c

    52	
    53	/** skl_int3472_tps68470_calc_type: Check what platform a device is designed for
    54	 * @adev: A pointer to a &struct acpi_device
    55	 *
    56	 * Check CLDB buffer against the PMIC's adev. If present, then we check
    57	 * the value of control_logic_type field and follow one of the
    58	 * following scenarios:
    59	 *
    60	 *	1. No CLDB - likely ACPI tables designed for ChromeOS. We
    61	 *	create platform devices for the GPIOs and OpRegion drivers.
    62	 *
    63	 *	2. CLDB, with control_logic_type = 2 - probably ACPI tables
    64	 *	made for Windows 2-in-1 platforms. Register pdevs for GPIO,
    65	 *	Clock and Regulator drivers to bind to.
    66	 *
    67	 *	3. Any other value in control_logic_type, we should never have
    68	 *	gotten to this point; fail probe and return.
    69	 *
    70	 * Return:
    71	 * * 1		Device intended for ChromeOS
    72	 * * 2		Device intended for Windows
    73	 * * -EINVAL	Where @adev has an object named CLDB but it does not conform to
    74	 *		our expectations
    75	 */
  > 76	int skl_int3472_tps68470_calc_type(struct acpi_device *adev)
    77	{
    78		struct int3472_cldb cldb = { 0 };
    79		int ret;
    80	
    81		/*
    82		 * A CLDB buffer that exists, but which does not match our expectations
    83		 * should trigger an error so we don't blindly continue.
    84		 */
    85		ret = skl_int3472_fill_cldb(adev, &cldb);
    86		if (ret && ret != -ENODEV)
    87			return ret;
    88	
    89		if (ret)
    90			return DESIGNED_FOR_CHROMEOS;
    91	
    92		if (cldb.control_logic_type != 2)
    93			return -EINVAL;
    94	
    95		return DESIGNED_FOR_WINDOWS;
    96	}
    97	

---
0-DAY CI Kernel Test Service, Intel Corporation
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