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Date:   Sun, 26 Nov 2023 04:00:24 +0800
From:   kernel test robot <lkp@intel.com>
To:     Andreas Kemnade <andreas@kemnade.info>, lee@kernel.org,
        robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org,
        conor+dt@kernel.org, bcousson@baylibre.com, tony@atomide.com,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-omap@vger.kernel.org
Cc:     llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev
Subject: Re: [PATCH 2/6] twl-core: add power off implementation for twl603x
Message-ID: <202311260213.vq3gMAgF-lkp@intel.com>
References: <20231125092938.16535-3-andreas@kemnade.info>
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In-Reply-To: <20231125092938.16535-3-andreas@kemnade.info>
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Hi Andreas,

kernel test robot noticed the following build warnings:

[auto build test WARNING on robh/for-next]
[also build test WARNING on lee-mfd/for-mfd-next linus/master v6.7-rc2 next-20231124]
[cannot apply to tmlind-omap/for-next lee-mfd/for-mfd-fixes]
[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/Andreas-Kemnade/dt-bindings-mfd-ti-twl-Document-system-power-controller/20231125-173426
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/20231125092938.16535-3-andreas%40kemnade.info
patch subject: [PATCH 2/6] twl-core: add power off implementation for twl603x
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20231126/202311260213.vq3gMAgF-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231126/202311260213.vq3gMAgF-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311260213.vq3gMAgF-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/mfd/twl-core.c:690:6: warning: no previous prototype for function 'twl6030_power_off' [-Wmissing-prototypes]
   void twl6030_power_off(void)
        ^
   drivers/mfd/twl-core.c:690:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void twl6030_power_off(void)
   ^
   static 
   1 warning generated.


vim +/twl6030_power_off +690 drivers/mfd/twl-core.c

   689	
 > 690	void twl6030_power_off(void)
   691	{
   692	#define APP_DEVOFF      (1<<0)
   693	#define CON_DEVOFF      (1<<1)
   694	#define MOD_DEVOFF      (1<<2)
   695	
   696		int err;
   697		u8 val;
   698	
   699		err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &val,
   700				      TWL6030_PHOENIX_DEV_ON);
   701		if (err) {
   702			pr_err("I2C error %d reading PHOENIX_DEV_ON\n", err);
   703			return;
   704		}
   705	
   706		val |= APP_DEVOFF | CON_DEVOFF | MOD_DEVOFF;
   707	
   708		err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, val,
   709				       TWL6030_PHOENIX_DEV_ON);
   710		if (err)
   711			pr_err("TWL6030 Unable to power off\n");
   712	}
   713	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki