linux-kernel - Re: [PATCH v2 2/2] leds: ltc3220: Add Support for LTC3220 18 channel LED Driver

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Message-ID: <202601122335.DZgiMBky-lkp@intel.com>
Date: Tue, 13 Jan 2026 00:38:18 +0800
From: kernel test robot <lkp@...el.com>
To: Edelweise Escala <edelweise.escala@...log.com>,
	Lee Jones <lee@...nel.org>, Pavel Machek <pavel@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>
Cc: oe-kbuild-all@...ts.linux.dev, linux-leds@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	Edelweise Escala <edelweise.escala@...log.com>
Subject: Re: [PATCH v2 2/2] leds: ltc3220: Add Support for LTC3220 18 channel
 LED Driver

Hi Edelweise,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 8856d7fe1758937ac528770f552ec58c388c255b]

url:    https://github.com/intel-lab-lkp/linux/commits/Edelweise-Escala/dt-bindings-leds-Add-LTC3220-18-channel-LED-Driver/20260112-170223
base:   8856d7fe1758937ac528770f552ec58c388c255b
patch link:    https://lore.kernel.org/r/20260112-ltc3220-driver-v2-2-d043058fc4df%40analog.com
patch subject: [PATCH v2 2/2] leds: ltc3220: Add Support for LTC3220 18 channel LED Driver
config: sh-allmodconfig (https://download.01.org/0day-ci/archive/20260112/202601122335.DZgiMBky-lkp@intel.com/config)
compiler: sh4-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260112/202601122335.DZgiMBky-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601122335.DZgiMBky-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/leds/leds-ltc3220.c:348:12: warning: 'ltc3220_resume' defined but not used [-Wunused-function]
     348 | static int ltc3220_resume(struct device *dev)
         |            ^~~~~~~~~~~~~~
>> drivers/leds/leds-ltc3220.c:340:12: warning: 'ltc3220_suspend' defined but not used [-Wunused-function]
     340 | static int ltc3220_suspend(struct device *dev)
         |            ^~~~~~~~~~~~~~~


vim +/ltc3220_resume +348 drivers/leds/leds-ltc3220.c

   339	
 > 340	static int ltc3220_suspend(struct device *dev)
   341	{
   342		struct i2c_client *client = to_i2c_client(dev);
   343		struct ltc3220_state *ltc3220_state = i2c_get_clientdata(client);
   344	
   345		return ltc3220_shutdown(ltc3220_state);
   346	}
   347	
 > 348	static int ltc3220_resume(struct device *dev)
   349	{
   350		struct i2c_client *client = to_i2c_client(dev);
   351		struct ltc3220_state *ltc3220_state = i2c_get_clientdata(client);
   352	
   353		return ltc3220_resume_from_shutdown(ltc3220_state);
   354	}
   355	

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