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Date:   Thu, 19 Jan 2023 17:42:53 +0800
From:   kernel test robot <yujie.liu@intel.com>
To:     Claudiu Beznea <claudiu.beznea@microchip.com>
CC:     <oe-kbuild-all@lists.linux.dev>, <linux-kernel@vger.kernel.org>,
        "Linus Walleij" <linus.walleij@linaro.org>
Subject: drivers/pinctrl/pinctrl-at91.c:1650:12: warning: unused function
 'at91_gpio_suspend'
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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   c1649ec55708ae42091a2f1bca1ab49ecd722d55
commit: a575207583676298f3999d41d86d81f7172fe950 pinctrl: at91: move gpio suspend/resume calls to driver's context
date:   5 months ago
config: arm-randconfig-r046-20230118 (https://download.01.org/0day-ci/archive/20230119/202301190231.oWPtSJ5A-lkp@intel.com/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 4196ca3278f78c6e19246e54ab0ecb364e37d66a)
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 arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a575207583676298f3999d41d86d81f7172fe950
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout a575207583676298f3999d41d86d81f7172fe950
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/pinctrl/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <yujie.liu@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/pinctrl/pinctrl-at91.c:1650:12: warning: unused function 'at91_gpio_suspend' [-Wunused-function]
   static int at91_gpio_suspend(struct device *dev)
              ^
>> drivers/pinctrl/pinctrl-at91.c:1668:12: warning: unused function 'at91_gpio_resume' [-Wunused-function]
   static int at91_gpio_resume(struct device *dev)
              ^
   2 warnings generated.

Please check if the functions need to be guarded with a config.

vim +/at91_gpio_suspend +1650 drivers/pinctrl/pinctrl-at91.c

647f8d94a4e69d Ludovic Desroches 2013-03-08  1649  
a5752075836762 Claudiu Beznea    2022-08-31 @1650  static int at91_gpio_suspend(struct device *dev)
647f8d94a4e69d Ludovic Desroches 2013-03-08  1651  {
a5752075836762 Claudiu Beznea    2022-08-31  1652  	struct at91_gpio_chip *at91_chip = dev_get_drvdata(dev);
a5752075836762 Claudiu Beznea    2022-08-31  1653  	void __iomem *pio = at91_chip->regbase;
647f8d94a4e69d Ludovic Desroches 2013-03-08  1654  
a5752075836762 Claudiu Beznea    2022-08-31  1655  	at91_chip->backups = readl_relaxed(pio + PIO_IMR);
a5752075836762 Claudiu Beznea    2022-08-31  1656  	writel_relaxed(at91_chip->backups, pio + PIO_IDR);
a5752075836762 Claudiu Beznea    2022-08-31  1657  	writel_relaxed(at91_chip->wakeups, pio + PIO_IER);
647f8d94a4e69d Ludovic Desroches 2013-03-08  1658  
a5752075836762 Claudiu Beznea    2022-08-31  1659  	if (!at91_chip->wakeups)
a5752075836762 Claudiu Beznea    2022-08-31  1660  		clk_disable_unprepare(at91_chip->clock);
795f9953eaccf9 Boris Brezillon   2013-12-15  1661  	else
647f8d94a4e69d Ludovic Desroches 2013-03-08  1662  		printk(KERN_DEBUG "GPIO-%c may wake for %08x\n",
a5752075836762 Claudiu Beznea    2022-08-31  1663  		       'A' + at91_chip->id, at91_chip->wakeups);
a5752075836762 Claudiu Beznea    2022-08-31  1664  
a5752075836762 Claudiu Beznea    2022-08-31  1665  	return 0;
647f8d94a4e69d Ludovic Desroches 2013-03-08  1666  }
647f8d94a4e69d Ludovic Desroches 2013-03-08  1667  
a5752075836762 Claudiu Beznea    2022-08-31 @1668  static int at91_gpio_resume(struct device *dev)
647f8d94a4e69d Ludovic Desroches 2013-03-08  1669  {
a5752075836762 Claudiu Beznea    2022-08-31  1670  	struct at91_gpio_chip *at91_chip = dev_get_drvdata(dev);
a5752075836762 Claudiu Beznea    2022-08-31  1671  	void __iomem *pio = at91_chip->regbase;
647f8d94a4e69d Ludovic Desroches 2013-03-08  1672  
a5752075836762 Claudiu Beznea    2022-08-31  1673  	if (!at91_chip->wakeups)
a5752075836762 Claudiu Beznea    2022-08-31  1674  		clk_prepare_enable(at91_chip->clock);
647f8d94a4e69d Ludovic Desroches 2013-03-08  1675  
a5752075836762 Claudiu Beznea    2022-08-31  1676  	writel_relaxed(at91_chip->wakeups, pio + PIO_IDR);
a5752075836762 Claudiu Beznea    2022-08-31  1677  	writel_relaxed(at91_chip->backups, pio + PIO_IER);
647f8d94a4e69d Ludovic Desroches 2013-03-08  1678  
a5752075836762 Claudiu Beznea    2022-08-31  1679  	return 0;
647f8d94a4e69d Ludovic Desroches 2013-03-08  1680  }
647f8d94a4e69d Ludovic Desroches 2013-03-08  1681  

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