Re: [PATCH V3 2/7] rtc: Add support for the Loongson-2K/LS7A RTC

[kernel test robot <lkp@intel.com>]

Hi Binbin,

kernel test robot noticed the following build warnings:

[auto build test WARNING on abelloni/rtc-next]
[also build test WARNING on robh/for-next linus/master v6.3-rc6 next-20230412]
[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/Binbin-Zhou/dt-bindings-rtc-Subdivision-of-LS2X-RTC-compatible/20230413-155906
base:   https://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux.git rtc-next
patch link:    https://lore.kernel.org/r/09f381f445cfbcf857845f61d10238452037b2e8.1681370153.git.zhoubinbin%40loongson.cn
patch subject: [PATCH V3 2/7] rtc: Add support for the Loongson-2K/LS7A RTC
config: arm64-allyesconfig (https://download.01.org/0day-ci/archive/20230414/202304140202.URh2nrLx-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 9638da200e00bd069e6dd63604e14cbafede9324)
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 arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://github.com/intel-lab-lkp/linux/commit/30ef4691d0ab95241315bf9ba7cf20b7d549b071
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Binbin-Zhou/dt-bindings-rtc-Subdivision-of-LS2X-RTC-compatible/20230413-155906
        git checkout 30ef4691d0ab95241315bf9ba7cf20b7d549b071
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/rtc/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304140202.URh2nrLx-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/rtc/rtc-ls2x.c:276:25: warning: cast to smaller integer type 'enum ls2x_pm_offset' from 'const void *' [-Wvoid-pointer-to-enum-cast]
           priv->pm_base = regs - (enum ls2x_pm_offset)device_get_match_data(dev);
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   1 warning generated.


vim +276 drivers/rtc/rtc-ls2x.c

   249	
   250	static int ls2x_rtc_probe(struct platform_device *pdev)
   251	{
   252		int ret;
   253		void __iomem *regs;
   254		struct ls2x_rtc_priv *priv;
   255		struct device *dev = &pdev->dev;
   256	
   257		priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
   258		if (!priv)
   259			return -ENOMEM;
   260	
   261		regs = devm_platform_ioremap_resource(pdev, 0);
   262		if (IS_ERR(regs))
   263			return dev_err_probe(dev, PTR_ERR(regs),
   264					     "devm_platform_ioremap_resource failed\n");
   265	
   266		priv->regmap = devm_regmap_init_mmio(dev, regs,
   267						     &ls2x_rtc_regmap_config);
   268		if (IS_ERR(priv->regmap))
   269			return dev_err_probe(dev, PTR_ERR(priv->regmap),
   270					     "devm_regmap_init_mmio failed\n");
   271	
   272		device_init_wakeup(dev, 1);
   273		spin_lock_init(&priv->lock);
   274		platform_set_drvdata(pdev, priv);
   275	
 > 276		priv->pm_base = regs - (enum ls2x_pm_offset)device_get_match_data(dev);
   277	
   278		if (has_acpi_companion(dev))
   279			acpi_install_fixed_event_handler(ACPI_EVENT_RTC,
   280							 ls2x_rtc_handler, priv);
   281	
   282		priv->rtcdev = devm_rtc_allocate_device(dev);
   283		if (IS_ERR(priv->rtcdev))
   284			return dev_err_probe(dev, PTR_ERR(priv->rtcdev),
   285					     "devm_rtc_allocate_device failed\n");
   286	
   287		priv->rtcdev->ops = &ls2x_rtc_ops;
   288		priv->rtcdev->range_min = RTC_TIMESTAMP_BEGIN_2000;
   289		priv->rtcdev->range_max = RTC_TIMESTAMP_END_2099;
   290	
   291		priv->irq = platform_get_irq(pdev, 0);
   292		if (priv->irq < 0)
   293			return dev_err_probe(dev, priv->irq, "platform_get_irq failed\n");
   294	
   295		ret = devm_request_irq(dev, priv->irq, ls2x_rtc_isr,
   296				       IRQF_TRIGGER_RISING, "ls2x-alarm", priv);
   297		if (ret < 0)
   298			return dev_err_probe(dev, ret, "Unable to request irq %d\n",
   299					     priv->irq);
   300	
   301		return devm_rtc_register_device(priv->rtcdev);
   302	}
   303	

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