Re: [PATCH v4 2/5] phy: realtek: usb: Add driver for the Realtek SoC USB 2.0 PHY

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

Hi Stanley,

kernel test robot noticed the following build warnings:

[auto build test WARNING on usb/usb-testing]
[also build test WARNING on usb/usb-next usb/usb-linus robh/for-next linus/master v6.4-rc6 next-20230614]
[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/Stanley-Chang/phy-realtek-usb-Add-driver-for-the-Realtek-SoC-USB-2-0-PHY/20230614-173349
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
patch link:    https://lore.kernel.org/r/20230614092850.21460-2-stanley_chang%40realtek.com
patch subject: [PATCH v4 2/5] phy: realtek: usb: Add driver for the Realtek SoC USB 2.0 PHY
config: sparc-allyesconfig (https://download.01.org/0day-ci/archive/20230614/202306142352.e4eBd3HX-lkp@intel.com/config)
compiler: sparc64-linux-gcc (GCC) 12.3.0
reproduce (this is a W=1 build):
        mkdir -p ~/bin
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git remote add usb https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
        git fetch usb usb-testing
        git checkout usb/usb-testing
        b4 shazam https://lore.kernel.org/r/20230614092850.21460-2-stanley_chang@realtek.com
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.3.0 ~/bin/make.cross W=1 O=build_dir ARCH=sparc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.3.0 ~/bin/make.cross W=1 O=build_dir ARCH=sparc SHELL=/bin/bash drivers/phy/realtek/

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/202306142352.e4eBd3HX-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/phy/realtek/phy-rtk-usb2.c: In function 'parse_phy_data':
>> drivers/phy/realtek/phy-rtk-usb2.c:1229:25: warning: variable 'phy_cfg' set but not used [-Wunused-but-set-variable]
    1229 |         struct phy_cfg *phy_cfg;
         |                         ^~~~~~~


vim +/phy_cfg +1229 drivers/phy/realtek/phy-rtk-usb2.c

  1224	
  1225	static int parse_phy_data(struct rtk_phy *rtk_phy)
  1226	{
  1227		struct device *dev = rtk_phy->dev;
  1228		struct device_node *node;
> 1229		struct phy_cfg *phy_cfg;
  1230		struct phy_parameter *phy_parameter;
  1231		int ret = 0;
  1232		int index;
  1233	
  1234		node = dev->of_node;
  1235		phy_cfg = rtk_phy->phy_cfg;
  1236	
  1237		rtk_phy->phy_parameter = devm_kzalloc(dev, sizeof(struct phy_parameter) *
  1238							rtk_phy->num_phy, GFP_KERNEL);
  1239		if (!rtk_phy->phy_parameter)
  1240			return -ENOMEM;
  1241	
  1242		for (index = 0; index < rtk_phy->num_phy; index++) {
  1243			phy_parameter = &((struct phy_parameter *)rtk_phy->phy_parameter)[index];
  1244	
  1245			phy_parameter->phy_reg.reg_wrap_vstatus = of_iomap(dev->of_node, 0);
  1246			phy_parameter->phy_reg.reg_gusb2phyacc0 = of_iomap(dev->of_node, 1) + index;
  1247			phy_parameter->phy_reg.vstatus_index = index;
  1248	
  1249			if (of_property_read_bool(node, "realtek,inverse-hstx-sync-clock"))
  1250				phy_parameter->inverse_hstx_sync_clock = true;
  1251			else
  1252				phy_parameter->inverse_hstx_sync_clock = false;
  1253	
  1254			if (of_property_read_u32_index(node, "realtek,driving-level",
  1255						       index, &phy_parameter->driving_level))
  1256				phy_parameter->driving_level = DEFAULT_DC_DRIVING_VALUE;
  1257	
  1258			if (of_property_read_u32_index(node, "realtek,driving-compensate",
  1259						       index, &phy_parameter->driving_compensate))
  1260				phy_parameter->driving_compensate = 0;
  1261	
  1262			if (of_property_read_u32_index(node, "realtek,disconnection-compensate",
  1263						       index, &phy_parameter->disconnection_compensate))
  1264				phy_parameter->disconnection_compensate = 0;
  1265	
  1266			get_phy_data_by_efuse(rtk_phy, phy_parameter, index);
  1267	
  1268			update_dc_driving_level(rtk_phy, phy_parameter);
  1269	
  1270			update_hs_clk_select(rtk_phy, phy_parameter);
  1271		}
  1272	
  1273		return ret;
  1274	}
  1275	

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