tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   324c92e5e0ee0e993bdb106fac407846ed677f6b
commit: 50d35aa8c15f7210fe76de64b1940100b588bcae phy: cadence: salvo: add salvo phy driver
date:   1 year, 1 month ago
config: x86_64-randconfig-a014-20210602 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project d41cb6bb2607fa5c7a9df2b3dab361353657d225)
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 x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=50d35aa8c15f7210fe76de64b1940100b588bcae
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 50d35aa8c15f7210fe76de64b1940100b588bcae
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/phy/cadence/phy-cadence-salvo.c:213:6: warning: variable 'value' set but not used [-Wunused-but-set-variable]
           u16 value;
               ^
   1 warning generated.


vim +/value +213 drivers/phy/cadence/phy-cadence-salvo.c

   207	
   208	static int cdns_salvo_phy_power_on(struct phy *phy)
   209	{
   210		struct cdns_salvo_phy *salvo_phy = phy_get_drvdata(phy);
   211		struct cdns_salvo_data *data = salvo_phy->data;
   212		int ret, i;
 > 213		u16 value;
   214	
   215		ret = clk_prepare_enable(salvo_phy->clk);
   216		if (ret)
   217			return ret;
   218	
   219		for (i = 0; i < data->init_sequence_length; i++) {
   220			struct cdns_reg_pairs *reg_pair = data->init_sequence_val + i;
   221	
   222			cdns_salvo_write(salvo_phy, reg_pair->off, reg_pair->val);
   223		}
   224	
   225		/* RXDET_IN_P3_32KHZ, Receiver detect slow clock enable */
   226		value = cdns_salvo_read(salvo_phy, TB_ADDR_TX_RCVDETSC_CTRL);
   227		value |= RXDET_IN_P3_32KHZ;
   228		cdns_salvo_write(salvo_phy, TB_ADDR_TX_RCVDETSC_CTRL,
   229				 RXDET_IN_P3_32KHZ);
   230	
   231		udelay(10);
   232	
   233		return ret;
   234	}
   235	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org