[jarkko-tpmdd:master 3/3] drivers/char/tpm/tpm_tis_synquacer.c:89:12: warning: incompatible pointer to integer conversion passing 'const u8 *' (aka 'const unsigned char *') to parameter of type 'u8' (aka 'unsigned char')

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

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd.git master
head:   b6e0cdb87bf37357489de1069d55bd59f008daeb
commit: b6e0cdb87bf37357489de1069d55bd59f008daeb [3/3] tpm: Remove read16/read32/write32 calls from tpm_tis_phy_ops
config: riscv-randconfig-r042-20220409 (https://download.01.org/0day-ci/archive/20220410/202204100151.9v5nSRu6-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 256c6b0ba14e8a7ab6373b61b7193ea8c0a3651c)
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 riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd.git/commit/?id=b6e0cdb87bf37357489de1069d55bd59f008daeb
        git remote add jarkko-tpmdd git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd.git
        git fetch --no-tags jarkko-tpmdd master
        git checkout b6e0cdb87bf37357489de1069d55bd59f008daeb
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash drivers/char/tpm/

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 >>):

   In file included from drivers/char/tpm/tpm_tis_synquacer.c:14:
   In file included from drivers/char/tpm/tpm.h:28:
   include/linux/tpm_eventlog.h:167:6: warning: variable 'mapping_size' set but not used [-Wunused-but-set-variable]
           int mapping_size;
               ^
   drivers/char/tpm/tpm_tis_synquacer.c:43:9: warning: unused variable 'result_le32' [-Wunused-variable]
           __le32 result_le32;
                  ^
   drivers/char/tpm/tpm_tis_synquacer.c:45:6: warning: unused variable 'result32' [-Wunused-variable]
           u32 result32;
               ^
   drivers/char/tpm/tpm_tis_synquacer.c:42:9: warning: unused variable 'result_le16' [-Wunused-variable]
           __le16 result_le16;
                  ^
   drivers/char/tpm/tpm_tis_synquacer.c:44:6: warning: unused variable 'result16' [-Wunused-variable]
           u16 result16;
               ^
>> drivers/char/tpm/tpm_tis_synquacer.c:89:12: warning: incompatible pointer to integer conversion passing 'const u8 *' (aka 'const unsigned char *') to parameter of type 'u8' (aka 'unsigned char') [-Wint-conversion]
                   iowrite8(&value[3], phy->iobase + addr + 3);
                            ^~~~~~~~~
   include/asm-generic/io.h:744:32: note: passing argument to parameter 'value' here
   static inline void iowrite8(u8 value, volatile void __iomem *addr)
                                  ^
   drivers/char/tpm/tpm_tis_synquacer.c:90:12: warning: incompatible pointer to integer conversion passing 'const u8 *' (aka 'const unsigned char *') to parameter of type 'u8' (aka 'unsigned char') [-Wint-conversion]
                   iowrite8(&value[2], phy->iobase + addr + 2);
                            ^~~~~~~~~
   include/asm-generic/io.h:744:32: note: passing argument to parameter 'value' here
   static inline void iowrite8(u8 value, volatile void __iomem *addr)
                                  ^
   drivers/char/tpm/tpm_tis_synquacer.c:91:12: warning: incompatible pointer to integer conversion passing 'const u8 *' (aka 'const unsigned char *') to parameter of type 'u8' (aka 'unsigned char') [-Wint-conversion]
                   iowrite8(&value[1], phy->iobase + addr + 1);
                            ^~~~~~~~~
   include/asm-generic/io.h:744:32: note: passing argument to parameter 'value' here
   static inline void iowrite8(u8 value, volatile void __iomem *addr)
                                  ^
   drivers/char/tpm/tpm_tis_synquacer.c:92:12: warning: incompatible pointer to integer conversion passing 'const u8 *' (aka 'const unsigned char *') to parameter of type 'u8' (aka 'unsigned char') [-Wint-conversion]
                   iowrite8(&value[0], phy->iobase + addr);
                            ^~~~~~~~~
   include/asm-generic/io.h:744:32: note: passing argument to parameter 'value' here
   static inline void iowrite8(u8 value, volatile void __iomem *addr)
                                  ^
   drivers/char/tpm/tpm_tis_synquacer.c:73:9: warning: unused variable 'result_le32' [-Wunused-variable]
           __le32 result_le32;
                  ^
   drivers/char/tpm/tpm_tis_synquacer.c:74:6: warning: unused variable 'result16' [-Wunused-variable]
           u16 result16;
               ^
   drivers/char/tpm/tpm_tis_synquacer.c:72:9: warning: unused variable 'result_le16' [-Wunused-variable]
           __le16 result_le16;
                  ^
   drivers/char/tpm/tpm_tis_synquacer.c:75:6: warning: unused variable 'result32' [-Wunused-variable]
           u32 result32;
               ^
   13 warnings generated.


vim +89 drivers/char/tpm/tpm_tis_synquacer.c

    66	
    67	static int tpm_tis_synquacer_write_bytes(struct tpm_tis_data *data, u32 addr,
    68						 u16 len, const u8 *value,
    69						 enum tpm_tis_io_mode io_mode)
    70	{
    71		struct tpm_tis_synquacer_phy *phy = to_tpm_tis_tcg_phy(data);
    72		__le16 result_le16;
    73		__le32 result_le32;
    74		u16 result16;
    75		u32 result32;
    76	
    77		switch (io_mode) {
    78		case TPM_TIS_PHYS_8:
    79			while (len--)
    80				iowrite8(*value++, phy->iobase + addr);
    81			break;
    82		case TPM_TIS_PHYS_16:
    83			return -EINVAL;
    84		case TPM_TIS_PHYS_32:
    85			/*
    86			 * Due to the limitation of SPI controller on SynQuacer,
    87			 * 16/32 bits access must be done in byte-wise and descending order.
    88			 */
  > 89			iowrite8(&value[3], phy->iobase + addr + 3);
    90			iowrite8(&value[2], phy->iobase + addr + 2);
    91			iowrite8(&value[1], phy->iobase + addr + 1);
    92			iowrite8(&value[0], phy->iobase + addr);
    93			break;
    94		}
    95	
    96		return 0;
    97	}
    98	

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