[xilinx-xlnx:xlnx_rebase_v5.4 942/1768] drivers/mtd/spi-nor/spi-nor.c:5196:14: error: implicit declaration of function 'of_get_next_parent'

[kernel test robot]

tree:   https://github.com/Xilinx/linux-xlnx xlnx_rebase_v5.4
head:   abafefebd1f1e040eef74e4ab571ea08bf745641
commit: 24bcc7359bdd609cedf0a715d77dc39e4ad782db [942/1768] mtd: spi-nor: Added axi-qspi support in spi-nor framework
config: x86_64-randconfig-r013-20211214 (https://download.01.org/0day-ci/archive/20211218/202112181002.zy1XXyLw-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project b6a2ddb6c8ac29412b1361810972e15221fa021c)
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
        # https://github.com/Xilinx/linux-xlnx/commit/24bcc7359bdd609cedf0a715d77dc39e4ad782db
        git remote add xilinx-xlnx https://github.com/Xilinx/linux-xlnx
        git fetch --no-tags xilinx-xlnx xlnx_rebase_v5.4
        git checkout 24bcc7359bdd609cedf0a715d77dc39e4ad782db
        # 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=x86_64 SHELL=/bin/bash drivers/mtd/spi-nor/

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

All error/warnings (new ones prefixed by >>):

   drivers/mtd/spi-nor/spi-nor.c:691:5: warning: variable 'code' set but not used [-Wunused-but-set-variable]
           u8 code;
              ^
   drivers/mtd/spi-nor/spi-nor.c:2741:9: warning: variable 'addr' set but not used [-Wunused-but-set-variable]
           loff_t addr = 0;
                  ^
>> drivers/mtd/spi-nor/spi-nor.c:5196:14: error: implicit declaration of function 'of_get_next_parent' [-Werror,-Wimplicit-function-declaration]
                                   np_spi = of_get_next_parent(np);
                                            ^
>> drivers/mtd/spi-nor/spi-nor.c:5196:12: warning: incompatible integer to pointer conversion assigning to 'struct device_node *' from 'int' [-Wint-conversion]
                                   np_spi = of_get_next_parent(np);
                                          ^ ~~~~~~~~~~~~~~~~~~~~~~
   drivers/mtd/spi-nor/spi-nor.c:5266:11: error: returning 'const struct flash_info *' from a function with result type 'struct flash_info *' discards qualifiers [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
                           return jinfo;
                                  ^~~~~
   drivers/mtd/spi-nor/spi-nor.c:5281:9: error: returning 'const struct flash_info *' from a function with result type 'struct flash_info *' discards qualifiers [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
           return info;
                  ^~~~
   drivers/mtd/spi-nor/spi-nor.c:5295:6: warning: unused variable 'is_dual' [-Wunused-variable]
           u32 is_dual;
               ^
   drivers/mtd/spi-nor/spi-nor.c:5294:22: warning: unused variable 'np_spi' [-Wunused-variable]
           struct device_node *np_spi;
                               ^
   5 warnings and 3 errors generated.


vim +/of_get_next_parent +5196 drivers/mtd/spi-nor/spi-nor.c

  5162	
  5163	static int spi_nor_set_addr_width(struct spi_nor *nor)
  5164	{
  5165		struct device_node *np = spi_nor_get_flash_node(nor);
  5166		struct device_node *np_spi;
  5167		if (nor->addr_width) {
  5168			/* already configured from SFDP */
  5169		} else if (nor->info->addr_width) {
  5170			nor->addr_width = nor->info->addr_width;
  5171		} else if (nor->mtd.size > 0x1000000) {
  5172	#ifdef CONFIG_OF
  5173			np_spi = of_get_next_parent(np);
  5174			if (of_property_match_string(np_spi, "compatible",
  5175						     "xlnx,zynq-qspi-1.0") >= 0) {
  5176				int status;
  5177	
  5178				nor->addr_width = 3;
  5179				nor->params.set_4byte(nor, false);
  5180				status = read_ear(nor, (struct flash_info *)nor->info);
  5181				if (status < 0)
  5182					dev_warn(nor->dev, "failed to read ear reg\n");
  5183				else
  5184					nor->curbank = status & EAR_SEGMENT_MASK;
  5185			} else {
  5186	#endif
  5187				/*
  5188				 * enable 4-byte addressing if the
  5189				 * device exceeds 16MiB
  5190				 */
  5191				nor->addr_width = 4;
  5192				if (JEDEC_MFR(nor->info) == SNOR_MFR_SPANSION ||
  5193				    nor->info->flags & SPI_NOR_4B_OPCODES) {
  5194					spi_nor_set_4byte_opcodes(nor);
  5195				} else {
> 5196					np_spi = of_get_next_parent(np);
  5197					if (of_property_match_string(np_spi,
  5198								     "compatible",
  5199								     "xlnx,xps-spi-2.00.a") >= 0) {
  5200						nor->addr_width = 3;
  5201						nor->params.set_4byte(nor, false);
  5202					} else {
  5203						nor->params.set_4byte(nor, true);
  5204						if (nor->isstacked) {
  5205							nor->spi->master->flags |=
  5206								SPI_MASTER_U_PAGE;
  5207							nor->params.set_4byte(nor, true);
  5208							nor->spi->master->flags &=
  5209								~SPI_MASTER_U_PAGE;
  5210						}
  5211					}
  5212				}
  5213	#ifdef CONFIG_OF
  5214			}
  5215	#endif
  5216		} else {
  5217			nor->addr_width = 3;
  5218		}
  5219	
  5220		if (nor->addr_width > SPI_NOR_MAX_ADDR_WIDTH) {
  5221			dev_err(nor->dev, "address width is too large: %u\n",
  5222				nor->addr_width);
  5223			return -EINVAL;
  5224		}
  5225	
  5226		/* Set 4byte opcodes when possible. */
  5227		if (nor->addr_width == 4 && nor->flags & SNOR_F_4B_OPCODES &&
  5228		    !(nor->flags & SNOR_F_HAS_4BAIT))
  5229			spi_nor_set_4byte_opcodes(nor);
  5230	
  5231		return 0;
  5232	}
  5233	

---
0-DAY CI Kernel Test Service, Intel Corporation
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