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Date:   Wed, 12 Jul 2023 05:05:45 +0800
From:   kernel test robot <lkp@...el.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org, Mark Brown <broonie@...nel.org>
Subject: drivers/input/touchscreen/edt-ft5x06.c:156:35: error: variable has
 incomplete type 'const struct regmap_config'

Hi Geert,

FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   3f01e9fed8454dcd89727016c3e5b2fbb8f8e50c
commit: 70a640c0efa7667453c3911b13335304ce46ad8b regmap: REGMAP_KUNIT should not select REGMAP
date:   9 weeks ago
config: s390-randconfig-r034-20230711 (https://download.01.org/0day-ci/archive/20230712/202307120543.B9WVQ1NL-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce: (https://download.01.org/0day-ci/archive/20230712/202307120543.B9WVQ1NL-lkp@intel.com/reproduce)

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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202307120543.B9WVQ1NL-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/input/touchscreen/edt-ft5x06.c:25:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/s390/include/asm/io.h:75:
   include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     547 |         val = __raw_readb(PCI_IOBASE + addr);
         |                           ~~~~~~~~~~ ^
   include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     560 |         val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
      37 | #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
         |                                                           ^
   include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
     102 | #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
         |                                                      ^
   In file included from drivers/input/touchscreen/edt-ft5x06.c:25:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/s390/include/asm/io.h:75:
   include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     573 |         val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
      35 | #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
         |                                                           ^
   include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
     115 | #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
         |                                                      ^
   In file included from drivers/input/touchscreen/edt-ft5x06.c:25:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/s390/include/asm/io.h:75:
   include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     584 |         __raw_writeb(value, PCI_IOBASE + addr);
         |                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     594 |         __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
   include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     604 |         __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
   include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     692 |         readsb(PCI_IOBASE + addr, buffer, count);
         |                ~~~~~~~~~~ ^
   include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     700 |         readsw(PCI_IOBASE + addr, buffer, count);
         |                ~~~~~~~~~~ ^
   include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     708 |         readsl(PCI_IOBASE + addr, buffer, count);
         |                ~~~~~~~~~~ ^
   include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     717 |         writesb(PCI_IOBASE + addr, buffer, count);
         |                 ~~~~~~~~~~ ^
   include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     726 |         writesw(PCI_IOBASE + addr, buffer, count);
         |                 ~~~~~~~~~~ ^
   include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     735 |         writesl(PCI_IOBASE + addr, buffer, count);
         |                 ~~~~~~~~~~ ^
>> drivers/input/touchscreen/edt-ft5x06.c:156:35: error: variable has incomplete type 'const struct regmap_config'
     156 | static const struct regmap_config edt_ft5x06_i2c_regmap_config = {
         |                                   ^
   drivers/input/touchscreen/edt-ft5x06.c:156:21: note: forward declaration of 'struct regmap_config'
     156 | static const struct regmap_config edt_ft5x06_i2c_regmap_config = {
         |                     ^
   drivers/input/touchscreen/edt-ft5x06.c:292:35: error: variable has incomplete type 'const struct regmap_config'
     292 | static const struct regmap_config edt_M06_i2c_regmap_config = {
         |                                   ^
   drivers/input/touchscreen/edt-ft5x06.c:156:21: note: forward declaration of 'struct regmap_config'
     156 | static const struct regmap_config edt_ft5x06_i2c_regmap_config = {
         |                     ^
>> drivers/input/touchscreen/edt-ft5x06.c:896:3: error: call to undeclared function 'regmap_exit'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     896 |                 regmap_exit(tsdata->regmap);
         |                 ^
   drivers/input/touchscreen/edt-ft5x06.c:896:3: note: did you mean 'regmap_write'?
   include/linux/regmap.h:1716:19: note: 'regmap_write' declared here
    1716 | static inline int regmap_write(struct regmap *map, unsigned int reg,
         |                   ^
>> drivers/input/touchscreen/edt-ft5x06.c:897:20: error: call to undeclared function 'regmap_init_i2c'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     897 |                 tsdata->regmap = regmap_init_i2c(client,
         |                                  ^
   drivers/input/touchscreen/edt-ft5x06.c:1154:19: error: call to undeclared function 'regmap_init_i2c'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    1154 |         tsdata->regmap = regmap_init_i2c(client, &edt_ft5x06_i2c_regmap_config);
         |                          ^
   drivers/input/touchscreen/edt-ft5x06.c:1360:2: error: call to undeclared function 'regmap_exit'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    1360 |         regmap_exit(tsdata->regmap);
         |         ^
   12 warnings and 6 errors generated.


vim +156 drivers/input/touchscreen/edt-ft5x06.c

b1d2a3ecb9cbf9 Franklin S Cooper Jr 2015-10-16  155  
9dfd9708ffba1e Dario Binacchi       2023-04-02 @156  static const struct regmap_config edt_ft5x06_i2c_regmap_config = {
9dfd9708ffba1e Dario Binacchi       2023-04-02  157  	.reg_bits = 8,
9dfd9708ffba1e Dario Binacchi       2023-04-02  158  	.val_bits = 8,
9dfd9708ffba1e Dario Binacchi       2023-04-02  159  };
43c4d13e901a8f Simon Budig          2012-07-24  160  

:::::: The code at line 156 was first introduced by commit
:::::: 9dfd9708ffba1e7969af5e4ecda660151146de98 Input: edt-ft5x06 - convert to use regmap API

:::::: TO: Dario Binacchi <dario.binacchi@...rulasolutions.com>
:::::: CC: Dmitry Torokhov <dmitry.torokhov@...il.com>

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

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