Hi Sebastian,

I love your patch! Perhaps something to improve:

[auto build test WARNING on input/next]
[also build test WARNING on v5.7-rc6 next-20200519]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    
https://github.com/0day-ci/linux/commits/Sebastian-Reichel/EXC3000-Updates/20200520-023207
base:   https://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git next
config: openrisc-randconfig-r024-20200519 (attached as .config)
compiler: or1k-linux-gcc (GCC) 9.3.0
reproduce:
        wget 
https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O 
~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross 
ARCH=openrisc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <[email protected]>

All warnings (new ones prefixed by >>, old ones prefixed by <<):

drivers/input/touchscreen/exc3000.c:48:13: error: 'SZ_4K' undeclared here (not 
in a function)
48 |   .max_xy = SZ_4K - 1,
|             ^~~~~
drivers/input/touchscreen/exc3000.c:52:13: error: 'SZ_16K' undeclared here (not 
in a function)
52 |   .max_xy = SZ_16K - 1,
|             ^~~~~~
In file included from arch/openrisc/include/asm/bitops.h:25,
from include/linux/bitops.h:29,
from drivers/input/touchscreen/exc3000.c:10:
drivers/input/touchscreen/exc3000.c: In function 'exc3000_read_frame':
drivers/input/touchscreen/exc3000.c:99:25: warning: comparison between pointer 
and integer
99 |  if (data->info->max_xy == SZ_16K - 1)
|                         ^~
include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var'
58 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : 
__trace_if_value(cond))
|                                                    ^~~~
>> drivers/input/touchscreen/exc3000.c:99:2: note: in expansion of macro 'if'
99 |  if (data->info->max_xy == SZ_16K - 1)
|  ^~
drivers/input/touchscreen/exc3000.c:99:25: warning: comparison between pointer 
and integer
99 |  if (data->info->max_xy == SZ_16K - 1)
|                         ^~
include/linux/compiler.h:58:61: note: in definition of macro '__trace_if_var'
58 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : 
__trace_if_value(cond))
|                                                             ^~~~
>> drivers/input/touchscreen/exc3000.c:99:2: note: in expansion of macro 'if'
99 |  if (data->info->max_xy == SZ_16K - 1)
|  ^~
drivers/input/touchscreen/exc3000.c:99:25: warning: comparison between pointer 
and integer
99 |  if (data->info->max_xy == SZ_16K - 1)
|                         ^~
include/linux/compiler.h:69:3: note: in definition of macro '__trace_if_value'
69 |  (cond) ?              |   ^~~~
include/linux/compiler.h:56:28: note: in expansion of macro '__trace_if_var'
56 | #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
|                            ^~~~~~~~~~~~~~
>> drivers/input/touchscreen/exc3000.c:99:2: note: in expansion of macro 'if'
99 |  if (data->info->max_xy == SZ_16K - 1)
|  ^~

vim +/if +99 drivers/input/touchscreen/exc3000.c

  > 10  #include <linux/bitops.h>
    11  #include <linux/device.h>
    12  #include <linux/i2c.h>
    13  #include <linux/input.h>
    14  #include <linux/input/mt.h>
    15  #include <linux/input/touchscreen.h>
    16  #include <linux/interrupt.h>
    17  #include <linux/module.h>
    18  #include <linux/of.h>
    19  #include <linux/timer.h>
    20  #include <asm/unaligned.h>
    21  
    22  #define EXC3000_NUM_SLOTS               10
    23  #define EXC3000_SLOTS_PER_FRAME         5
    24  #define EXC3000_LEN_FRAME               66
    25  #define EXC3000_LEN_POINT               10
    26  
    27  #define EXC3000_MT1_EVENT               0x06
    28  #define EXC3000_MT2_EVENT               0x18
    29  
    30  #define EXC3000_TIMEOUT_MS              100
    31  
    32  static const struct i2c_device_id exc3000_id[];
    33  
    34  struct eeti_dev_info {
    35          const char *name;
    36          int max_xy;
    37  };
    38  
    39  enum eeti_dev_id {
    40          EETI_EXC3000,
    41          EETI_EXC80H60,
    42          EETI_EXC80H84,
    43  };
    44  
    45  static struct eeti_dev_info exc3000_info[] = {
    46          [EETI_EXC3000] = {
    47                  .name = "EETI EXC3000 Touch Screen",
    48                  .max_xy = SZ_4K - 1,
    49          },
    50          [EETI_EXC80H60] = {
    51                  .name = "EETI EXC80H60 Touch Screen",
    52                  .max_xy = SZ_16K - 1,
    53          },
    54          [EETI_EXC80H84] = {
    55                  .name = "EETI EXC80H84 Touch Screen",
    56                  .max_xy = SZ_16K - 1,
    57          },
    58  };
    59  
    60  struct exc3000_data {
    61          struct i2c_client *client;
    62          const struct eeti_dev_info *info;
    63          struct input_dev *input;
    64          struct touchscreen_properties prop;
    65          struct timer_list timer;
    66          u8 buf[2 * EXC3000_LEN_FRAME];
    67  };
    68  
    69  static void exc3000_report_slots(struct input_dev *input,
    70                                   struct touchscreen_properties *prop,
    71                                   const u8 *buf, int num)
    72  {
    73          for (; num--; buf += EXC3000_LEN_POINT) {
    74                  if (buf[0] & BIT(0)) {
    75                          input_mt_slot(input, buf[1]);
    76                          input_mt_report_slot_state(input, 
MT_TOOL_FINGER, true);
    77                          touchscreen_report_pos(input, prop,
    78                                                 get_unaligned_le16(buf + 
2),
    79                                                 get_unaligned_le16(buf + 
4),
    80                                                 true);
    81                  }
    82          }
    83  }
    84  
    85  static void exc3000_timer(struct timer_list *t)
    86  {
    87          struct exc3000_data *data = from_timer(data, t, timer);
    88  
    89          input_mt_sync_frame(data->input);
    90          input_sync(data->input);
    91  }
    92  
    93  static int exc3000_read_frame(struct exc3000_data *data, u8 *buf)
    94  {
    95          struct i2c_client *client = data->client;
    96          u8 expected_event = EXC3000_MT1_EVENT;
    97          int ret;
    98  
  > 99          if (data->info->max_xy == SZ_16K - 1)
   100                  expected_event = EXC3000_MT2_EVENT;
   101  
   102          ret = i2c_master_send(client, "'", 2);
   103          if (ret < 0)
   104                  return ret;
   105  
   106          if (ret != 2)
   107                  return -EIO;
   108  
   109          ret = i2c_master_recv(client, buf, EXC3000_LEN_FRAME);
   110          if (ret < 0)
   111                  return ret;
   112  
   113          if (ret != EXC3000_LEN_FRAME)
   114                  return -EIO;
   115  
   116          if (get_unaligned_le16(buf) != EXC3000_LEN_FRAME)
   117                  return -EINVAL;
   118  
   119          if (buf[2] != expected_event)
   120                  return -EINVAL;
   121  
   122          return 0;
   123  }
   124  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/[email protected]

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