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Date:   Wed, 20 May 2020 07:52:03 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Sebastian Reichel <sebastian.reichel@...labora.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Ahmet Inan <inan@...tec.de>,
        Martin Fuzzey <martin.fuzzey@...wbird.group>
Cc:     kbuild-all@...ts.01.org, linux-input@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel@...labora.com,
        Sebastian Reichel <sebastian.reichel@...labora.com>
Subject: Re: [PATCHv2 3/5] Input: EXC3000: add EXC80H60 and EXC80H84 support

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 <lkp@...el.com>

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/kbuild-all@lists.01.org

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