Re: [PATCH v12 3/3] Input: Add TouchNetix axiom i2c touchscreen driver

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

Hi Kamel,

kernel test robot noticed the following build errors:

[auto build test ERROR on dtor-input/next]
[also build test ERROR on dtor-input/for-linus robh/for-next krzk-dt/for-next linus/master v6.10-rc1 next-20240529]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Kamel-Bouhara/dt-bindings-vendor-prefixes-Add-TouchNetix-AS/20240529-171328
base:   https://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git next
patch link:    https://lore.kernel.org/r/20240529091004.107256-4-kamel.bouhara%40bootlin.com
patch subject: [PATCH v12 3/3] Input: Add TouchNetix axiom i2c touchscreen driver
config: x86_64-randconfig-103-20240531 (https://download.01.org/0day-ci/archive/20240531/202405311035.5QZSREJv-lkp@intel.com/config)
compiler: gcc-13 (Ubuntu 13.2.0-4ubuntu3) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240531/202405311035.5QZSREJv-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202405311035.5QZSREJv-lkp@intel.com/

All errors (new ones prefixed by >>):

   ld: drivers/input/touchscreen/touchnetix_axiom.o: in function `axiom_handle_events':
>> drivers/input/touchscreen/touchnetix_axiom.c:473:(.text+0x245f): undefined reference to `crc16'


vim +473 drivers/input/touchscreen/touchnetix_axiom.c

   442	
   443	/*
   444	 * Validates the crc and demultiplexes the axiom reports to the appropriate
   445	 * report handler
   446	 */
   447	static int axiom_handle_events(struct axiom_data *ts)
   448	{
   449		struct input_dev *input_dev = ts->input_dev;
   450		u8 *report_data = ts->rx_buf;
   451		struct device *dev = ts->dev;
   452		u16 crc_report;
   453		u8 *crc_bytes;
   454		u16 crc_calc;
   455		int error;
   456		u8 len;
   457	
   458		error = axiom_read(ts, AXIOM_REPORT_USAGE_ID, 0, report_data, ts->max_report_len);
   459		if (error)
   460			return error;
   461	
   462		len = (report_data[0] & AXIOM_COMMS_REPORT_LEN_MASK) << 1;
   463		if (len <= 2) {
   464			dev_err(dev, "Zero length report discarded.\n");
   465			return -ENODATA;
   466		}
   467	
   468		/* Validate the report CRC */
   469		crc_bytes = &report_data[len];
   470	
   471		crc_report = get_unaligned_le16(crc_bytes - 2);
   472		/* Length is in 16 bit words and remove the size of the CRC16 itself */
 > 473		crc_calc = crc16(0, report_data, (len - 2));
   474	
   475		if (crc_calc != crc_report) {
   476			dev_err(dev,
   477				"CRC mismatch! Expected: %#x, Calculated CRC: %#x.\n",
   478				crc_report, crc_calc);
   479			return -EINVAL;
   480		}
   481	
   482		switch (report_data[1]) {
   483		case AXIOM_USAGE_2DCTS_REPORT_ID:
   484			if (axiom_process_u41_report(ts, &report_data[1])) {
   485				input_mt_sync_frame(input_dev);
   486				input_sync(input_dev);
   487			}
   488			break;
   489	
   490		case AXIOM_USAGE_2AUX_REPORT_ID:
   491			/* This is an aux report (force) */
   492			axiom_process_u46_report(ts, &report_data[1]);
   493			input_mt_sync(input_dev);
   494			input_sync(input_dev);
   495			break;
   496	
   497		case AXIOM_USAGE_2HB_REPORT_ID:
   498			/* This is a heartbeat report */
   499			break;
   500		default:
   501			return -EINVAL;
   502		}
   503	
   504		return 0;
   505	}
   506	

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