linux-kernel - Re: [PATCH v2 4/5] drivers: iio: adc: LTC2499 support

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Date:   Fri, 2 Sep 2022 04:00:05 +0800
From:   kernel test robot <lkp@...el.com>
To:     Ciprian Regus <ciprian.regus@...log.com>, jic23@...nel.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        Ciprian Regus <ciprian.regus@...log.com>
Subject: Re: [PATCH v2 4/5] drivers: iio: adc: LTC2499 support

Hi Ciprian,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on jic23-iio/togreg]
[also build test ERROR on robh/for-next linus/master v6.0-rc3 next-20220901]
[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/Ciprian-Regus/dt-bindings-iio-adc-Add-docs-for-LTC2499/20220901-202115
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
config: hexagon-randconfig-r003-20220901 (https://download.01.org/0day-ci/archive/20220902/202209020359.vCYzjn4X-lkp@intel.com/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project c55b41d5199d2394dd6cdb8f52180d8b81d809d4)
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/intel-lab-lkp/linux/commit/08ff9ae09bfde86fc512e13a4ea2af894e4aa442
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Ciprian-Regus/dt-bindings-iio-adc-Add-docs-for-LTC2499/20220901-202115
        git checkout 08ff9ae09bfde86fc512e13a4ea2af894e4aa442
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/iio/adc/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

>> drivers/iio/adc/ltc2497.c:60:12: error: call to undeclared function 'get_unaligned_be24'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
                           *val = (get_unaligned_be24(st->data.d8) >> st->sub_lsb)
                                   ^
   drivers/iio/adc/ltc2497.c:122:4: error: field designator 'name' does not refer to any field in type 'const struct ltc2497_chip_info'
                   .name = NULL,
                    ^
   drivers/iio/adc/ltc2497.c:126:4: error: field designator 'name' does not refer to any field in type 'const struct ltc2497_chip_info'
                   .name = "ltc2499",
                    ^
   3 errors generated.


vim +/get_unaligned_be24 +60 drivers/iio/adc/ltc2497.c

    34	
    35	static int ltc2497_result_and_measure(struct ltc2497core_driverdata *ddata,
    36					      u8 address, int *val)
    37	{
    38		struct ltc2497_driverdata *st =
    39			container_of(ddata, struct ltc2497_driverdata, common_ddata);
    40		int ret;
    41	
    42		if (val) {
    43			if (st->recv_size == 3)
    44				ret = i2c_master_recv(st->client, (char *)&st->data.d8, st->recv_size);
    45			else
    46				ret = i2c_master_recv(st->client, (char *)&st->data.d32, st->recv_size);
    47	
    48			if (ret < 0) {
    49				dev_err(&st->client->dev, "i2c_master_recv failed\n");
    50				return ret;
    51			}
    52	
    53			/*
    54			 * The data format is 16/24 bit 2s complement, but with an upper sign bit on the
    55			 * resolution + 1 position, which is set for positive values only. Given this
    56			 * bit's value, subtracting BIT(resolution + 1) from the ADC's result is
    57			 * equivalent to a sign extension.
    58			 */
    59			if (st->recv_size == 3) {
  > 60				*val = (get_unaligned_be24(st->data.d8) >> st->sub_lsb)
    61					- BIT(ddata->chip_info->resolution + 1);
    62			} else {
    63				*val = (be32_to_cpu(st->data.d32) >> st->sub_lsb)
    64					- BIT(ddata->chip_info->resolution + 1);
    65			}
    66		}
    67	
    68		ret = i2c_smbus_write_byte(st->client,
    69					   LTC2497_ENABLE | address);
    70		if (ret)
    71			dev_err(&st->client->dev, "i2c transfer failed: %pe\n",
    72				ERR_PTR(ret));
    73		return ret;
    74	}
    75	

-- 
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