Re: [PATCH] iio: adc: ad7887: invert/rework external ref logic

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Hi Alexandru,

I love your patch! Yet something to improve:

[auto build test ERROR on iio/togreg]
[also build test ERROR on linux/master linus/master v5.9-rc7 next-20201001]
[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]

url:    https://github.com/0day-ci/linux/commits/Alexandru-Ardelean/iio-adc-ad7887-invert-rework-external-ref-logic/20201001-220829
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
config: c6x-randconfig-r034-20200930 (attached as .config)
compiler: c6x-elf-gcc (GCC) 9.3.0
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/0day-ci/linux/commit/98dbf5fa747aac2e245826d8c6cd34b087aeaa27
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Alexandru-Ardelean/iio-adc-ad7887-invert-rework-external-ref-logic/20201001-220829
        git checkout 98dbf5fa747aac2e245826d8c6cd34b087aeaa27
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=c6x 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

   drivers/iio/adc/ad7887.c: In function 'ad7887_probe':
>> drivers/iio/adc/ad7887.c:276:22: error: 'struct ad7887_platform_data' has no member named 'use_onchip_ref'
     276 |  if (!pdata || !pdata->use_onchip_ref)
         |                      ^~

vim +276 drivers/iio/adc/ad7887.c

6fe8135fccd66ae drivers/staging/iio/adc/ad7887_core.c Jonathan Cameron   2011-05-18  234  
fc52692c49969ec drivers/iio/adc/ad7887.c              Greg Kroah-Hartman 2012-12-21  235  static int ad7887_probe(struct spi_device *spi)
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  236  {
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  237  	struct ad7887_platform_data *pdata = spi->dev.platform_data;
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  238  	struct ad7887_state *st;
82429e0d33ece55 drivers/iio/adc/ad7887.c              Sachin Kamat       2013-07-23  239  	struct iio_dev *indio_dev;
fce7c3eac7d4ca7 drivers/staging/iio/adc/ad7887.c      Lars-Peter Clausen 2012-11-05  240  	uint8_t mode;
bf5d2613c9083b8 drivers/staging/iio/adc/ad7887_core.c Lars-Peter Clausen 2012-11-05  241  	int ret;
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  242  
82429e0d33ece55 drivers/iio/adc/ad7887.c              Sachin Kamat       2013-07-23  243  	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
f39e086adcbdb95 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2011-05-18  244  	if (indio_dev == NULL)
f39e086adcbdb95 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2011-05-18  245  		return -ENOMEM;
f39e086adcbdb95 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2011-05-18  246  
f39e086adcbdb95 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2011-05-18  247  	st = iio_priv(indio_dev);
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  248  
98dbf5fa747aac2 drivers/iio/adc/ad7887.c              Alexandru Ardelean 2020-10-01  249  	st->reg = devm_regulator_get_optional(&spi->dev, "vref");
98dbf5fa747aac2 drivers/iio/adc/ad7887.c              Alexandru Ardelean 2020-10-01  250  	if (IS_ERR(st->reg)) {
98dbf5fa747aac2 drivers/iio/adc/ad7887.c              Alexandru Ardelean 2020-10-01  251  		if (PTR_ERR(st->reg) != -ENODEV)
82429e0d33ece55 drivers/iio/adc/ad7887.c              Sachin Kamat       2013-07-23  252  			return PTR_ERR(st->reg);
bf5d2613c9083b8 drivers/staging/iio/adc/ad7887_core.c Lars-Peter Clausen 2012-11-05  253  
98dbf5fa747aac2 drivers/iio/adc/ad7887.c              Alexandru Ardelean 2020-10-01  254  		st->reg = NULL;
98dbf5fa747aac2 drivers/iio/adc/ad7887.c              Alexandru Ardelean 2020-10-01  255  	}
98dbf5fa747aac2 drivers/iio/adc/ad7887.c              Alexandru Ardelean 2020-10-01  256  
98dbf5fa747aac2 drivers/iio/adc/ad7887.c              Alexandru Ardelean 2020-10-01  257  	if (st->reg) {
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  258  		ret = regulator_enable(st->reg);
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  259  		if (ret)
82429e0d33ece55 drivers/iio/adc/ad7887.c              Sachin Kamat       2013-07-23  260  			return ret;
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  261  	}
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  262  
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  263  	st->chip_info =
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  264  		&ad7887_chip_info_tbl[spi_get_device_id(spi)->driver_data];
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  265  
f39e086adcbdb95 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2011-05-18  266  	spi_set_drvdata(spi, indio_dev);
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  267  	st->spi = spi;
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  268  
f39e086adcbdb95 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2011-05-18  269  	indio_dev->name = spi_get_device_id(spi)->name;
6fe8135fccd66ae drivers/staging/iio/adc/ad7887_core.c Jonathan Cameron   2011-05-18  270  	indio_dev->info = &ad7887_info;
f39e086adcbdb95 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2011-05-18  271  	indio_dev->modes = INDIO_DIRECT_MODE;
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  272  
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  273  	/* Setup default message */
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  274  
fce7c3eac7d4ca7 drivers/staging/iio/adc/ad7887.c      Lars-Peter Clausen 2012-11-05  275  	mode = AD7887_PM_MODE4;
fce7c3eac7d4ca7 drivers/staging/iio/adc/ad7887.c      Lars-Peter Clausen 2012-11-05 @276  	if (!pdata || !pdata->use_onchip_ref)
fce7c3eac7d4ca7 drivers/staging/iio/adc/ad7887.c      Lars-Peter Clausen 2012-11-05  277  		mode |= AD7887_REF_DIS;
fce7c3eac7d4ca7 drivers/staging/iio/adc/ad7887.c      Lars-Peter Clausen 2012-11-05  278  	if (pdata && pdata->en_dual)
fce7c3eac7d4ca7 drivers/staging/iio/adc/ad7887.c      Lars-Peter Clausen 2012-11-05  279  		mode |= AD7887_DUAL;
fce7c3eac7d4ca7 drivers/staging/iio/adc/ad7887.c      Lars-Peter Clausen 2012-11-05  280  
fce7c3eac7d4ca7 drivers/staging/iio/adc/ad7887.c      Lars-Peter Clausen 2012-11-05  281  	st->tx_cmd_buf[0] = AD7887_CH_AIN0 | mode;
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  282  
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  283  	st->xfer[0].rx_buf = &st->data[0];
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  284  	st->xfer[0].tx_buf = &st->tx_cmd_buf[0];
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  285  	st->xfer[0].len = 2;
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  286  
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  287  	spi_message_init(&st->msg[AD7887_CH0]);
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  288  	spi_message_add_tail(&st->xfer[0], &st->msg[AD7887_CH0]);
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  289  
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  290  	if (pdata && pdata->en_dual) {
fce7c3eac7d4ca7 drivers/staging/iio/adc/ad7887.c      Lars-Peter Clausen 2012-11-05  291  		st->tx_cmd_buf[2] = AD7887_CH_AIN1 | mode;
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  292  
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  293  		st->xfer[1].rx_buf = &st->data[0];
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  294  		st->xfer[1].tx_buf = &st->tx_cmd_buf[2];
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  295  		st->xfer[1].len = 2;
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  296  
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  297  		st->xfer[2].rx_buf = &st->data[2];
fce7c3eac7d4ca7 drivers/staging/iio/adc/ad7887.c      Lars-Peter Clausen 2012-11-05  298  		st->xfer[2].tx_buf = &st->tx_cmd_buf[0];
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  299  		st->xfer[2].len = 2;
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  300  
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  301  		spi_message_init(&st->msg[AD7887_CH0_CH1]);
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  302  		spi_message_add_tail(&st->xfer[1], &st->msg[AD7887_CH0_CH1]);
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  303  		spi_message_add_tail(&st->xfer[2], &st->msg[AD7887_CH0_CH1]);
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  304  
fce7c3eac7d4ca7 drivers/staging/iio/adc/ad7887.c      Lars-Peter Clausen 2012-11-05  305  		st->xfer[3].rx_buf = &st->data[2];
fce7c3eac7d4ca7 drivers/staging/iio/adc/ad7887.c      Lars-Peter Clausen 2012-11-05  306  		st->xfer[3].tx_buf = &st->tx_cmd_buf[2];
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  307  		st->xfer[3].len = 2;
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  308  
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  309  		spi_message_init(&st->msg[AD7887_CH1]);
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  310  		spi_message_add_tail(&st->xfer[3], &st->msg[AD7887_CH1]);
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  311  
b0ec7a44393e0d7 drivers/iio/adc/ad7887.c              Beniamin Bia       2019-11-25  312  		indio_dev->channels = st->chip_info->dual_channels;
b0ec7a44393e0d7 drivers/iio/adc/ad7887.c              Beniamin Bia       2019-11-25  313  		indio_dev->num_channels = st->chip_info->num_dual_channels;
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  314  	} else {
b0ec7a44393e0d7 drivers/iio/adc/ad7887.c              Beniamin Bia       2019-11-25  315  		indio_dev->channels = st->chip_info->channels;
b0ec7a44393e0d7 drivers/iio/adc/ad7887.c              Beniamin Bia       2019-11-25  316  		indio_dev->num_channels = st->chip_info->num_channels;
596d06097f7843e drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2011-05-18  317  	}
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  318  
65dd3d3d7a9bca6 drivers/staging/iio/adc/ad7887.c      Lars-Peter Clausen 2012-11-05  319  	ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
65dd3d3d7a9bca6 drivers/staging/iio/adc/ad7887.c      Lars-Peter Clausen 2012-11-05  320  			&ad7887_trigger_handler, &ad7887_ring_setup_ops);
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  321  	if (ret)
f39e086adcbdb95 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2011-05-18  322  		goto error_disable_reg;
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  323  
26d25ae3f0d8ffe drivers/staging/iio/adc/ad7887_core.c Jonathan Cameron   2011-09-02  324  	ret = iio_device_register(indio_dev);
26d25ae3f0d8ffe drivers/staging/iio/adc/ad7887_core.c Jonathan Cameron   2011-09-02  325  	if (ret)
26d25ae3f0d8ffe drivers/staging/iio/adc/ad7887_core.c Jonathan Cameron   2011-09-02  326  		goto error_unregister_ring;
26d25ae3f0d8ffe drivers/staging/iio/adc/ad7887_core.c Jonathan Cameron   2011-09-02  327  
26d25ae3f0d8ffe drivers/staging/iio/adc/ad7887_core.c Jonathan Cameron   2011-09-02  328  	return 0;
26d25ae3f0d8ffe drivers/staging/iio/adc/ad7887_core.c Jonathan Cameron   2011-09-02  329  error_unregister_ring:
65dd3d3d7a9bca6 drivers/staging/iio/adc/ad7887.c      Lars-Peter Clausen 2012-11-05  330  	iio_triggered_buffer_cleanup(indio_dev);
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  331  error_disable_reg:
bf5d2613c9083b8 drivers/staging/iio/adc/ad7887_core.c Lars-Peter Clausen 2012-11-05  332  	if (st->reg)
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  333  		regulator_disable(st->reg);
f39e086adcbdb95 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2011-05-18  334  
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  335  	return ret;
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  336  }
2b4756aa36909a9 drivers/staging/iio/adc/ad7887_core.c Michael Hennerich  2010-11-22  337  

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