[PATCH v4 2/2] iio: adc: Add Nuvoton MA35D1 EADC driver

[Victor Chernyakin]

> +static int ma35d1_adc_parse_channels(struct iio_dev *indio_dev,
> +				     struct device *dev)
> +{
> +	DECLARE_BITMAP(used_single_inputs, MA35D1_EADC_MAX_EXT_CHANNELS);
> +	DECLARE_BITMAP(used_diff_pairs, MA35D1_EADC_NUM_DIFF_PAIRS);
> +	DECLARE_BITMAP(used_regs, MA35D1_EADC_MAX_EXT_CHANNELS);
> +	struct iio_chan_spec *channels;
> +	unsigned int scan_index;
> +	int num_channels;
> +	int ret;
> +
> +	bitmap_zero(used_single_inputs, MA35D1_EADC_MAX_EXT_CHANNELS);
> +	bitmap_zero(used_diff_pairs, MA35D1_EADC_NUM_DIFF_PAIRS);
> +	bitmap_zero(used_regs, MA35D1_EADC_MAX_EXT_CHANNELS);

The bitmaps can be initialized directly:

DECLARE_BITMAP(used_single_inputs, MA35D1_EADC_MAX_EXT_CHANNELS) = { };
DECLARE_BITMAP(used_diff_pairs, MA35D1_EADC_NUM_DIFF_PAIRS) = { };
DECLARE_BITMAP(used_regs, MA35D1_EADC_MAX_EXT_CHANNELS) = { };

There are several drivers in IIO that do it this way, you can check by
grepping for DECLARE_BITMAP.