naming IIO_IN_DIFF in-in

[Michael Hennerich <michael.hennerich@analog.com>]

Hi Jonathan,

I wonder if naming IIO_IN_DIFF in-in is really a good idea.
Declaring the attribute in a conventional fashion doesn't work.

static IIO_DEVICE_ATTR(in-in_scale_available, S_IRUGO, \
ad7793_show_scale_available, NULL, 0);

static struct attribute *ad7793_attributes[] =3D {
&iio_dev_attr_sampling_frequency.dev_attr.attr,
&iio_const_attr_sampling_frequency_available.dev_attr.attr,
&iio_dev_attr_in-in_scale_available.dev_attr.attr,
NULL
};

drivers/staging/iio/adc/ad7793.c:681: error: expected =91=3D=92, =91,=92,=
 =91;=92,=20
=91asm=92 or =91__attribute__=92 before =91-=92 token
drivers/staging/iio/adc/ad7793.c:688: error: =91iio_dev_attr_in=92=20
undeclared here (not in a function)
drivers/staging/iio/adc/ad7793.c:688: error: =91in_scale_available=92=20
undeclared here (not in a function)

--=20
Greetings,
Michael

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