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iio:adc:ti_am335x_adc Fix buffered mode by identifying as software buffer. 

Whilst this part has a hardware buffer, the identifcation that IIO cares
about is the userspace facing end.  It this case we push individual elements
from the hardware fifo into the software interface (specifically a kfifo)
rather than providing direct reads through to a hardware buffer
(as we still do in the sca3000 for example).

Technically the original specification as a hardware buffer could be
considered wrong, but it didn't matter until the patch listed below.

Result is that any attempt to enable the buffer will return -EINVAL

Fixes: 225d59adf1 ("iio: Specify supported modes for buffers")
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
hifive-unleashed-5.1
Jonathan Cameron 2016-01-01 18:05:34 +00:00
parent fa34e6dd44
commit 9d0be85d4e
1 changed files with 1 additions and 1 deletions
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2
drivers/iio/adc/ti_am335x_adc.c
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@ -289,7 +289,7 @@ static int tiadc_iio_buffered_hardware_setup(struct iio_dev *indio_dev,
goto error_kfifo_free;
indio_dev->setup_ops = setup_ops;
indio_dev->modes |= INDIO_BUFFER_HARDWARE;
indio_dev->modes |= INDIO_BUFFER_SOFTWARE;
return 0;