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git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
docs: iio: ad4062: Add GPIO Controller support
Explains the GPIO controller support with emphasis on the mask
depending on which GPs are exposed.
Signed-off-by: Jorge Marques <jorge.marques@analog.com>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
authored by
Jorge Marques
and committed by
Jonathan Cameron
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Documentation/iio/ad4062.rst
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Documentation/iio/ad4062.rst
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- GP0: Is assigned the role of Threshold Either signal.
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- GP1: Is assigned the role of Data Ready signal.
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If the property ``gpio-controller`` is present in the devicetree, then the GPO
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not present in the ``interrupt-names`` is exposed as a GPO.
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Device attributes
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=================
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···
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- Set the hysteresis value for the maximum threshold.
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* - ``thresh_rising_value``
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- Set the maximum threshold value.
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GPO controller support
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======================
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The device supports using GP0 and GP1 as GPOs. If the devicetree contains the
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node ``gpio-controller```, the device is marked as a GPIO controller and the
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GPs not listed in ``interrupt-names`` are exposed as a GPO. The GPIO index
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matches the pin name, so if GP0 is not exposed but GP1 is, index 0 is masked
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out and only index 1 can be set.