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Matti Vaittinen
0be6a47ec4
The ad7476 driver supports ADCs which require a GPIO pin to be used to start conversion. The GPIO line status seems to be always toggled from a process context, either from the user-initiated "raw-read conversion", or from a threaded IRQ handler. Furthermore, these ICs are connected via SPI bus, which is usually implemented in a way that the access to the device can sleep. The GPIO here is toggled from the same context which is reading the results over SPI. Thus it seems very likely these GPIOs are toggled from a context which can sleep. Swap the gpiod_set_value() to gpiod_set_value_cansleep() accordinlgy. Suggested-by: Nuno Sá <noname.nuno@gmail.com> Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com> Reviewed-by: Nuno Sá <nuno.sa@analog.com> Reviewed-by: Andy Shevchenko <andy@kernel.org> Link: https://patch.msgid.link/a2d4b77e9739662797a1609f436b7f9807e1ac67.1754901948.git.mazziesaccount@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
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https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.