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The AMS AS7331 is a UV light sensor with three channels: UVA, UVB and UVC (also known as deep UV and referenced as DUV in the iio core). Its internal structure and forming blocks are practically identical to the ones the AS73211 contains: API, internal DAC, I2C interface and registers, measurement modes, number of channels and pinout. The only difference between them is the photodiodes used to acquire light, which means that only some modifications are required to add support for the AS7331 in the existing driver. The temperature channel is identical for both devices and only the channel modifiers of the IIO_INTENSITY channels need to account for the device type. The scale values have been obtained from the chapter "7.5 Transfer Function" of the official datasheet[1] for the configuration chosen as basis (Nclk = 1024 and GAIN = 1). Those values keep the units from the datasheet (nW/cm^2), as opposed to the units used for the AS73211 (nW/m^2). Add a new device-specific data structure to account for the device differences: channel types and scale of LSB per channel. [1] https://ams.com/documents/20143/9106314/AS7331_DS001047_4-00.pdf Tested-by: Christian Eggers <ceggers@arri.de> Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> |
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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
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text 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.