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ff73e27801TAS2770 includes an ADC which reports the chip's die temperature. As per the datasheet, the temperature in degrees Celsius is derived by taking the raw value stored in the ADC's registers, dividing by 16, then subtracting 93. Create and register a hwmon device to expose the chip's die temperature to the hwmon interface. The ADC is shut down during software shutdown mode, and its registers are initialised to 0 on reset. This means that the die temperature will read -93 *C until the chip has been fully powered up at least once (e.g. the PCM its attached to is opened). Once the chip is put into software shutdown again, the ADC will also shut down. The last value sampled before this happens will persist in the ADC's registers. Co-developed-by: Martin Povišer <povik+lin@cutebit.org> Signed-off-by: Martin Povišer <povik+lin@cutebit.org> Signed-off-by: James Calligeros <jcalligeros99@gmail.com> Link: https://patch.msgid.link/20250406-apple-codec-changes-v5-7-50a00ec850a3@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org> |
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| README | ||
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 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.