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32596b101f
The PICO-IMX7D SoM has the usual power supply configuration using output sw1a of PF3000 PMIC, which was defined in downstream derivative of linux-imx (see link) in the sources for "Android Things" devkit. It is required to support CPU frequency scaling. Map the respective "cpu-supply" nodes of each core to sw1a of the PMIC. Enabling them causes cpufreq-dt, and imx-thermal drivers to probe successfully, and CPU frequency scaling to function. Link: https://android.googlesource.com/platform/hardware/bsp/kernel/nxp/imx-v4.1/+/o-iot-preview-5/arch/arm/boot/dts/imx7d-pico.dtsi#849 Cc: Fabio Estevam <festevam@gmail.com> Cc: Shawn Guo <shawnguo@kernel.org> Cc: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Lech Perczak <lech.perczak@gmail.com> Reviewed-by: Fabio Estevam <festevam@gmail.com> Signed-off-by: Shawn Guo <shawnguo@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 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.