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Configure the clock controller to set an alternate clock for the CPU when it receives an IRQ during LP1 (system suspend). Specifically, use clk_m (the crystal) rather than clk_s (a 32KHz clock). Such an IRQ will be the LP1 wake event. This reduces the amount of time taken to resume from LP1. NVIDIA's downstream kernel executes this code on both Tegra30 and Tegra124, so it appears OK to make this change unconditionally. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.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
``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.