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c371af6869
There's a hack at the driver that selects a different table for a BYT tablet, which sets the maximum frequency to 320 MHz, instead of 400 MHz. After looking at the Intel Aero Yocto's version from: https://download.01.org/aero/deb/pool/main/l/linux-4.4.76-aero-1.3/ It was noticed that this depends on an Android-specific modprobe parameter, which uses a macro (INTEL_MID_BOARD) from this file: arch/x86/include/asm/spid.h >From the comments there, it looks like this macro parses a variable passed at boot time: cmdline : androidboot.spid=vend:cust:manu:plat:prod:hard The devices in question are identified there as: INTEL_BYT_TABLET_BLK_PRO = 0x0000 INTEL_BYT_TABLET_BLK_ENG = 0x8000 Well, this is something that we don't have upstream. So, without further details about that, we can't really parse it. If we ever end supporting those devices with the upstream driver, this patch can be reverted and the device can be detected via DMI (or maybe via PCI ID?). Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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.