mainlining shenanigans
b6891523fe
With the recently introduced omap clkctrl module binding, we can start moving omap hwmod data to device tree and drivers from arch/arm/mach-omap2. To start doing this, let's introduce a device tree binding for TI sysc interconnect target module hardware. The sysc manages module clocks, idlemodes and interconnect level resets. Each interconnect target module can have one or more child devices connected to it. TI sysc interconnect target module hardware is independent of the interconnect. It is used at least with TI L3 interconnect (Arteris NoC) and TI L4 interconnect (Sonics s3220). The sysc is mostly used for interaction between module and PRCM. It participates in the OCP Disconnect Protocol but other than that is mostly indepenent of the interconnect. As all the features may not be supported for a given sysc module, we need to use device tree configuration for the revision of the interconnect target module. Note that the interconnect target module control registers are always sprinked at varying locations in the unused address space of the first child device IP block. To avoid device tree reg conflicts, the sysc device provides ranges for it's children. For a non-intrusive transition from static hwmod data to using device tree defined TI interconnect target module binding, we can keep things working with static hwmod data if device tree property "ti,hwmods" is specified for the the interconnect target module. Note that additional properties for sysc capabilities will be added later on. For now, we can already use this binding for interconnect target modules that do not have any child device drivers available. This allows us to idle the unused interconnect target modules during init without the need for legacy hwmod platform data for doing it. Cc: Benoît Cousson <bcousson@baylibre.com> Cc: Dave Gerlach <d-gerlach@ti.com> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: Liam Girdwood <lgirdwood@gmail.com> Cc: Mark Brown <broonie@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mauro Carvalho Chehab <mchehab@kernel.org> Cc: Nishanth Menon <nm@ti.com> Cc: Matthijs van Duin <matthijsvanduin@gmail.com> Cc: Paul Walmsley <paul@pwsan.com> Cc: Peter Ujfalusi <peter.ujfalusi@ti.com> Cc: Sakari Ailus <sakari.ailus@iki.fi> Cc: Suman Anna <s-anna@ti.com> Cc: Tero Kristo <t-kristo@ti.com> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Tony Lindgren <tony@atomide.com> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.