[PATCH 4/4] ARM: Kirkwood: Add support for many Synology NAS devices

[Ian Campbell]

On Thu, 2014-02-06 at 17:01 +0100, Andrew Lunn wrote:
> Synology seem to build there devices like lego. They have two
> different RTC blocks. They have three different fan alarm blocks, four
> different led blocks, etc. And to build a product, the just select a
> group of blocks and put them together.
> 
> The board setup code which Ben Peddell wrote has a somewhat similar
> structure:
> 
> http://klightspeed.killerwolves.net/synology/linux-3.4-synology-0.1.patch
> 
> It has a set of functions which add platform devices. And a table
> driven piece of code which based on the product name calls these
> functions to add the needed platform devices. Take a look at the table
> to get a better idea of the re-use factor of the blocks.
> 
> In this DT version, i have a dtsi file for each function, and a dti
> file for each table entry.

At least some other platforms deal with this by having a baseline dtsi
where most things have status="disabled" and then a per-board .dts file
which contains status="okay" and perhaps any specific pin bindings etc.

See arch/arm/boot/dts/sun?i* for an example of this approach.

Ian.