On 02/10/17 02:05, Linus Walleij wrote:

On Sun, Sep 17, 2017 at 11:39 AM, Linus Walleij
[off-list ref] wrote:

quoted

- The MFD Silicon Motion SM501 is a special case. It dynamically
   spawns an I2C bus off the MFD using sm501_create_subdev().
   We use an approach to dynamically create a machine descriptor
   table and attach this to the "SM501-LOW" or "SM501-HIGH"
   gpiochip. We use chip-local offsets to grab the right lines.
   We can get rid of two local static inline helpers as part
   of this refactoring.

(...)

quoted

SM501 users: requesting Tested-by on this patch.

Paging Simtec (if it reaches anyone), Vincent Sanders,
Teddy Wang at Silicon Motion:

I'm fairly sure Simtec is not currently active. See below.
I have no idea if the SM501 is even available for current designs.

Does any of you have an "Anubis" board so you can test GPIO
on this board before/after this patch and see if it checks out right?

I guess it's this board:
http://www.simtec.co.uk/products/BBD20EUROA/

I think that's fairly close.
We did have a couple of other designs done for clients, but they may
not have been available to the general public.

Does anyone know of a commercially obtainable product using
SM501 with reasonable mainline Linux support so I can test it myself?

Getting a bit desperate...

At the moment I have no time to go through the boxes of ex-Simtec stuff
that I still have... quite a lot of my old Simtec stuff has already been
recycled as it has been over five years since leaving.

Yours,
Linus Walleij

-- 
Ben Dooks				http://www.codethink.co.uk/
Senior Engineer				Codethink - Providing Genius