[linux-sunxi] [PATCH] spi: dts: sun4i: Add support for inter-word wait cycles using the SPI Wait Clock Register

Marcus Weseloh mweseloh42 at gmail.com
Fri Nov 20 08:45:48 PST 2015

2015-11-20 17:12 GMT+01:00 Rob Herring <robh at kernel.org>:
> On Fri, Nov 20, 2015 at 02:56:34PM +0100, Marcus Weseloh wrote:
>> > (and the wdelay should
>> > arguably be a core-spi thing, not a sunxi thing, but that's a separate
>> > discussion)
>> I've been thinking about that, but it seemed to big a change to
>> attempt with my limited kernel hacking experience.
> It is not any bigger. You just need to document it in the core binding.
> It would still be read by the drivers using it.

Julien, Rob: thanks for your comments! Ok, I will make the following changes:

- remove "sun4i,spi-wdelay" from the sun4i binding and add the
property to the spi-bus.txt binding instead
- remove the comment about the additional 3 cycles from the documentation
- modfy the spi-sun4i driver to take care of the minimum 3 cycle period

Does that sound right?

And maybe I could also use a more descriptive name for the property,
maybe "spi-word-wait-cycles"?



More information about the linux-arm-kernel mailing list