* Arnd Bergmann wrote:

On Wednesday 22 February 2012, Thierry Reding wrote:

quoted

This patch series adds very rudimentary device-tree support for PWM
devices. With all of these patches applied (plus one board-specific
patch that is not included), I'm able to control the backlight on the
device I'm working on using the sysfs interface provided by the pwm-bl
driver and the backlight class.

This series is based on Sascha Hauer's series of patches[0] to add a
generic PWM framework. The first patch in this series is taken from
Sascha's branch, while the second patch enables each PWM chip to provide
multiple PWM devices (the Blackfin and PXA drivers have been ported to
the framework for reference). When this series is ready I think it would
be best to merge patches 1 and 2. Currently a global namespace is still
provided to keep backwards-compatibility with the legacy PWM API. In
order to achieve this, the number of global PWM devices is limited to
1024. However, patch 2 introduces per-chip indexing of PWM devices in
the core, so it should be easy to add an API to request a PWM device on
a per-chip basis and get rid of the global namespace eventually. The
device tree support code does not use the global namespace.

Hi Thierry,

I've just had a chance to look at your series and I think this looks
very good overall, great work!

I probably wouldn't bother merging patches 1 and 2 as you listed
in the TODO section, in order to keep the authorship of each
part obvious.

Okay, no problem.

Thierry
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