On Thu, Jun 14, 2012 at 12:47:13PM +0000, Hebbar, Gururaja wrote: > On Tue, Apr 10, 2012 at 20:36:23, Thierry Reding wrote: > > 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). 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 and patch 4 adds an API to request a PWM device using a lookup > > table registered by board setup code. They are supposed to eventually > > replace pwm_request() and allow to get rid of the global namespace. The > > device tree support code does not use the global namespace. > > > ..snip.. > ..snip.. > > > > > The whole series is based on the linux-next tree from 20120405. I think > > I've addressed all of the concerns raised in the first five versions. I > > have also pushed this version of the series to the PWM subsystem > > repository[1]. > > > > Thierry > > > > [0]: http://git.pengutronix.de/?p=imx/linux-2.6.git;a=shortlog;h=refs/heads/pwmlib > > [1]: http://gitorious.org/linux-pwm/linux-pwm/trees/pwm-v6 > > > > Sascha Hauer (4): > > pwm: Add PWM framework support > > ARM i.MX: Move i.MX pwm driver to pwm framework > > ARM Samsung: Move s3c pwm driver to pwm framework > > ARM vt8500: Move vt8500 pwm driver to pwm framework > > > > Shawn Guo (1): > > pwm: add pwm-mxs support > > > > Simon Que (1): > > ARM: tegra: Fix PWM clock programming > > > > Thierry Reding (11): > > pwm: Allow chips to support multiple PWMs > > pwm: Add debugfs interface > > pwm: Add table-based lookup for static mappings > > pwm: Add device tree support > > ARM: tegra: Provide clock for only one PWM controller > > pwm: Add NVIDIA Tegra SoC support > > pwm: tegra: Add device tree support > > pwm: Move Blackfin PWM driver to PWM framework > > pwm: Move PXA PWM driver to PWM framework > > pwm-backlight: Add rudimentary device tree support > > pwm: Take over maintainership of the PWM subsystem > > > > I am planning to add PWM support in Linux for TI AM335x SOC. > I am taking your new PWM framework as reference. > > I see a lot of ack's for the patches. I see that you are maintaining these patches in a separate repo. > However, I couldn't find any of these > patches in the mainline kernel (including recent 3.5-rc2). > Do you have any plans for pushing this again to mainline kernel. Yes, as a matter of fact I'm in the process of getting the series ready for inclusion into linux-next. I expect them to go into 3.6. Thierry
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