On Wed, Nov 28, 2012 at 19:51:01, Thierry Reding wrote:

On Tue, Nov 27, 2012 at 02:18:05PM +0530, Philip, Avinash wrote:

quoted

In AM33xx PWM sub modules like ECAP, EHRPWM & EQEP are  integrated to
PWM subsystem. All these submodules shares the resources (clock) & has
a clock gating register in PWM Subsystem. This patch series creates a
parent PWM Subsystem driver to handle access synchronization of shared
resources & clock gating from PWM Subsystem configuration space.
Also Device tree nodes populated to support parent child relation
between PWMSS, ECAP & EHRPWM submodules.
In addition EHRPWM module requires explicit clock gating from control
module & is handled by patch #6 & 7.

As suggested by  Thierry for handling clock gating for PWM submodules
should handle with a global function. This requires config space
handling done independent from driver and is done at parent driver.

So the parent<->child relation adopted to handle
1. pm runtime synchronization
2. PWM subsystem common config space clock gating for PWM submodules.

Patches supports
- Driver support for parent child relation handled patch #1
- HWMOD data correction in EPWMSS at patch #2
- Parent child in HWMOD relation handled at patch #3
- Optional EHRPWM tb clock in patch #6
- Support for TBCLK clock gating at patch #7.
- Device tree binding support handled in patch #4,8 
- Pinctrl support in patch #5 & 9.
- DT node populated in patch #10 ,11 & 12.

This patch series based on omap_dt/for_3.8/dts_part2 and tested
on am335x-evm & am335x-evmsk.

This patch series will come under 3 subsystem basically. But sent
it in single patch series to have a clearer picture of why the
OMAP subsystem changes required.

Patches come under PWM (1,4,5,7,8,9)
Patches come under OMAP (2,3,6)
Patches come under DT (10,11,12).

It depends on [1]
1. https://gitorious.org/linux-pwm/linux-pwm/commit/83af24027b3df1af5c5a9aa9adcdcfeb3429d3be
pwm: Device tree support for PWM polarity

Changes since v3:
	- Rebased on top of omap_dt/for_3.8/dts_part2
	- Add pwm backlight for am335xevm_sk
	- Moved tipwmss.h to pwm-tipwmss.h

Philip, Avinash (12):
  PWMSS: Add PWM Subsystem driver for parent<->child relationship
  ARM: OMAP: AM33xx hwmod: Corrects PWM subsystem HWMOD entries
  ARM: OMAP: AM33xx hwmod: Add parent-child relationship for PWM
    subsystem
  pwm: tiecap: Add device-tree binding
  pwm: pwm-tiecap: pinctrl support
  ARM: AM33XX: clk: Add clock node for EHRPWM TBCLK
  pwm: pwm-tiehrpwm: Adding TBCLK gating support.
  pwm: tiehrpwm: Add device-tree binding
  pwm: pwm-tiehrpwm: pinctrl support
  ARM: dts: AM33XX: Add PWMSS device tree nodes
  ARM: dts: AM33XX: Add PWM backlight DT data to am335x-evm
  ARM: dts: AM33XX: Add PWM backlight DT data to am335x-evmsk

Patches 1, 4, 5, 7, 8 and 9 applied, with a minor fixup to the subject
line of patch 1. Thanks.

Thierry,
Thanks for applying the PWM patches.
I will follow up with OMAP community for other patches.

Paul/Benoit,

Is there any way to get HWMOD and DT patches getting accepted in 3.8?
Or should I wait and send rebased patch based on 3.8-rc1?

Thanks
Avinash

Thierry