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    SubjectRe: [PATCH v5 00/12] Support for AM33xx PWM Subsystem
    On Tue, Nov 27, 2012 at 02:18:05PM +0530, Philip, Avinash wrote:
    > 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
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