lkml.org 
[lkml]   [2012]   [Nov]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH v2 00/10] Support for AM33xx PWM Susbsytem
Date
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 #2 & 8.

Patch #4 & 5 submitted is a second revision as suggested by Thierry
for handling clock gating 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
- Optional EHRPWM tb clock in patch #2
- Parent child in HWMOD handled at patch #3
- Device tree binding support handled in patch #4, 6 &8
- pinctrl support in patch #5 & 7.
- DT node populated in patch #9 & 10.

This patch series based on linux-next/20121031 and tested on AM33xx.
It depends on [1]

1. https://lkml.org/lkml/2012/10/29/589
pwm: Device tree support for PWM polarity

Philip, Avinash (10):
PWMSS: Add PWM Subsystem driver for parent<->child relationship
ARM: am33xx: clk: Add optional clock for EHRPWM
ARM: OMAP: AM33xx hwmod: Add parent-child relationship for PWM
subsystem
pwm: pwm-tiecap: Add device-tree binding support for APWM driver
pwm: pwm-tiecap: pinctrl support
pwm: pwm-tiehrpwm: Add device-tree binding support for EHRPWM driver
pwm: pwm-tiehrpwm: pinctrl support
pwm: pwm-tiehrpwm: Adding TBCLK gating support.
ARM: dts: AM33XX: Add PWMSS device tree nodes
ARM: dts: AM33XX: Add PWM backlight DT data to am335x-evm

.../devicetree/bindings/pwm/pwm-tiecap.txt | 22 +
.../devicetree/bindings/pwm/pwm-tiehrpwm.txt | 25 ++
Documentation/devicetree/bindings/pwm/tipwmss.txt | 30 ++
arch/arm/boot/dts/am335x-evm.dts | 21 +
arch/arm/boot/dts/am33xx.dtsi | 90 +++++
arch/arm/mach-omap2/clock33xx_data.c | 37 ++
arch/arm/mach-omap2/control.h | 8 +
arch/arm/mach-omap2/omap_hwmod_33xx_data.c | 419 +++++++++++++-------
drivers/pwm/Kconfig | 11 +
drivers/pwm/Makefile | 1 +
drivers/pwm/pwm-tiecap.c | 54 +++-
drivers/pwm/pwm-tiehrpwm.c | 75 ++++-
drivers/pwm/tipwmss.c | 142 +++++++
drivers/pwm/tipwmss.h | 30 ++
14 files changed, 820 insertions(+), 145 deletions(-)
create mode 100644 Documentation/devicetree/bindings/pwm/pwm-tiecap.txt
create mode 100644 Documentation/devicetree/bindings/pwm/pwm-tiehrpwm.txt
create mode 100644 Documentation/devicetree/bindings/pwm/tipwmss.txt
create mode 100644 drivers/pwm/tipwmss.c
create mode 100644 drivers/pwm/tipwmss.h



\
 
 \ /
  Last update: 2012-11-08 09:21    [W:0.190 / U:0.092 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site