| From: |
| "Philip, Avinash" <avinashphilip@ti.com> |
| To: |
| <thierry.reding@avionic-design.de>, <paul@pwsan.com>,
<tony@atomide.com>, <linux@arm.linux.org.uk>, <b-cousson@ti.com> |
| Subject: |
| [PATCH v3 00/10] Support for AM33xx PWM Subsystem |
| Date: |
| Tue, 20 Nov 2012 10:33:41 +0530 |
| Message-ID: |
| <1353387831-31538-1-git-send-email-avinashphilip@ti.com> |
| Cc: |
| <hvaibhav@ti.com>, <anilkumar@ti.com>,
<linux-kernel@vger.kernel.org>,
<devicetree-discuss@lists.ozlabs.org>, <linux-doc@vger.kernel.org>,
<linux-omap@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>, <nsekhar@ti.com>,
<gururaja.hebbar@ti.com>, <vaibhav.bedia@ti.com>,
"Philip, Avinash" <avinashphilip@ti.com> |
| Archive‑link: | |
Article |
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 & 6 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/20121115 and tested on AM33xx.
It depends on [1]
1. https://lkml.org/lkml/2012/11/19/338
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 | 23 ++
.../devicetree/bindings/pwm/pwm-tiehrpwm.txt | 23 ++
.../devicetree/bindings/pwm/pwm-tipwmss.txt | 32 ++
arch/arm/boot/dts/am335x-evm.dts | 21 +
arch/arm/boot/dts/am33xx.dtsi | 84 ++++
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 | 50 +++-
drivers/pwm/pwm-tiehrpwm.c | 65 +++-
drivers/pwm/pwm-tipwmss.c | 143 +++++++
drivers/pwm/tipwmss.h | 39 ++
14 files changed, 811 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/pwm-tipwmss.txt
create mode 100644 drivers/pwm/pwm-tipwmss.c
create mode 100644 drivers/pwm/tipwmss.h
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
