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ARM: OMAP2+: Add device-tree support for timers

Benoit Cousson linux-arm-kernel linux-devicetree linux-omap 1 version New

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  1. v2 Latest0 of 7 patches 0 repliesNew

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Cover letter [PATCH V2 0/7] ARM: OMAP2+: Add device-tree support for timers

Hi Tony,

I was about to take the DTS patch, but was wondering if you will pull the driver changes for 3.7.

Thanks,
Benoit

Quoted 55 lines · Jon Hunter

This series adds device-tree support for the timers on OMAP2+ devices including AM33xx.

Testing:
1. I have booted linux with this series on OMAP2420 H4, OMAP3430 Beagle and OMAP4430 Panda with/without device-tree present.
2. Vaibhav has booted linux on AM335x Beagle bone (thanks!)
3. I have tested the all the timers (not used by the kernel as sys-timers) on OMAP2420 H4, OMAP3430 Beagle and OMAP4430 Panda with/without device-tree with this series. The testing includes ...
a. Configuring, starting a timer and checking the counter value is
incrementing.
b. Testing timer overflow interrupt when timer expires.
c. Using different clock sources to operate the timer with.
4. Verified on OMAP4430 and AM33xx (Vaibhav) that the kernel boots when using a GP timer as clock-source (default for OMAP is 32k-sync timer). Thanks to Vaibhav for catching and tracking down a bug when using a GP-timer as the clock-source!

V2 changes:
- Remove use of device-tree alias property
- Migrate OMAP timers to request timers by property instead of device ID
- Include OMAP2 support

Jon Hunter (7):
ARM: dts: OMAP: Add timer nodes
ARM: OMAP3: Dynamically disable secure timer nodes for secure devices
ARM: OMAP4: Add timer clock aliases for device-tree
ARM: OMAP: Add a timer attribute for timers that can interrupt the
DSP
ARM: OMAP: Add function to request a timer by capability
ARM: OMAP3: Add generic machine descriptor for boards with OMAP3 GP
devices
ARM: OMAP: Add DT support for timer driver

 .../devicetree/bindings/arm/omap/timer.txt         |   30 +++++
 arch/arm/boot/dts/am33xx.dtsi                      |   61 +++++++++
 arch/arm/boot/dts/omap2.dtsi                       |   86 +++++++++++++
 arch/arm/boot/dts/omap2420.dtsi                    |    8 ++
 arch/arm/boot/dts/omap2430.dtsi                    |    8 ++
 arch/arm/boot/dts/omap3.dtsi                       |   96 ++++++++++++++
 arch/arm/boot/dts/omap4.dtsi                       |   86 +++++++++++++
 arch/arm/mach-omap1/timer.c                        |    2 +-
 arch/arm/mach-omap2/board-generic.c                |   18 +++
 arch/arm/mach-omap2/clock44xx_data.c               |   12 ++
 arch/arm/mach-omap2/common.h                       |    1 +
 arch/arm/mach-omap2/omap_hwmod_2xxx_ipblock_data.c |    9 ++
 arch/arm/mach-omap2/omap_hwmod_3xxx_data.c         |   15 ++-
 arch/arm/mach-omap2/omap_hwmod_44xx_data.c         |   15 ++-
 arch/arm/mach-omap2/timer.c                        |  131 +++++++++++++++++---
 arch/arm/plat-omap/dmtimer.c                       |   94 +++++++++++++-
 arch/arm/plat-omap/include/plat/dmtimer.h          |    2 +
 17 files changed, 646 insertions(+), 28 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/arm/omap/timer.txt

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