linux-kernel - Re: [PATCH V4 0/9] Add support for Tegra210 AGIC

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Date:	Fri, 20 May 2016 10:07:40 +0100
From:	Jon Hunter <jonathanh@...dia.com>
To:	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>,
	Marc Zyngier <marc.zyngier@....com>,
	Rob Herring <robh+dt@...nel.org>,
	"Pawel Moll" <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	"Stephen Warren" <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>
CC:	Kevin Hilman <khilman@...nel.org>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Grygorii Strashko <grygorii.strashko@...com>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Linus Walleij <linus.walleij@...aro.org>,
	<linux-tegra@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V4 0/9] Add support for Tegra210 AGIC

Hi Marc,

Let me know if you have any thoughts on this.

Cheers
Jon

On 12/05/16 16:19, Jon Hunter wrote:
> The Tegra210 has a 2nd level interrupt controller located in a separate
> power domain to the main GIC interrupt controller and hence requires
> runtime-pm support.
> 
> Add a platform driver for the GICs that require runtime-pm and make the
> necessary changes to the genirq and irqdomain core to support IRQ chips
> that require runtime-pm.
> 
> This series is based upon Marc Z's irq/irqchip-v4.7 branch [0].
> 
> Changes since V3:
> - Split the series into two, placing the clean-up/fixes patches into
>   another series [1]. The remaining patches in this series are for
>   adding runtime-pm support for irqchips and adding a platform driver
>   of second level GICs.
> - Dropped the patch to prevent early init of GICs if 'clocks' or
>   'power-domains' properties are present and re-added the patch to add
>   the compatibilty string for the Tegra210 AGIC.
> 
> Changes since V2:
> - Corrected RPM support for irqchips in genirq core as pointed out by
>   Kevin Hilman.
> - Corrected patch to save the irq type when mapping the interrupt.
> - Dropped changes to DT binding documentation and added patch to prevent
>   early init of GICs if the 'clocks' and/or 'power-domains' DT
>   properties are present (as we have discussed).
> - Moved platform driver code into it's own source file.
> - Separate changes for preparing for the platform driver into 3 patches
>   in an attempt to make it more readable!
> - Added fix for checking an interrupt descriptor is valid during IRQ
>   setup.
> 
> Changes since V1:
> - Updated GIC to only WARN and not return an error if configuring a PPI
>   fails but will still return an error if an SPI fails (per discussion
>   with Marc).
> - Dropped change to mask sense bits for GIC-v3 (as this is not
>   necessary)
> - Split patch to avoid setting interrupt type when mapping the IRQ into
>   two patches per TGLX's feedback.
> - Changed name of irqchip device structure to "parent_device"
> - Moved call to irq_chip_pm_get() outside of chip_bus_lock().
> - Dropped patch to remove clock names from GIC DT documentation and
>   added AGIC clock names.
> - Update GIC platform driver to look-up clocks names from static list.
> 
> [0] http://git.kernel.org/cgit/linux/kernel/git/maz/arm-platforms.git/log/?h=irq/irqchip-4.7
> [1] http://marc.info/?l=linux-tegra&m=146289329915585&w=2
> 
> Jon Hunter (9):
>   irqdomain: Fix handling of type settings for existing mappings
>   genirq: Look-up trigger type if not specified by caller
>   irqdomain: Don't set type when mapping an IRQ
>   genirq: Add runtime power management support for IRQ chips
>   irqchip/gic: Isolate early GIC initialisation code
>   irqchip/gic: Add helper function for chip initialisation
>   irqchip/gic: Prepare for adding platform driver
>   dt-bindings: arm-gic: Add documentation for Tegra210 AGIC
>   irqchip/gic: Add platform driver for non-root GICs that require RPM
> 
>  .../bindings/interrupt-controller/arm,gic.txt      |   3 +-
>  drivers/irqchip/Kconfig                            |   6 +
>  drivers/irqchip/Makefile                           |   1 +
>  drivers/irqchip/irq-gic-common.c                   |   4 +-
>  drivers/irqchip/irq-gic-pm.c                       | 187 +++++++++++++++++++++
>  drivers/irqchip/irq-gic.c                          | 136 ++++++++++-----
>  drivers/irqchip/irq-gic.h                          |  30 ++++
>  include/linux/irq.h                                |   4 +
>  include/linux/irqdomain.h                          |   3 +
>  kernel/irq/chip.c                                  |  35 ++++
>  kernel/irq/internals.h                             |   1 +
>  kernel/irq/irqdomain.c                             |  58 ++++++-
>  kernel/irq/manage.c                                |  38 ++++-
>  13 files changed, 451 insertions(+), 55 deletions(-)
>  create mode 100644 drivers/irqchip/irq-gic-pm.c
>  create mode 100644 drivers/irqchip/irq-gic.h
> 

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