[PATCH V4 0/9] Add support for Tegra210 AGIC

From: Jon Hunter
Date: Thu May 12 2016 - 11:19:48 EST


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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2.1.4