[PATCH V8 0/3] irqchip: qcom: Add IRQ combiner driver

From: Agustin Vega-Frias
Date: Tue Nov 29 2016 - 17:58:06 EST

Add support for IRQ combiners in the Top-level Control and Status
Registers (TCSR) hardware block in Qualcomm Technologies chips.

The first patch adds support for ResourceSource/IRQ domain mapping
when using Extended IRQ Resources with a specific ResourceSource.
The patch prevents the ACPI core from attempting to map IRQ resources
with a valid ResourceSource as GSIs.

The second patch fixes IRQ probe deferral by allowing platform_device
IRQ resources to be re-initialized if the ACPI core failed to find
the IRQ domain during ACPI bus scan.

Both changes described above are conditional on the ACPI_GENERIC_GSI config.

The third patch takes advantage of the new capabilities to implement
the driver for the IRQ combiners.

Tested on top of v4.9-rc7.

Changes V7 -> V8:
* Reorder patches to allow all new code to be under drivers/acpi/irq.c.
* Change acpi_irq_get implementation to be more similar to of_irq_get
to improve maintainability.

Changes V6 -> V7:
* Consolidate changes for ResourceSource/IRQ domain mapping to the same
source file implementing the generic GSI support, making it conditional
* Eliminate some code duplication by implementing acpi_register_gsi in
terms of the new acpi_register_irq API.

Changes V5 -> V6:
* Drop probe table and on-demand probing based on resource_source
* Add patch to fix probe deferral
* Change back combiner driver to use the platform_device/platform_driver

Agustin Vega-Frias (3):
ACPI: Add support for ResourceSource/IRQ domain mapping
ACPI: Retry IRQ conversion if it failed previously
irqchip: qcom: Add IRQ combiner driver

drivers/acpi/Makefile | 2 +-
drivers/acpi/gsi.c | 98 -----------
drivers/acpi/irq.c | 315 +++++++++++++++++++++++++++++++++
drivers/acpi/resource.c | 29 ++--
drivers/base/platform.c | 9 +-
drivers/irqchip/Kconfig | 8 +
drivers/irqchip/Makefile | 1 +
drivers/irqchip/qcom-irq-combiner.c | 337 ++++++++++++++++++++++++++++++++++++
include/linux/acpi.h | 28 +++
9 files changed, 714 insertions(+), 113 deletions(-)
delete mode 100644 drivers/acpi/gsi.c
create mode 100644 drivers/acpi/irq.c
create mode 100644 drivers/irqchip/qcom-irq-combiner.c

Qualcomm Datacenter Technologies, Inc. on behalf of the Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.