linux-kernel - [PATCH V9 0/3] irqchip: qcom: Add IRQ combiner driver

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Date:   Wed, 14 Dec 2016 17:10:35 -0500
From:   Agustin Vega-Frias <agustinv@...eaurora.org>
To:     linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, rjw@...ysocki.net,
        lenb@...nel.org, tglx@...utronix.de, jason@...edaemon.net,
        marc.zyngier@....com
Cc:     lorenzo.pieralisi@....com, timur@...eaurora.org,
        cov@...eaurora.org, agross@...eaurora.org, harba@...eaurora.org,
        jcm@...hat.com, msalter@...hat.com, mlangsdo@...hat.com,
        ahs3@...hat.com, astone@...hat.com, graeme.gregory@...aro.org,
        guohanjun@...wei.com, charles.garcia-tobin@....com,
        Agustin Vega-Frias <agustinv@...eaurora.org>
Subject: [PATCH V9 0/3] irqchip: qcom: Add IRQ combiner driver

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

The first patch prevents the ACPI core from attempting to map IRQ resources
with a valid ResourceSource as GSIs.

The first patch adds support for ResourceSource/IRQ domain mapping and
fixes IRQ probe deferral by allowing platform_device IRQ resources to be
re-initialized from the corresponding ACPI IRQ resource.

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.

Changes V8 -> V9:
* Do not attempt the mapping for non-GSI IRQs during bus scan.
* Make some public APIs private to drivers/acpi/irq.c since they are no
  longer used on other modules.

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.

Agustin Vega-Frias (3):
  ACPI: Generic GSI: Do not attempt to map non-GSI IRQs during bus scan
  ACPI: Add support for ResourceSource/IRQ domain mapping
  irqchip: qcom: Add IRQ combiner driver

 drivers/acpi/Makefile               |   2 +-
 drivers/acpi/gsi.c                  |  98 -----------
 drivers/acpi/irq.c                  | 280 +++++++++++++++++++++++++++++++
 drivers/acpi/resource.c             |  17 +-
 drivers/base/platform.c             |   9 +-
 drivers/irqchip/Kconfig             |   9 +
 drivers/irqchip/Makefile            |   1 +
 drivers/irqchip/qcom-irq-combiner.c | 322 ++++++++++++++++++++++++++++++++++++
 include/linux/acpi.h                |  10 ++
 9 files changed, 647 insertions(+), 101 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.