linux-kernel - [PATCH v4 0/2] irqchip/mchp-eic: add driver for Microchip EIC

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Date:   Fri, 24 Sep 2021 19:34:56 +0300
From:   Claudiu Beznea <claudiu.beznea@...rochip.com>
To:     <tglx@...utronix.de>, <maz@...nel.org>, <robh+dt@...nel.org>
CC:     <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>
Subject: [PATCH v4 0/2] irqchip/mchp-eic: add driver for Microchip EIC

Hi,

This series adds support for Microchip External Interrupt Controller
present on SAMA7G5. The controller supports for 2 external interrupt
lines and is connected to GIC as follows:

pinX   +------+ EXT_IRQ0 +------+ int 153 (for pinX) +------+
------>|      |--------->|      |------------------->|      |
pinY   | PIO  | EXT_IRQ1 | EIC  | int 154 (for pinY) | GIC  |
------>|      |--------->|      |------------------->|      |
       +------+          +------+                    +------+

where PIO is the pin controller.

Thank you,
Claudiu Beznea

Changes in v4:
- use irq_domain_translate_twocell() instead of mchp_eic_domain_translate()
  from v2
- use IRQCHIP_PLATFORM_DRIVER_BEGIN(), IRQCHIP_MATCH(),
  IRQCHIP_PLATFORM_DRIVER_END() instead of builtin_platform_driver()
- register suspend/resume functins via syscore_ops; along with this
  driver private data structure (of type struct mchp_eic has been declared
  as static: struct mchp_eic *eic;)
- collected tags

Changes in v3:
- fix compilation warning on bindings

Changes in v2:
- s/mchp/microchip in bindings
- get rid of glitch filter settings
- use s/eic@...terrupt-controller@ in bindings
- removed '' around interrupts in bindings as proposed by Rob
- removed glitch filter settings
- switched to hierarchical irqchip driver
- addressed review comments
- use builtin_platform_driver instead of module_platform_driver

Claudiu Beznea (2):
  dt-bindings: microchip,eic: add bindings
  irqchip/mchp-eic: add support

 .../interrupt-controller/microchip,eic.yaml   |  73 +++++
 MAINTAINERS                                   |   6 +
 drivers/irqchip/Kconfig                       |   8 +
 drivers/irqchip/Makefile                      |   1 +
 drivers/irqchip/irq-mchp-eic.c                | 280 ++++++++++++++++++
 5 files changed, 368 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/microchip,eic.yaml
 create mode 100644 drivers/irqchip/irq-mchp-eic.c

-- 
2.25.1