linux-kernel - [PATCH 00/12] irqchip/stm32-exti: add irq-map and STM32MP25 support

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Message-ID: <20240216094758.916722-1-antonio.borneo@foss.st.com>
Date: Fri, 16 Feb 2024 10:47:45 +0100
From: Antonio Borneo <antonio.borneo@...s.st.com>
To: Thomas Gleixner <tglx@...utronix.de>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley
	<conor+dt@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre
 Torgue <alexandre.torgue@...s.st.com>,
        Catalin Marinas
	<catalin.marinas@....com>,
        Will Deacon <will@...nel.org>
CC: Antonio Borneo <antonio.borneo@...s.st.com>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH 00/12] irqchip/stm32-exti: add irq-map and STM32MP25 support

This series adds support for STM32MP25 to stm32-exti driver.
The STM32MP25 includes two instances of the EXTI irq controller,
each mapping their EXTI events to different GIC irq sets.

In the current driver code, the mapping between events and irqs
would require adding to the driver two new compatibles and two
new mapping tables for this new SoC. This way of working starts
showing it's limits; it doesn't scale and is not flexible.

This series introduces an optional nexus child node to the EXTI
DT node. The nexus node provides the mapping between events and
irqs through the standard "interrupt-map" property, thus moving
in the DT the description of the HW connections between the EXTI
and the GIC.
Being the nexus child node optional, it guarantees the backward
compatibility with all the existing DT for STM32MP1xx.
Nevertheless the series updates and uniforms the existing DT by
adding to them the nexus child node too.

The DT node for the GIC of STM32MP25 is already upstream with:
	#address-cells = <1>;
This value needs to be updated to <2> because the SoC uses 64 bit
addressing and the v2m child node of GIC requires 64 bit address
too.
This minor change to the GIC property "#address-cells" impacts
the contents of the "interrupt-map" property.
This series also anticipates the addition of the v2m child node
to the GIC, thus avoiding any further rework.


Antonio Borneo (11):
  irqchip/stm32-exti: Fix minor indentation issue
  dt-bindings: interrupt-controller: stm32-exti: Add irq nexus child
    node
  irqchip/stm32-exti: Map interrupts through interrupt nexus node
  irqchip/stm32-exti: Convert driver to standard PM
  irqchip/stm32-exti: Skip secure events
  irqchip/stm32-exti: Mark events reserved with RIF configuration check
  arm64: Kconfig.platforms: Enable STM32_EXTI for ARCH_STM32
  ARM: dts: stm32: Use exti interrupt-map on stm32mp151
  ARM: dts: stm32: Use exti interrupt-map on stm32mp131
  arm64: dts: st: Add exti1 and exti2 nodes on stm32mp251
  arm64: dts: st: Add interrupt parent to pinctrl on stm32mp251

Christian Bruel (1):
  arm64: dts: st: Add v2m to GIC node on stm32mp251

 .../interrupt-controller/st,stm32-exti.yaml   |  42 ++++-
 arch/arm/boot/dts/st/stm32mp131.dtsi          |  49 +++++-
 arch/arm/boot/dts/st/stm32mp151.dtsi          |  51 ++++++
 arch/arm64/Kconfig.platforms                  |   1 +
 arch/arm64/boot/dts/st/stm32mp251.dtsi        | 154 +++++++++++++++++-
 drivers/irqchip/irq-stm32-exti.c              | 148 ++++++++++++-----
 6 files changed, 397 insertions(+), 48 deletions(-)


base-commit: 6613476e225e090cc9aad49be7fa504e290dd33d
-- 
2.34.1