Hi, This series adds support for GPIO and GPIO IRQ mux available in the RZ/N1 SoCs. The first patch of the series add support for GPIO (device-tree description). Other patches are related to GPIO interrupts and GPIO IRQ multiplexer. In the RZ/N1 SoCs, GPIO interrupts are wired to a GPIO IRQ multiplexer. This multiplexer does nothing but select 8 GPIO IRQ lines out of the 96 available to wire them to the GIC input lines. One upstreaming attempt have been done previously by Phil Edworthy [1] but the series has never been applied. Based on my understanding, I have fully reworked the driver proposed by Phil and removed the IRQ domain. Indeed, the device doesn't handle interrupts. It just routes signals. Also, as an interrupt-map property is used, the driver cannot be involved as an interrupt controller itself. It is a nexus node. With that in mind, patch 2 is related to the binding, patch 3 introduces an helper (for_each_of_imap_item) to parse the interrupt-map property. This parsing is needed by the driver. Indeed, the lines routing is defined by the interrupt-map property and the driver needs to set registers to apply this routing. Patch 4 adds a unittest for the new parsing helper. Patches 5 and 6 convert existing driver to use this helper. The last two patches (patches 7 and 8) are the IRQ multiplexer driver itself and the RZ/N1 device-tree description update to have the support for the GPIO interrupts. [1] https://lore.kernel.org/all/20190219155511.28507-1-phil.edworthy@xxxxxxxxxxx/ Best regards, Hervé Changes v1 -> v2 v1: https://lore.kernel.org/lkml/20250725152618.32886-1-herve.codina@xxxxxxxxxxx/ Rebase on top of v6.17-rc5 Patch 1 in v1 - Removed in v2 (no need for RZ/N1 compatible strings). Patch 1 (2 in v1) - Fix node names (issue reported by Rob's bot) - Fix compatible RZ/N1 compatible strings - Removed undocumented and unused 'bank-name' properties Patch 2 (3 in v1) - Remove 'interrupts' property - Update 'interrupt-map' description Patch 3 (4 in v1) - Rework of_irq_foreach_imap() to provide the for_each_of_imap_item iterator (similar to for_each_of_range) Patch 4 (new in v2) - Add a unittest for for_each_of_imap_item Patch 5 (new in v2) - Convert irqchip/ls-extirq to use for_each_of_imap_item Patch 6 (new in v2) - Convert irqchip/renesas-rza1 to use for_each_of_imap_item Patch 7 (5 in v1) - Use for_each_of_imap_item - Remove 'interrupts' property usage Patch 8 (6 in v1) - Remove 'interrupts' property Herve Codina (Schneider Electric) (8): ARM: dts: r9a06g032: Add GPIO controllers dt-bindings: soc: renesas: Add the Renesas RZ/N1 GPIO Interrupt Multiplexer of/irq: Introduce for_each_of_imap_item of: unittest: Add a test case for for_each_of_imap_item iterator irqchip/ls-extirq: Use for_each_of_imap_item iterator irqchip/renesas-rza1: Use for_each_of_imap_item iterator soc: renesas: Add support for Renesas RZ/N1 GPIO Interrupt Multiplexer ARM: dts: r9a06g032: Add support for GPIO interrupts .../soc/renesas/renesas,rzn1-gpioirqmux.yaml | 86 +++++++++ arch/arm/boot/dts/renesas/r9a06g032.dtsi | 170 ++++++++++++++++++ drivers/irqchip/irq-ls-extirq.c | 47 ++--- drivers/irqchip/irq-renesas-rza1.c | 43 ++--- drivers/of/irq.c | 70 ++++++++ .../of/unittest-data/tests-interrupts.dtsi | 9 + drivers/of/unittest.c | 116 ++++++++++++ drivers/soc/renesas/Kconfig | 4 + drivers/soc/renesas/Makefile | 1 + drivers/soc/renesas/rzn1_irqmux.c | 110 ++++++++++++ include/linux/of_irq.h | 41 ++++- 11 files changed, 639 insertions(+), 58 deletions(-) create mode 100644 Documentation/devicetree/bindings/soc/renesas/renesas,rzn1-gpioirqmux.yaml create mode 100644 drivers/soc/renesas/rzn1_irqmux.c -- 2.51.0
