Hi Marc and Linus, On Wed, Nov 10, 2021 at 10:58 PM Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> wrote: > > Hi All, > > The RZ/G2L Interrupt Controller is a front-end for the GIC found on > Renesas RZ/G2L SoC's with below pins: > - IRQ sense select for 8 external interrupts, mapped to 8 GIC SPI interrupts > - GPIO pins used as external interrupt input pins out of GPIOINT0-122 a > maximum of only 32 can be mapped to 32 GIC SPI interrupts, > - NMI edge select. > > _____________ > | GIC | > | ________ | > ____________ | | | | > NMI ------------------------------------>| | SPI0-479 | | GIC-600| | > _______ | |------------>| | | > | | | | PPI16-31 | | | | > | | IRQ0-IRQ8 | IRQC |------------>| | | > P0_P48_4 ------>| GPIO |---------------->| | | |________| | > | |GPIOINT0-122 | | | | > | |---------------->| TINT0-31 | | | > |______| |__________| |____________| > > The proposed RFC patches, add the IRQ domains in GPIO (pinctrl driver) and the > IRQC driver. The IRQC domain handles the actual SPI interrupt and upon reception > of the interrupt it propagates to the GPIO IRQ domain to handle virq. > Out of GPIOINT0-122 only 32 can be mapped to GIC SPI, this mapping is handled by > the IRQC driver. > > Cheers, > Prabhakar > > Changes for v3: > -> Re-structured the driver as a hierarchical irq domain instead of chained > -> made use of IRQCHIP_* macros > -> dropped locking > -> Added support for IRQ0-7 interrupts > -> Introduced 2 new patches for GPIOLIB > -> Switched to using GPIOLIB for irqdomains in pinctrl > Gentle ping. Cheers, Prabhakar > RFC v2: https://patchwork.kernel.org/project/linux-renesas-soc/cover/ > 20210921193028.13099-1-prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx/ > RFC v1: https://patchwork.kernel.org/project/linux-renesas-soc/cover/ > 20210803175109.1729-1-prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx/ > > Lad Prabhakar (7): > dt-bindings: interrupt-controller: Add Renesas RZ/G2L Interrupt > Controller > irqchip: Add RZ/G2L IA55 Interrupt Controller driver > soc: renesas: Enable IRQC driver for RZ/G2L > gpio: gpiolib: Allow free() callback to be overridden > gpio: gpiolib: Add ngirq member to struct gpio_irq_chip > pinctrl: renesas: pinctrl-rzg2l: Add IRQ domain to handle GPIO > interrupt > arm64: dts: renesas: r9a07g044: Add IRQC node to SoC DTSI > > .../renesas,rzg2l-irqc.yaml | 137 ++++++ > arch/arm64/boot/dts/renesas/r9a07g044.dtsi | 60 +++ > drivers/gpio/gpiolib.c | 13 +- > drivers/irqchip/Kconfig | 8 + > drivers/irqchip/Makefile | 1 + > drivers/irqchip/irq-renesas-rzg2l.c | 465 ++++++++++++++++++ > drivers/pinctrl/renesas/pinctrl-rzg2l.c | 197 ++++++++ > drivers/soc/renesas/Kconfig | 1 + > include/linux/gpio/driver.h | 8 + > 9 files changed, 885 insertions(+), 5 deletions(-) > create mode 100644 Documentation/devicetree/bindings/interrupt-controller/renesas,rzg2l-irqc.yaml > create mode 100644 drivers/irqchip/irq-renesas-rzg2l.c > > -- > 2.17.1 >
