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SubjectRe: [RFC PATCH v3 0/7] Renesas RZ/G2L IRQC support
Hi Marc and Linus,

On Mon, Nov 22, 2021 at 7:25 PM Lad, Prabhakar
<prabhakar.csengg@gmail.com> wrote:
>
> Hi Marc and Linus,
>
> On Wed, Nov 10, 2021 at 10:58 PM Lad Prabhakar
> <prabhakar.mahadev-lad.rj@bp.renesas.com> 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.
>
I plan to post a non RFC version soon, can I have your feedback on this please.

Cheers,
Prabhakar

>
> > RFC v2: https://patchwork.kernel.org/project/linux-renesas-soc/cover/
> > 20210921193028.13099-1-prabhakar.mahadev-lad.rj@bp.renesas.com/
> > RFC v1: https://patchwork.kernel.org/project/linux-renesas-soc/cover/
> > 20210803175109.1729-1-prabhakar.mahadev-lad.rj@bp.renesas.com/
> >
> > 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
> >

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