Hi all,
Unlike on most other Renesas SoCs, the GPIO controller blocks on RZ/A1
and RZ/A2 SoCs lack interrupt functionality. While the GPIOs can be
routed to the GIC as pin interrupts, this is of limited use, as the
PL390 or GIC-400 supports rising edge and high-level interrupts only.
Fortunately RZ/A1 and RZ/A2 SoCs contain a small front-end for the GIC,
allowing to use up to 8 external interrupts, with configurable sense
select. This patch series adds DT bindings and a driver for this
front-end.
Changes compared to v3:
- Add Reviewed-by,
- Split off drivers/soc/renesas and DTS changes.
Changes compared to v2:
- Add Tested-by,
- Use standard interrupt-map instead of custom renesas,gic-spi-base.
I'm still a bit puzzled by the confusing semantics (double meaning)
of child and parent unit addresses in interrupt-map.
Changes compared to v1:
- Add Reviewed-by,
- Replace gic_spi_base in OF match data by renesas,gic-spi-base in DT,
- Document RZ/A2M,
- Use u16 for register values,
- Use relaxed I/O accessors,
- Use "rza1-irqc" as irq_chip class name,
- Enable driver on RZ/A2M.
This has been tested using the input switches on the Renesas RSK+RZA1
development board, with evtest and s2ram wake-up. I have verified
proper operation of low-level and rising/falling sense select, too.
Chris Brandt has tested this driver on RZ/A2M.
Thanks for applying!
Geert Uytterhoeven (2):
dt-bindings: interrupt-controller: Add Renesas RZ/A1 Interrupt
Controller
irqchip: Add Renesas RZ/A1 Interrupt Controller driver
.../renesas,rza1-irqc.txt | 43 +++
drivers/irqchip/Kconfig | 4 +
drivers/irqchip/Makefile | 1 +
drivers/irqchip/irq-renesas-rza1.c | 283 ++++++++++++++++++
4 files changed, 331 insertions(+)
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/renesas,rza1-irqc.txt
create mode 100644 drivers/irqchip/irq-renesas-rza1.c
--
2.17.1
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
