Hi all,
Unlike on most other Renesas SoCs, the GPIO controller block 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.
Hence this patch series adds DT bindings and a driver for this
front-end, adds a device node for it in the RZ/A1H DTS, and uses it to
enable support for the 3 input switches on the Renesas RSK+RZA1
development board.
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.
Dependencies:
- Patch 3 depends on patch 2,
- Patch 4 can be applied as soon as the DT bindings in patch 1 have
been accepted,
- Patch 5 depends on patch 4.
Upstream strategy:
- Patches 1-2 are intended to be applied to the irqchip tree,
- Patches 3-5 are meant for the Renesas tree.
This has been tested on RSK+RZA1 with evtest and s2ram wake-up.
I have verified proper operation of low-level and rising/falling sense
select, too.
Thanks!
Geert Uytterhoeven (5):
dt-bindings: interrupt-controller: Add Renesas RZ/A1 Interrupt
Controller
irqchip: Add Renesas RZ/A1 Interrupt Controller driver
soc: renesas: Enable RZ/A1 IRQC on RZ/A1H and RZ/A2M
ARM: dts: r7s72100: Add IRQC device node
ARM: dts: rskrza1: Add input switches
.../renesas,rza1-irqc.txt | 30 +++
arch/arm/boot/dts/r7s72100-rskrza1.dts | 38 +++
arch/arm/boot/dts/r7s72100.dtsi | 9 +
drivers/irqchip/Kconfig | 4 +
drivers/irqchip/Makefile | 1 +
drivers/irqchip/irq-renesas-rza1.c | 235 ++++++++++++++++++
drivers/soc/renesas/Kconfig | 4 +-
7 files changed, 320 insertions(+), 1 deletion(-)
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
