In the RZ/N1 SoC, the GPIO interrupts are multiplexed using the GPIO
Interrupt Multiplexer.
Add the multiplexer node and connect GPIO interrupt lines to the
multiplexer.
The interrupt-map available in the multiplexer node has to be updated in
dts files depending on the GPIO usage. Indeed, the usage of an interrupt
for a GPIO is board dependent.
Up to 8 GPIOs can be used as an interrupt line (one per multiplexer
output interrupt).
Signed-off-by: Herve Codina (Schneider Electric) <herve.codina@bootlin.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
arch/arm/boot/dts/renesas/r9a06g032.dtsi | 41 ++++++++++++++++++++++++
1 file changed, 41 insertions(+)
diff --git a/arch/arm/boot/dts/renesas/r9a06g032.dtsi b/arch/arm/boot/dts/renesas/r9a06g032.dtsi
index da977cdd8487..c7196e720c6c 100644
--- a/arch/arm/boot/dts/renesas/r9a06g032.dtsi
+++ b/arch/arm/boot/dts/renesas/r9a06g032.dtsi
@@ -534,6 +534,14 @@ gpio0a: gpio-port@0 {
#gpio-cells = <2>;
snps,nr-gpios = <32>;
reg = <0>;
+
+ interrupt-controller;
+ interrupt-parent = <&gpioirqmux>;
+ interrupts = < 0 1 2 3 4 5 6 7
+ 8 9 10 11 12 13 14 15
+ 16 17 18 19 20 21 22 23
+ 24 25 26 27 28 29 30 31 >;
+ #interrupt-cells = <2>;
};
/* GPIO0b[0..1] connected to pins GPIO1..2 */
@@ -576,6 +584,14 @@ gpio1a: gpio-port@0 {
#gpio-cells = <2>;
snps,nr-gpios = <32>;
reg = <0>;
+
+ interrupt-controller;
+ interrupt-parent = <&gpioirqmux>;
+ interrupts = < 32 33 34 35 36 37 38 39
+ 40 41 42 43 44 45 46 47
+ 48 49 50 51 52 53 54 55
+ 56 57 58 59 60 61 62 63 >;
+ #interrupt-cells = <2>;
};
/* GPIO1b[0..1] connected to pins GPIO55..56 */
@@ -608,6 +624,14 @@ gpio2a: gpio-port@0 {
#gpio-cells = <2>;
snps,nr-gpios = <32>;
reg = <0>;
+
+ interrupt-controller;
+ interrupt-parent = <&gpioirqmux>;
+ interrupts = < 64 65 66 67 68 69 70 71
+ 72 73 74 75 76 77 78 79
+ 80 81 82 83 84 85 86 87
+ 88 89 90 91 92 93 94 95 >;
+ #interrupt-cells = <2>;
};
/* GPIO2b[0..9] connected to pins GPIO160..169 */
@@ -620,6 +644,23 @@ gpio2b: gpio-port@1 {
};
};
+ gpioirqmux: interrupt-controller@51000480 {
+ compatible = "renesas,r9a06g032-gpioirqmux", "renesas,rzn1-gpioirqmux";
+ reg = <0x51000480 0x20>;
+ #interrupt-cells = <1>;
+ #address-cells = <0>;
+ interrupt-map-mask = <0x7f>;
+
+ /*
+ * Example mapping entry. Board DTs need to overwrite
+ * 'interrupt-map' with their specific mapping. Check
+ * the irqmux binding documentation for details.
+ */
+ interrupt-map = <0 &gic GIC_SPI 103 IRQ_TYPE_LEVEL_HIGH>;
+
+ status = "disabled";
+ };
+
can0: can@52104000 {
compatible = "renesas,r9a06g032-sja1000", "renesas,rzn1-sja1000";
reg = <0x52104000 0x800>;
--
2.51.0Hi Hervé,
On Mon, 27 Oct 2025 at 13:36, Herve Codina (Schneider Electric)
<herve.codina@bootlin.com> wrote:
> In the RZ/N1 SoC, the GPIO interrupts are multiplexed using the GPIO
> Interrupt Multiplexer.
>
> Add the multiplexer node and connect GPIO interrupt lines to the
> multiplexer.
>
> The interrupt-map available in the multiplexer node has to be updated in
> dts files depending on the GPIO usage. Indeed, the usage of an interrupt
> for a GPIO is board dependent.
>
> Up to 8 GPIOs can be used as an interrupt line (one per multiplexer
> output interrupt).
>
> Signed-off-by: Herve Codina (Schneider Electric) <herve.codina@bootlin.com>
> Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Thanks for your patch!
> --- a/arch/arm/boot/dts/renesas/r9a06g032.dtsi
> +++ b/arch/arm/boot/dts/renesas/r9a06g032.dtsi
> @@ -534,6 +534,14 @@ gpio0a: gpio-port@0 {
> #gpio-cells = <2>;
> snps,nr-gpios = <32>;
> reg = <0>;
> +
> + interrupt-controller;
> + interrupt-parent = <&gpioirqmux>;
> + interrupts = < 0 1 2 3 4 5 6 7
> + 8 9 10 11 12 13 14 15
> + 16 17 18 19 20 21 22 23
> + 24 25 26 27 28 29 30 31 >;
I would drop the spaces after/before the angle brackets.
> + #interrupt-cells = <2>;
> };
>
> /* GPIO0b[0..1] connected to pins GPIO1..2 */
> @@ -620,6 +644,23 @@ gpio2b: gpio-port@1 {
> };
> };
>
> + gpioirqmux: interrupt-controller@51000480 {
> + compatible = "renesas,r9a06g032-gpioirqmux", "renesas,rzn1-gpioirqmux";
> + reg = <0x51000480 0x20>;
> + #interrupt-cells = <1>;
> + #address-cells = <0>;
> + interrupt-map-mask = <0x7f>;
> +
> + /*
> + * Example mapping entry. Board DTs need to overwrite
> + * 'interrupt-map' with their specific mapping. Check
> + * the irqmux binding documentation for details.
> + */
> + interrupt-map = <0 &gic GIC_SPI 103 IRQ_TYPE_LEVEL_HIGH>;
> +
> + status = "disabled";
So this is disabled by default (despite the driver being enabled by
default), because the board has to provide the proper real interrupt-map
anyway. Makes sense.
> + };
> +
> can0: can@52104000 {
> compatible = "renesas,r9a06g032-sja1000", "renesas,rzn1-sja1000";
> reg = <0x52104000 0x800>;
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
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
On Mon, Oct 27, 2025 at 01:36:00PM +0100, Herve Codina (Schneider Electric) wrote: > In the RZ/N1 SoC, the GPIO interrupts are multiplexed using the GPIO > Interrupt Multiplexer. > > Add the multiplexer node and connect GPIO interrupt lines to the > multiplexer. > > The interrupt-map available in the multiplexer node has to be updated in > dts files depending on the GPIO usage. Indeed, the usage of an interrupt > for a GPIO is board dependent. > > Up to 8 GPIOs can be used as an interrupt line (one per multiplexer > output interrupt). > > Signed-off-by: Herve Codina (Schneider Electric) <herve.codina@bootlin.com> > Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
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