ARM: dts: r9a06g032: Add support for GPIO interrupts

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: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://patch.msgid.link/20260114093938.1089936-9-herve.codina@bootlin.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

diff --git a/arch/arm/boot/dts/renesas/r9a06g032.dtsi b/arch/arm/boot/dts/renesas/r9a06g032.dtsi
index 932e39c3ddafb363533670b65ec7e1bcaf8e8e89..f4f760aff28bdb779735cd561878a3cfdaf7927b 100644 (file)
--- a/arch/arm/boot/dts/renesas/r9a06g032.dtsi
+++ b/arch/arm/boot/dts/renesas/r9a06g032.dtsi
@@ -549,6 +549,14 @@
                                gpio-controller;
                                #gpio-cells = <2>;
                                snps,nr-gpios = <32>;
+
+                               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   */
@@ -590,6 +598,14 @@
                                gpio-controller;
                                #gpio-cells = <2>;
                                snps,nr-gpios = <32>;
+
+                               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 */
@@ -621,6 +637,14 @@
                                gpio-controller;
                                #gpio-cells = <2>;
                                snps,nr-gpios = <32>;
+
+                               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 */
@@ -633,6 +657,23 @@
                        };
                };
 
+               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>;