Quoting Geert Uytterhoeven (2023-07-26 15:44:43)
> Add an interrupt-controlled keyboard to test operation of the Interrupt
> Controller for External Devices (INTC-EX) on the Spider development
> board.
>
> Test procedure:
> - Run "evtest" (select device event number "0"),
> - Pull one of the following signals on the Spider Breakout Board low
> to trigger the corresponding interrupt and keypress (key release is
> automatic):
> - Test point CP18 -> IRQ0 (KEY_0),
> - Test point CP17 -> IRQ1 (KEY_1),
> - CN37 pin 4 -> IRQ4 (KEY_4),
> - CN37 pin 2 -> IRQ5 (KEY_5).
Pin 4 working, while Pin 2 fires 'once'.
CP18/CP17 yet to be found.
In cooperation with Geert ...
Tested-by: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
>
> GND is available on e.g. pin 8 of CN37 (MSIOF0 PIN HEADER).
>
> Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> ---
> Not intended for upstream merge.
>
> I do not have physical access to a Spider development board.
> Thanks for testing!
>
> Note that this IRQ conflicts with operation of LED7, so do not apply the
> LED patch while testing.
> ---
> .../boot/dts/renesas/r8a779f0-spider.dts | 52 +++++++++++++++++++
> 1 file changed, 52 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/renesas/r8a779f0-spider.dts b/arch/arm64/boot/dts/renesas/r8a779f0-spider.dts
> index 7aac3f4d319c330c..a73251da1f215141 100644
> --- a/arch/arm64/boot/dts/renesas/r8a779f0-spider.dts
> +++ b/arch/arm64/boot/dts/renesas/r8a779f0-spider.dts
> @@ -6,12 +6,56 @@
> */
>
> /dts-v1/;
> +
> +#include <dt-bindings/input/input.h>
> +
> #include "r8a779f0-spider-cpu.dtsi"
> #include "r8a779f0-spider-ethernet.dtsi"
>
> / {
> model = "Renesas Spider CPU and Breakout boards based on r8a779f0";
> compatible = "renesas,spider-breakout", "renesas,spider-cpu", "renesas,r8a779f0";
> +
> + keyboard-irq {
> + compatible = "gpio-keys";
> +
> + pinctrl-0 = <&keyboard_irq_pins>;
> + pinctrl-names = "default";
> +
> + interrupt-parent = <&intc_ex>;
> +
> + key-0 {
> + interrupts = <0 IRQ_TYPE_EDGE_FALLING>;
> + linux,code = <KEY_0>;
> + label = "Breakabout Board CP18";
> + wakeup-source;
> + debounce-interval = <20>;
> + };
> +
> + key-1 {
> + interrupts = <1 IRQ_TYPE_EDGE_FALLING>;
> + linux,code = <KEY_1>;
> + label = "Breakabout Board CP17";
> + wakeup-source;
> + debounce-interval = <20>;
> + };
> +
> + key-4 {
> + interrupts = <4 IRQ_TYPE_EDGE_FALLING>;
> + linux,code = <KEY_4>;
> + label = "Breakout Board CN37-4";
> + wakeup-source;
> + debounce-interval = <20>;
> + };
> +
> + key-5 {
> + interrupts = <5 IRQ_TYPE_EDGE_FALLING>;
> + linux,code = <KEY_5>;
> + label = "Breakout Board CN37-2";
> + wakeup-source;
> + debounce-interval = <20>;
> + };
> + };
> };
>
> &i2c4 {
> @@ -22,3 +66,11 @@ eeprom@51 {
> pagesize = <8>;
> };
> };
> +
> +&pfc {
> + keyboard_irq_pins: keyboard-irq {
> + groups = "intc_ex_irq0", "intc_ex_irq1", "intc_ex_irq4",
> + "intc_ex_irq5";
> + function = "intc_ex";
> + };
> +};
> --
> 2.34.1
>
