Hi Patrick,
On Mon, Oct 14, 2024 at 6:16 AM Patrick Rudolph
<patrick.rudo...@9elements.com> wrote:
>
> Translate IRQs by implementing of_xlate() as required by
> irq_get_by_index() to parse interrupt properties.
>
> TEST: Booted on qemu sbsa-ref that has a GICV3.
>
> Signed-off-by: Patrick Rudolph <patrick.rudo...@9elements.com>
> Reviewed-by: Simon Glass <s...@chromium.org>
> ---
> Changelog v6:
> - Update header order
>
> ---
> arch/arm/lib/gic-v3-its.c | 21 +++++++++++++++++++++
> 1 file changed, 21 insertions(+)
>
> diff --git a/arch/arm/lib/gic-v3-its.c b/arch/arm/lib/gic-v3-its.c
> index 22fa46a341..0d5545bfb2 100644
> --- a/arch/arm/lib/gic-v3-its.c
> +++ b/arch/arm/lib/gic-v3-its.c
> @@ -4,6 +4,7 @@
> */
> #include <cpu_func.h>
> #include <dm.h>
> +#include <irq.h>
> #include <asm/gic.h>
> #include <asm/gic-v3.h>
> #include <asm/io.h>
> @@ -163,8 +164,28 @@ static const struct udevice_id gic_v3_ids[] = {
> {}
> };
>
> +static int arm_gic_v3_of_xlate(struct irq *irq, struct ofnode_phandle_args
> *args)
> +{
> + if (args->args_count > 2) {
> + log_debug("Invalid args_count: %d\n", args->args_count);
> + return -EINVAL;
> + }
Aren't gicv3 at least #interrupt-cells = 3; to distinguish PPI / SPI?
> +
> + if (args->args_count > 0)
> + irq->id = args->args[0];
> + if (args->args_count > 1)
> + irq->flags = args->args[1];
Don't you have to distinguish PPI and SPIs here? You'll use
args->args[0] as PPI vs SPI and args[1] is either 1:1 (PPI) or offset
by 32 for SPIs or am I misunderstanding something?
> +
> + return 0;
> +}
> +
> +static const struct irq_ops arm_gic_v3_ops = {
> + .of_xlate = arm_gic_v3_of_xlate,
> +};
> +
> U_BOOT_DRIVER(arm_gic_v3) = {
> .name = "gic-v3",
> .id = UCLASS_IRQ,
> .of_match = gic_v3_ids,
> + .ops = &arm_gic_v3_ops,
> };
> --
> 2.46.2
>
Cheers,
Moritz
