On Tue, Oct 15, 2024 at 11:15 PM Patrick Rudolph patrick.rudolph@9elements.com wrote:
Translate IRQs by implementing of_xlate() as required by irq_get_by_index() to parse interrupt properties.
Map DT interrupts to ARM GIC interrupts as follows:
- Interrupt numbers ID32-ID1019 are used for SPIs
- ID0-ID15 are used for SGIs
- ID16-ID31 are used for PPIs
TEST: Booted on qemu sbsa-ref that has a GICV3.
Signed-off-by: Patrick Rudolph patrick.rudolph@9elements.com
Reviewed-by: Moritz Fischer moritzf@google.com
Changelog v9:
- Require at least 3 interrupt-cells
- Map SPI interrupts to ID32+
- Map PPI interrupts to ID16+
arch/arm/lib/gic-v3-its.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+)
diff --git a/arch/arm/lib/gic-v3-its.c b/arch/arm/lib/gic-v3-its.c index 22fa46a341..58f8bf864f 100644 --- a/arch/arm/lib/gic-v3-its.c +++ b/arch/arm/lib/gic-v3-its.c @@ -4,9 +4,11 @@ */ #include <cpu_func.h> #include <dm.h> +#include <irq.h> #include <asm/gic.h> #include <asm/gic-v3.h> #include <asm/io.h> +#include <dt-bindings/interrupt-controller/arm-gic.h> #include <linux/bitops.h> #include <linux/printk.h> #include <linux/sizes.h> @@ -163,8 +165,30 @@ 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 < 3) {log_debug("Invalid args_count: %d\n", args->args_count);return -EINVAL;}if (args->args[0] == GIC_SPI)irq->id = args->args[1] + 32;elseirq->id = args->args[1] + 16;irq->flags = args->args[2];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