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riscv: aclint_ipi: Support T-Head C900 CLINT

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Although timer component of the CLINT isn't fully compatible with the
generic RISC-V ACLINT, the IPI component behaves the same.

As the CLINT doesn't have corresponding riscv_aclint_timer driver
available, let's try looking for a compatible SYSCON device directly
when no riscv_aclint_timer device could be found on IPI initialization.

Signed-off-by: Yao Zi <ziyao@disroot.org>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
This commit is contained in:
Yao Zi 2025-06-06 04:28:00 +00:00 committed by Leo Yu-Chi Liang
parent c405bab766
commit 4153ceb0fe
1 changed files with 5 additions and 0 deletions
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5
arch/riscv/lib/aclint_ipi.c
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@ -29,6 +29,10 @@ int riscv_init_ipi(void)
ret = uclass_get_device_by_driver(UCLASS_TIMER,
DM_DRIVER_GET(riscv_aclint_timer), &dev);
if (ret == -ENODEV)
ret = uclass_get_device_by_driver(UCLASS_SYSCON,
DM_DRIVER_GET(riscv_aclint_swi), &dev);
if (ret)
return ret;
@ -66,6 +70,7 @@ int riscv_get_ipi(int hart, int *pending)
static const struct udevice_id riscv_aclint_swi_ids[] = {
{ .compatible = "riscv,aclint-mswi", .data = RISCV_SYSCON_ACLINT },
{ .compatible = "thead,c900-clint", .data = RISCV_SYSCON_ACLINT },
{ }
};