On Mon, Jun 17, 2024 at 6:42 AM Andre Przywara <andre.przywara@xxxxxxx> wrote:
>
> The IOMMU IP in the Allwinner H616 SoC is *almost* compatible to the H6,
> but uses a different reset value for the bypass register, and adds some
> more registers.
>
> While a driver *can* be written to support both variants (which we in
> fact do), the hardware itself is not fully compatible, so we require a
> separate compatible string.
>
> Add the new compatible string to the list, but without changing the
> behaviour, since the driver already supports both variants.
>
> Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx>
Reviewed-by: Chen-Yu Tsai <wens@xxxxxxxx>
> ---
> drivers/iommu/sun50i-iommu.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/iommu/sun50i-iommu.c b/drivers/iommu/sun50i-iommu.c
> index 20a07f829085d..8d8f11854676c 100644
> --- a/drivers/iommu/sun50i-iommu.c
> +++ b/drivers/iommu/sun50i-iommu.c
> @@ -1067,6 +1067,7 @@ static int sun50i_iommu_probe(struct platform_device *pdev)
>
> static const struct of_device_id sun50i_iommu_dt[] = {
> { .compatible = "allwinner,sun50i-h6-iommu", },
> + { .compatible = "allwinner,sun50i-h616-iommu", },
> { /* sentinel */ },
> };
> MODULE_DEVICE_TABLE(of, sun50i_iommu_dt);
> --
> 2.39.4
>
