[PATCH 015/171] iommu: Add a Kconfig for SPL_IOMMU

[Mark Kettenis]

> From: Simon Glass <sjg at chromium.org>
> Date: Mon, 30 Jan 2023 07:40:48 -0700
> 
> This is implicitly used in the source and seems useful, so add it.

At this point the IOMMU support isn't used for SPL.  While I can't
rule out we'll see an SoC at some point the needs it, I don't think
I've seen an SoC that has devices that are typically used in SPL (MMC,
NOR flash, memory controllers) behind an IOMMU.  So switching to
IS_ENABLED(CONFIG_IOMMU) seems more logical to me.

Cheers,

Mark

> Signed-off-by: Simon Glass <sjg at chromium.org>
> ---
> 
>  drivers/iommu/Kconfig | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
> index dabc1f900d5..bbacd14a56c 100644
> --- a/drivers/iommu/Kconfig
> +++ b/drivers/iommu/Kconfig
> @@ -14,6 +14,10 @@ config IOMMU
>  	  memory if the IOMMU has been programmed to allow access to
>  	  that memory.
>  
> +config SPL_IOMMU
> +	def_bool n  # Enable Driver Model for IOMMU drivers (SPL)
> +	depends on SPL_DM
> +
>  config APPLE_DART
>  	bool "Apple DART support"
>  	depends on IOMMU && ARCH_APPLE
> -- 
> 2.39.1.456.gfc5497dd1b-goog
> 
>