Re: [PATCH v2 1/4] dt-bindings: misc: qcom,fastrpc: add iommu-ranges support for context bank

[Vinayak Katoch <vinayak.katoch@oss.qualcomm.com>]

On 10/9/2026 3:26 PM, Krzysztof Kozlowski wrote:
> On Wed, Oct 07, 2026 at 05:07:48PM +0530, Vinayak Katoch wrote:
>> The driver uses the presence of iommu-ranges on a context bank node to
>> identify it as dedicated for extended IOVA mapping. iommu-ranges lists
>> the IOVA ranges the IOMMU allocator may use for that device; any range
>> not listed is left unused.
>>
>> Add iommu-ranges to the compute-cb subnode properties so the DT
>> validator accepts it on context bank nodes.
> 
> Example looks incomplete now. Please add a new example showing complete
> picture of this device with all new properties.
> 

Sure, will update.

>>
>> Relax #address-cells to enum: [1, 2] and #size-cells to enum: [0, 2] to
>> allow platforms that require 64-bit values in iommu-ranges to pass
>> binding validation.
> 
> Which platforms are these?
> 

Kaanapali onwards, I'll update it in the commit message.

>>
>> Signed-off-by: Vinayak Katoch <vinayak.katoch@oss.qualcomm.com>
>> ---
>>  Documentation/devicetree/bindings/misc/qcom,fastrpc.yaml | 6 ++++--
>>  1 file changed, 4 insertions(+), 2 deletions(-)
>>
> 
> Looks like this needs some dependencies.

Yes, it depends on v5 [1]. That series still has open comments, so I'll
wait until it is aligned and list it as a dependency in the next version.

[1]
https://lore.kernel.org/all/20260926-vpu_iommu_iova_handling-v5-4-0322ca5dc10c@oss.qualcomm.com/

> 
> Best regards,
> Krzysztof