Re: [PATCH V1 2/3] dt-bindings: ufs: Document bindings for SA8255P UFS Host Controller

[Ram Kumar Dwivedi]

On 15-Nov-25 5:25 PM, Krzysztof Kozlowski wrote:
> On Fri, Nov 14, 2025 at 08:26:45PM +0530, Ram Kumar Dwivedi wrote:
>> From: Ram Kumar Dwivedi <quic_rdwivedi@xxxxxxxxxxx>
>>
>> Document the device tree bindings for UFS host controller on
>> Qualcomm SA8255P platform which integrates firmware-managed
>> resources.
>>
>> The platform firmware implements the SCMI server and manages
>> resources such as the PHY, clocks, regulators and resets via the
>> SCMI power protocol. As a result, the OS-visible DT only describes
>> the controller’s MMIO, interrupt, IOMMU and power-domain interfaces.
>>
>> The generic "qcom,ufshc" and "jedec,ufs-2.0" compatible strings are
>> removed from the binding, since this firmware managed design won't
>> be compatible with the drivers doing full resource management.
>>
>> Co-developed-by: Anjana Hari <quic_ahari@xxxxxxxxxxx>
>> Signed-off-by: Anjana Hari <quic_ahari@xxxxxxxxxxx>
>> Signed-off-by: Ram Kumar Dwivedi <quic_rdwivedi@xxxxxxxxxxx>
>> ---
>>  .../bindings/ufs/qcom,sa8255p-ufshc.yaml      | 63 +++++++++++++++++++
>>  1 file changed, 63 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/ufs/qcom,sa8255p-ufshc.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/ufs/qcom,sa8255p-ufshc.yaml b/Documentation/devicetree/bindings/ufs/qcom,sa8255p-ufshc.yaml
>> new file mode 100644
>> index 000000000000..3b31f6282feb
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/ufs/qcom,sa8255p-ufshc.yaml
>> @@ -0,0 +1,63 @@
>> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/ufs/qcom,sa8255p-ufshc.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Qualcomm SA8255P UFS Host Controller
>> +
>> +maintainers:
>> +  - Ram Kumar Dwivedi <ram.dwivedi@xxxxxxxxxxxxxxxx>
>> +  - Anjana Hari <quic_ahari@xxxxxxxxxxx>
>> +
>> +properties:
>> +  compatible:
>> +    const: qcom,sa8255p-ufshc
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  interrupts:
>> +    maxItems: 1
>> +
>> +  iommus:
>> +    maxItems: 1
>> +
>> +  dma-coherent:
> 
> Just :true.
> 
>> +    type: boolean

Hi Krzysztof,

I have updated this in latest patchset.

Thanks,
Ram.

> 
> Best regards,
> Krzysztof
>