| Message ID | 20250506163705.31518-2-quic_nitirawa@quicinc.com |
|---|---|
| State | New |
| Headers | show |
| Series | Add support to disable UFS LPM | expand |
On 06/05/2025 18:37, Nitin Rawat wrote: > Disable UFS low power mode on emulation FPGA platforms or other platforms Why wouldn't you like to test LPM also on FPGA designs? I do not see here correlation. > where it is either unsupported or power efficiency is not a critical > requirement. That's a policy, not hardware, thus not suitable for DT. Best regards, Krzysztof
On 5/6/2025 11:46 PM, Krzysztof Kozlowski wrote: > On 06/05/2025 18:37, Nitin Rawat wrote: >> Disable UFS low power mode on emulation FPGA platforms or other platforms > > Why wouldn't you like to test LPM also on FPGA designs? I do not see > here correlation. Hi Krzysztof, Since the FPGA platform doesn't support UFS Low Power Modes (such as the AutoHibern8 feature specified in the UFS specification), I have included this information in the hardware description (i.e dts). Thanks, Nitin > >> where it is either unsupported or power efficiency is not a critical >> requirement. > > That's a policy, not hardware, thus not suitable for DT. > > Best regards, > Krzysztof
diff --git a/Documentation/devicetree/bindings/ufs/ufs-common.yaml b/Documentation/devicetree/bindings/ufs/ufs-common.yaml index 31fe7f30ff5b..eab28beb0e76 100644 --- a/Documentation/devicetree/bindings/ufs/ufs-common.yaml +++ b/Documentation/devicetree/bindings/ufs/ufs-common.yaml @@ -89,6 +89,11 @@ properties: msi-parent: true + disable-lpm: + type: boolean + description: + Disable UFS LPM features. + dependencies: freq-table-hz: [ clocks ] operating-points-v2: [ clocks, clock-names ]
Disable UFS low power mode on emulation FPGA platforms or other platforms where it is either unsupported or power efficiency is not a critical requirement. Document the UFS Disable LPM property for such platforms. Signed-off-by: Nitin Rawat <quic_nitirawa@quicinc.com> --- Documentation/devicetree/bindings/ufs/ufs-common.yaml | 5 +++++ 1 file changed, 5 insertions(+)