Hi, This series adds OPP (Operating Points) support to UFSHCD driver and interconnect support to Qcom UFS driver. Motivation behind adding OPP support is to scale both clocks as well as regulators/performance state dynamically. Currently, UFSHCD just scales clock frequency during runtime with the help of "freq-table-hz" property defined in devicetree. With the addition of OPP tables in devicetree (as done for Qcom SDM845 and SM8250 SoCs in this series) UFSHCD can now scale both clocks and performance state of power domain which helps in power saving. For the addition of OPP support to UFSHCD, there are changes required to the OPP framework and devfreq drivers which are also added in this series. Finally, interconnect support is added to Qcom UFS driver for scaling the interconnect path dynamically. This is required to avoid boot crash in recent SoCs and also to save power during runtime. More information is available in patch 13/13. Credits ======= This series is a continuation of previous work by Krzysztof Kozlowski [1] and Brian Masney [2]. Ideally, this could've split into two series (OPP and interconnect) but since there will be a dependency in the devicetree, I decided to keep them in a single series. Testing ======= This series is tested on 96Boards RB3 (SDM845 SoC) and RB5 (SM8250 SoC) development boards. Merging Strategy ================ An immutable branch might be required between OPP and SCSI trees because of the API dependency (devfreq too). And I leave it up to the maintainers to decide. Thanks, Mani [1] https://lore.kernel.org/all/20220513061347.46480-1-krzysztof.kozlowski@xxxxxxxxxx/ [2] https://lore.kernel.org/all/20221117104957.254648-1-bmasney@xxxxxxxxxx/ Krzysztof Kozlowski (2): dt-bindings: ufs: common: add OPP table arm64: dts: qcom: sdm845: Add OPP table support to UFSHC Manivannan Sadhasivam (12): dt-bindings: opp: Increase maxItems for opp-hz property arm64: dts: qcom: sdm845: Add missing RPMh power domain to GCC arm64: dts: qcom: sdm845: Fix the min frequency of "ice_core_clk" arm64: dts: qcom: sm8250: Add OPP table support to UFSHC OPP: Introduce dev_pm_opp_find_freq_{ceil/floor}_indexed() APIs OPP: Introduce dev_pm_opp_get_freq_indexed() API PM / devfreq: Switch to dev_pm_opp_find_freq_{ceil/floor}_indexed() APIs scsi: ufs: core: Add OPP support for scaling clocks and regulators scsi: ufs: host: Add support for parsing OPP arm64: dts: qcom: sdm845: Add interconnect paths to UFSHC arm64: dts: qcom: sm8250: Add interconnect paths to UFSHC scsi: ufs: qcom: Add support for scaling interconnects .../devicetree/bindings/opp/opp-v2-base.yaml | 2 +- .../devicetree/bindings/ufs/ufs-common.yaml | 34 ++++- arch/arm64/boot/dts/qcom/sdm845.dtsi | 47 ++++-- arch/arm64/boot/dts/qcom/sm8250.dtsi | 43 ++++-- drivers/devfreq/devfreq.c | 14 +- drivers/opp/core.c | 76 ++++++++++ drivers/ufs/core/ufshcd.c | 142 ++++++++++++++---- drivers/ufs/host/ufs-qcom.c | 131 +++++++++++++++- drivers/ufs/host/ufs-qcom.h | 3 + drivers/ufs/host/ufshcd-pltfrm.c | 116 ++++++++++++++ include/linux/pm_opp.h | 26 ++++ include/ufs/ufshcd.h | 4 + 12 files changed, 574 insertions(+), 64 deletions(-) -- 2.25.1
