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OPP framework can be used to scale the clocks along with other entities such as regulators, performance state etc... So let's add support for parsing OPP from devicetree. OPP support in devicetree is added through the "operating-points-v2" property which accepts the OPP table defining clock frequency, regulator voltage, power domain performance state etc... Since the UFS controller requires multiple clocks to be controlled for proper working, devm_pm_opp_set_config() has been used which supports scaling multiple clocks through custom ufshcd_opp_config_clks() callback. It should be noted that the OPP support is not compatible with the old "freq-table-hz" property. So only one can be used at a time even though the UFS core supports both. Co-developed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Link: https://lore.kernel.org/r/20231012172129.65172-4-manivannan.sadhasivam@linaro.org Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> |
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