This patch series adds a driver and device tree binding documentation for PMIC regulator control via Resource Power Manager-hardened (RPMh) on some Qualcomm Technologies, Inc. SoCs such as SDM845. RPMh is a hardware block which contains several accelerators which are used to manage various hardware resources that are shared between the processors of the SoC. The final hardware state of a regulator is determined within RPMh by performing max aggregation of the requests made by all of the processors. The RPMh regulator driver depends upon the RPMh driver [1] and command DB driver [2] which are both still undergoing review. It also depends upon three recent regulator changes: [3], [4], and [5]. Changes since v4 [6]: - Removed support for DT properties qcom,regulator-drms-modes and qcom,drms-mode-max-microamps - Specified fixed DRMS high power mode minimum limits for LDO type regulators - Removed DRMS support for SMPS and BOB type regulators - Simplified voltage caching logic Changes since v3 [7]: - Removed support for DT properties qcom,regulator-initial-microvolt and qcom,headroom-microvolt - Renamed DT property qcom,allowed-drms-modes to be qcom,regulator-drms-modes - Updated DT binding documentation to mention which common regulator bindings can be used for qcom-rpmh-regulator devices - Added voltage caching so that voltage requests are only sent to RPMh after the regulator has been enabled at least once - Changed 'voltage_selector' default value to be -ENOTRECOVERABLE to interact with [5] - Initialized 'enabled' to -EINVAL so that unused regulators are disabled by regulator_late_cleanup() - Removed rpmh_regulator_load_default_parameters() as it is no longer needed - Updated the mode usage description in qcom,rpmh-regulator.h Changes since v2 [8]: - Replaced '_' with '-' in device tree supply property names - Renamed qcom_rpmh-regulator.c to be qcom-rpmh-regulator.c - Updated various DT property names to use "microvolt" and "microamp" - Moved allowed modes constraint specification out of the driver [4] - Replaced rpmh_client with device pointer to match new RPMh API [1] - Corrected drms mode threshold checking - Initialized voltage_selector to -EINVAL when not specified in DT - Added constants for PMIC regulator hardware modes - Corrected type sign of mode mapping tables - Made variable names for mode arrays plural - Simplified Kconfig depends on - Removed unnecessary constants and struct fields - Added some descriptive comments Changes since v1 [9]: - Addressed review feedback from Doug, Mark, and Stephen - Replaced set_voltage()/get_voltage() callbacks with set_voltage_sel()/ get_voltage_sel() - Added set_bypass()/get_bypass() callbacks for BOB pass-through mode control - Removed top-level PMIC data structures - Removed initialization variables from structs and passed them as function parameters - Removed various comments and error messages - Simplified mode handling - Refactored per-PMIC rpmh-regulator data specification - Simplified probe function - Moved header into DT patch - Removed redundant property listings from DT binding documentation [1]: https://lkml.org/lkml/2018/5/9/729 [2]: https://lkml.org/lkml/2018/4/10/714 [3]: https://lkml.org/lkml/2018/4/18/556 [4]: https://lkml.org/lkml/2018/5/11/696 [5]: https://lkml.org/lkml/2018/5/15/1005 [6]: https://lkml.org/lkml/2018/5/22/1168 [7]: https://lkml.org/lkml/2018/5/11/701 [8]: https://lkml.org/lkml/2018/4/13/687 [9]: https://lkml.org/lkml/2018/3/16/1431 David Collins (2): regulator: dt-bindings: add QCOM RPMh regulator bindings regulator: add QCOM RPMh regulator driver .../bindings/regulator/qcom,rpmh-regulator.txt | 160 +++++ drivers/regulator/Kconfig | 9 + drivers/regulator/Makefile | 1 + drivers/regulator/qcom-rpmh-regulator.c | 770 +++++++++++++++++++++ .../dt-bindings/regulator/qcom,rpmh-regulator.h | 36 + 5 files changed, 976 insertions(+) create mode 100644 Documentation/devicetree/bindings/regulator/qcom,rpmh-regulator.txt create mode 100644 drivers/regulator/qcom-rpmh-regulator.c create mode 100644 include/dt-bindings/regulator/qcom,rpmh-regulator.h -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
