Merge "regulator: spm_regulator: Add snapshot of spm_regulator driver"

Qualcomm Technologies Inc. SPM Regulators

spm-regulator is a regulator device which supports PMIC processor supply

regulators via the SPM module.

Required properties:

- compatible:      Must be "qcom,spm-regulator"

- reg:             Specifies the SPMI address and size for this regulator device

- regulator-name:  A string used as a descriptive name for the regulator

Required structure:

- A qcom,spm-regulator node must be a child of an SPMI node that has specified

	the spmi-slave-container property

Optional properties:

- qcom,mode:       A string which specifies the mode to use for the regulator.

		    Supported values are "pwm" and "auto".  PWM mode is more

		    robust, but draws more current than auto mode.  If this

		    property is not specified, then the regulator will remain

		    in whatever mode hardware or bootloaders set it to.

- qcom,cpu-num:    Specifies which CPU this regulator powers.  This property is

		    not need when the SPM regulator is shared between all CPUs.

- qcom,bypass-spm: Boolean flag which indicates that voltage control should not

		    be managed by an SPM.  Instead, the voltage should be

		    controlled via SPMI.

- qcom,max-voltage-step:  Maximum single voltage step size in microvolts.

- qcom,recal-mask: Bit mask of the APSS clusters to recalibrate after each

		    voltage change.  Bit 0 corresponds to the first cluster,

		    bit 1 corresponds to the second cluster, and so on.

Optional structure:

- A child node may be specified within a qcom,spm-regulator node which defines

	an additional regulator which controls the AVS minimum and maximum

	voltage limits.

- The AVS child node must contain these properties defined in regulator.txt:

	regulator-name, regulator-min-microvolt, regulator-max-microvolt.

All properties specified within the core regulator framework can also be used.

These bindings can be found in regulator.txt.

Example:

	qcom,spmi@fc4c0000 {

		qcom,pm8226@1 {

			spmi-slave-container;

			spm-regulator@1700 {

				compatible = "qcom,spm-regulator";

				regulator-name = "8226_s2";

				reg = <0x1700 0x100>;

				regulator-min-microvolt = <900000>;

				regulator-max-microvolt = <1275000>;

				avs-limit-regulator {

					regulator-name = "8226_s2_avs_limit";

					regulator-min-microvolt = <900000>;

					regulator-max-microvolt = <1275000>;

				}

			};

		};

	};

	  be used on systems which contain an RPM which communicates with the

	  application processor over SMD.

config REGULATOR_SPM

	bool "SPM regulator driver"

	depends on SPMI

	help

	  Enable support for the SPM regulator driver which is used for

	  setting voltages of processor supply regulators via the SPM module

	  found inside chips of Qualcomm Technologies Inc. The SPM regulator

	  driver can be used on QTI SoCs where the APSS processor cores are

	  supplied by their own PMIC regulator.

config REGULATOR_STUB

	tristate "Stub Regulator"

	help

obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o

obj-$(CONFIG_REGULATOR_WM8994) += wm8994-regulator.o

obj-$(CONFIG_REGULATOR_RPM_SMD) += rpm-smd-regulator.o

obj-$(CONFIG_REGULATOR_SPM) += spm-regulator.o

obj-$(CONFIG_REGULATOR_RPMH) += rpmh-regulator.o

obj-$(CONFIG_REGULATOR_STUB) += stub-regulator.o