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-
-* Samsung S2MPS11/13/14/15 and S2MPU02 Voltage and Current Regulator
-
-The Samsung S2MPS11 is a multi-function device which includes voltage and
-current regulators, RTC, charger controller and other sub-blocks. It is
-interfaced to the host controller using an I2C interface. Each sub-block is
-addressed by the host system using different I2C slave addresses.
-
-Required properties:
-- compatible: Should be one of the following
- - "samsung,s2mps11-pmic"
- - "samsung,s2mps13-pmic"
- - "samsung,s2mps14-pmic"
- - "samsung,s2mps15-pmic"
- - "samsung,s2mpu02-pmic".
-- reg: Specifies the I2C slave address of the pmic block. It should be 0x66.
-
-Optional properties:
-- interrupt-parent: Specifies the phandle of the interrupt controller to which
- the interrupts from s2mps11 are delivered to.
-- interrupts: Interrupt specifiers for interrupt sources.
-- samsung,s2mps11-wrstbi-ground: Indicates that WRSTBI pin of PMIC is pulled
- down. When the system is suspended it will always go down thus triggerring
- unwanted buck warm reset (setting buck voltages to default values).
-- samsung,s2mps11-acokb-ground: Indicates that ACOKB pin of S2MPS11 PMIC is
- connected to the ground so the PMIC must manually set PWRHOLD bit in CTRL1
- register to turn off the power. Usually the ACOKB is pulled up to VBATT so
- when PWRHOLD pin goes low, the rising ACOKB will trigger power off.
-
-Optional nodes:
-- clocks: s2mps11, s2mps13, s2mps15 and s5m8767 provide three(AP/CP/BT) buffered 32.768
- KHz outputs, so to register these as clocks with common clock framework
- instantiate a sub-node named "clocks". It uses the common clock binding
- documented in :
- [Documentation/devicetree/bindings/clock/clock-bindings.txt]
- The s2mps14 provides two (AP/BT) buffered 32.768 KHz outputs.
- - #clock-cells: should be 1.
-
- - The following is the list of clocks generated by the controller. Each clock
- is assigned an identifier and client nodes use this identifier to specify
- the clock which they consume.
- Clock ID Devices
- ----------------------------------------------------------
- 32KhzAP 0 S2MPS11, S2MPS13, S2MPS14, S2MPS15, S5M8767
- 32KhzCP 1 S2MPS11, S2MPS13, S2MPS15, S5M8767
- 32KhzBT 2 S2MPS11, S2MPS13, S2MPS14, S2MPS15, S5M8767
-
- - compatible: Should be one of: "samsung,s2mps11-clk", "samsung,s2mps13-clk",
- "samsung,s2mps14-clk", "samsung,s5m8767-clk"
- The s2msp15 uses the same compatible as s2mps13, as both provides similar clocks.
-
-- regulators: The regulators of s2mps11 that have to be instantiated should be
-included in a sub-node named 'regulators'. Regulator nodes included in this
-sub-node should be of the format as listed below.
-
- regulator_name {
- [standard regulator constraints....];
- };
-
- regulator-ramp-delay for BUCKs = [6250/12500/25000(default)/50000] uV/us
-
- BUCK[2/3/4/6] supports disabling ramp delay on hardware, so explicitly
- regulator-ramp-delay = <0> can be used for them to disable ramp delay.
- In the absence of the regulator-ramp-delay property, the default ramp
- delay will be used.
-
-NOTE: Some BUCKs share the ramp rate setting i.e. same ramp value will be set
-for a particular group of BUCKs. So provide same regulator-ramp-delay<value>.
-Grouping of BUCKs sharing ramp rate setting is as follow : BUCK[1, 6],
-BUCK[3, 4], and BUCK[7, 8, 10]
-
-On S2MPS14 the LDO10, LDO11 and LDO12 can be configured to external control
-over GPIO. To turn this feature on this property must be added to the regulator
-sub-node:
- - samsung,ext-control-gpios: GPIO specifier for one GPIO
- controlling this regulator (enable/disable);
-Example:
- LDO12 {
- regulator-name = "V_EMMC_2.8V";
- regulator-min-microvolt = <2800000>;
- regulator-max-microvolt = <2800000>;
- samsung,ext-control-gpios = <&gpk0 2 0>;
- };
-
-
-The regulator constraints inside the regulator nodes use the standard regulator
-bindings which are documented elsewhere.
-
-The following are the names of the regulators that the s2mps11 pmic block
-supports. Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number
-as per the datasheet of s2mps11.
-
- - LDOn
- - valid values for n are:
- - S2MPS11: 1 to 38
- - S2MPS13: 1 to 40
- - S2MPS14: 1 to 25
- - S2MPS15: 1 to 27
- - S2MPU02: 1 to 28
- - Example: LDO1, LDO2, LDO28
- - BUCKn
- - valid values for n are:
- - S2MPS11: 1 to 10
- - S2MPS13: 1 to 10
- - S2MPS14: 1 to 5
- - S2MPS15: 1 to 10
- - S2MPU02: 1 to 7
- - Example: BUCK1, BUCK2, BUCK9
-
-Example:
-
- s2mps11_pmic@66 {
- compatible = "samsung,s2mps11-pmic";
- reg = <0x66>;
-
- s2m_osc: clocks {
- compatible = "samsung,s2mps11-clk";
- #clock-cells = <1>;
- clock-output-names = "xx", "yy", "zz";
- };
-
- regulators {
- ldo1_reg: LDO1 {
- regulator-name = "VDD_ABB_3.3V";
- regulator-min-microvolt = <3300000>;
- regulator-max-microvolt = <3300000>;
- };
-
- ldo2_reg: LDO2 {
- regulator-name = "VDD_ALIVE_1.1V";
- regulator-min-microvolt = <1100000>;
- regulator-max-microvolt = <1100000>;
- regulator-always-on;
- };
-
- buck1_reg: BUCK1 {
- regulator-name = "vdd_mif";
- regulator-min-microvolt = <950000>;
- regulator-max-microvolt = <1350000>;
- regulator-always-on;
- regulator-boot-on;
- };
-
- buck2_reg: BUCK2 {
- regulator-name = "vdd_arm";
- regulator-min-microvolt = <950000>;
- regulator-max-microvolt = <1350000>;
- regulator-always-on;
- regulator-boot-on;
- regulator-ramp-delay = <50000>;
- };
- };
- };