90 lines
2.8 KiB
Plaintext
90 lines
2.8 KiB
Plaintext
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* Samsung S2MPS11 Voltage and Current Regulator
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The Samsung S2MP211 is a multi-function device which includes voltage and
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current regulators, RTC, charger controller and other sub-blocks. It is
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interfaced to the host controller using a I2C interface. Each sub-block is
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addressed by the host system using different I2C slave address.
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Required properties:
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- compatible: Should be "samsung,s2mps11-pmic".
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- reg: Specifies the I2C slave address of the pmic block. It should be 0x66.
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Optional properties:
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- interrupt-parent: Specifies the phandle of the interrupt controller to which
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the interrupts from s2mps11 are delivered to.
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- interrupts: Interrupt specifiers for interrupt sources.
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Optional nodes:
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- regulators: The regulators of s2mps11 that have to be instantiated should be
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included in a sub-node named 'regulators'. Regulator nodes included in this
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sub-node should be of the format as listed below.
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regulator_name {
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[standard regulator constraints....];
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};
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regulator-ramp-delay for BUCKs = [6250/12500/25000(default)/50000] uV/us
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BUCK[2/3/4/6] supports disabling ramp delay on hardware, so explictly
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regulator-ramp-delay = <0> can be used for them to disable ramp delay.
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In absence of regulator-ramp-delay property, default ramp delay will be used.
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NOTE: Some BUCKs share the ramp rate setting i.e. same ramp value will be set
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for a particular group of BUCKs. So provide same regulator-ramp-delay<value>.
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Grouping of BUCKs sharing ramp rate setting is as follow : BUCK[1, 6],
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BUCK[3, 4], and BUCK[7, 8, 10]
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The regulator constraints inside the regulator nodes use the standard regulator
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bindings which are documented elsewhere.
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The following are the names of the regulators that the s2mps11 pmic block
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supports. Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number
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as per the datasheet of s2mps11.
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- LDOn
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- valid values for n are 1 to 28
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- Example: LDO0, LD01, LDO28
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- BUCKn
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- valid values for n are 1 to 9.
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- Example: BUCK1, BUCK2, BUCK9
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Example:
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s2mps11_pmic@66 {
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compatible = "samsung,s2mps11-pmic";
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reg = <0x66>;
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regulators {
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ldo1_reg: LDO1 {
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regulator-name = "VDD_ABB_3.3V";
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regulator-min-microvolt = <3300000>;
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regulator-max-microvolt = <3300000>;
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};
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ldo2_reg: LDO2 {
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regulator-name = "VDD_ALIVE_1.1V";
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regulator-min-microvolt = <1100000>;
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regulator-max-microvolt = <1100000>;
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regulator-always-on;
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};
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buck1_reg: BUCK1 {
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regulator-name = "vdd_mif";
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regulator-min-microvolt = <950000>;
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regulator-max-microvolt = <1350000>;
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regulator-always-on;
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regulator-boot-on;
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};
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buck2_reg: BUCK2 {
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regulator-name = "vdd_arm";
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regulator-min-microvolt = <950000>;
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regulator-max-microvolt = <1350000>;
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regulator-always-on;
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regulator-boot-on;
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regulator-ramp-delay = <50000>;
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};
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};
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};
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