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8d7c7726ce
Add bindings documentation for S2MPS14 device to the s2mps11 driver. Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Cc: Mark Brown <broonie@kernel.org> Cc: Liam Girdwood <lgirdwood@gmail.com> Cc: Tomasz Figa <t.figa@samsung.com> Cc: devicetree@vger.kernel.org Cc: Rob Herring <robh+dt@kernel.org> Cc: Pawel Moll <pawel.moll@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Ian Campbell <ijc+devicetree@hellion.org.uk> Cc: Kumar Gala <galak@codeaurora.org> Acked-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
115 lines
3.6 KiB
Plaintext
115 lines
3.6 KiB
Plaintext
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* Samsung S2MPS11 and S2MPS14 Voltage and Current Regulator
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The Samsung S2MPS11 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 an I2C interface. Each sub-block is
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addressed by the host system using different I2C slave addresses.
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Required properties:
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- compatible: Should be "samsung,s2mps11-pmic" or "samsung,s2mps14-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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- clocks: s2mps11 provides three(AP/CP/BT) buffered 32.768 KHz outputs, so to
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register these as clocks with common clock framework instantiate a sub-node
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named "clocks". It uses the common clock binding documented in :
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[Documentation/devicetree/bindings/clock/clock-bindings.txt]
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- #clock-cells: should be 1.
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- The following is the list of clocks generated by the controller. Each clock
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is assigned an identifier and client nodes use this identifier to specify
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the clock which they consume.
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Clock ID
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----------------------
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32KhzAP 0
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32KhzCP 1
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32KhzBT 2
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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 the absence of the regulator-ramp-delay property, the default ramp
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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:
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- S2MPS11: 1 to 38
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- S2MPS14: 1 to 25
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- Example: LDO1, LD02, LDO28
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- BUCKn
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- valid values for n are:
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- S2MPS11: 1 to 10
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- S2MPS14: 1 to 5
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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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s2m_osc: clocks{
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#clock-cells = 1;
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clock-output-names = "xx", "yy", "zz";
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};
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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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