summaryrefslogtreecommitdiff
path: root/Documentation/devicetree/bindings/mfd/s2mps11.txt
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/devicetree/bindings/mfd/s2mps11.txt')
-rw-r--r--Documentation/devicetree/bindings/mfd/s2mps11.txt109
1 files changed, 109 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mfd/s2mps11.txt b/Documentation/devicetree/bindings/mfd/s2mps11.txt
new file mode 100644
index 000000000000..c9332c626021
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/s2mps11.txt
@@ -0,0 +1,109 @@
+
+* Samsung S2MPS11 Voltage and Current Regulator
+
+The Samsung S2MP211 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 a I2C interface. Each sub-block is
+addressed by the host system using different I2C slave address.
+
+Required properties:
+- compatible: Should be "samsung,s2mps11-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.
+
+Optional nodes:
+- clocks: s2mps11 provides 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]
+ - #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
+ ----------------------
+ 32KhzAP 0
+ 32KhzCP 1
+ 32KhzBT 2
+
+- 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 explictly
+ regulator-ramp-delay = <0> can be used for them to disable ramp delay.
+ In absence of regulator-ramp-delay property, 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]
+
+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 1 to 28
+ - Example: LDO0, LD01, LDO28
+ - BUCKn
+ - valid values for n are 1 to 9.
+ - Example: BUCK1, BUCK2, BUCK9
+
+Example:
+
+ s2mps11_pmic@66 {
+ compatible = "samsung,s2mps11-pmic";
+ reg = <0x66>;
+
+ s2m_osc: clocks{
+ #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>;
+ };
+ };
+ };