2 * Samsung S2MPS11/13/14/15 and S2MPU02 Voltage and Current Regulator
4 The Samsung S2MPS11 is a multi-function device which includes voltage and
5 current regulators, RTC, charger controller and other sub-blocks. It is
6 interfaced to the host controller using an I2C interface. Each sub-block is
7 addressed by the host system using different I2C slave addresses.
10 - compatible: Should be one of the following
11 - "samsung,s2mps11-pmic"
12 - "samsung,s2mps13-pmic"
13 - "samsung,s2mps14-pmic"
14 - "samsung,s2mps15-pmic"
15 - "samsung,s2mpu02-pmic".
16 - reg: Specifies the I2C slave address of the pmic block. It should be 0x66.
19 - interrupt-parent: Specifies the phandle of the interrupt controller to which
20 the interrupts from s2mps11 are delivered to.
21 - interrupts: Interrupt specifiers for interrupt sources.
22 - samsung,s2mps11-wrstbi-ground: Indicates that WRSTBI pin of PMIC is pulled
23 down. When the system is suspended it will always go down thus triggerring
24 unwanted buck warm reset (setting buck voltages to default values).
27 - clocks: s2mps11, s2mps13, s2mps15 and s5m8767 provide three(AP/CP/BT) buffered 32.768
28 KHz outputs, so to register these as clocks with common clock framework
29 instantiate a sub-node named "clocks". It uses the common clock binding
31 [Documentation/devicetree/bindings/clock/clock-bindings.txt]
32 The s2mps14 provides two (AP/BT) buffered 32.768 KHz outputs.
33 - #clock-cells: should be 1.
35 - The following is the list of clocks generated by the controller. Each clock
36 is assigned an identifier and client nodes use this identifier to specify
37 the clock which they consume.
39 ----------------------------------------------------------
40 32KhzAP 0 S2MPS11, S2MPS13, S2MPS14, S2MPS15, S5M8767
41 32KhzCP 1 S2MPS11, S2MPS13, S2MPS15, S5M8767
42 32KhzBT 2 S2MPS11, S2MPS13, S2MPS14, S2MPS15, S5M8767
44 - compatible: Should be one of: "samsung,s2mps11-clk", "samsung,s2mps13-clk",
45 "samsung,s2mps14-clk", "samsung,s5m8767-clk"
46 The s2msp15 uses the same compatible as s2mps13, as both provides similar clocks.
48 - regulators: The regulators of s2mps11 that have to be instantiated should be
49 included in a sub-node named 'regulators'. Regulator nodes included in this
50 sub-node should be of the format as listed below.
53 [standard regulator constraints....];
56 regulator-ramp-delay for BUCKs = [6250/12500/25000(default)/50000] uV/us
58 BUCK[2/3/4/6] supports disabling ramp delay on hardware, so explicitly
59 regulator-ramp-delay = <0> can be used for them to disable ramp delay.
60 In the absence of the regulator-ramp-delay property, the default ramp
63 NOTE: Some BUCKs share the ramp rate setting i.e. same ramp value will be set
64 for a particular group of BUCKs. So provide same regulator-ramp-delay<value>.
65 Grouping of BUCKs sharing ramp rate setting is as follow : BUCK[1, 6],
66 BUCK[3, 4], and BUCK[7, 8, 10]
68 On S2MPS14 the LDO10, LDO11 and LDO12 can be configured to external control
69 over GPIO. To turn this feature on this property must be added to the regulator
71 - samsung,ext-control-gpios: GPIO specifier for one GPIO
72 controlling this regulator (enable/disable);
75 regulator-name = "V_EMMC_2.8V";
76 regulator-min-microvolt = <2800000>;
77 regulator-max-microvolt = <2800000>;
78 samsung,ext-control-gpios = <&gpk0 2 0>;
82 The regulator constraints inside the regulator nodes use the standard regulator
83 bindings which are documented elsewhere.
85 The following are the names of the regulators that the s2mps11 pmic block
86 supports. Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number
87 as per the datasheet of s2mps11.
90 - valid values for n are:
96 - Example: LDO1, LDO2, LDO28
98 - valid values for n are:
104 - Example: BUCK1, BUCK2, BUCK9
109 compatible = "samsung,s2mps11-pmic";
113 compatible = "samsung,s2mps11-clk";
115 clock-output-names = "xx", "yy", "zz";
120 regulator-name = "VDD_ABB_3.3V";
121 regulator-min-microvolt = <3300000>;
122 regulator-max-microvolt = <3300000>;
126 regulator-name = "VDD_ALIVE_1.1V";
127 regulator-min-microvolt = <1100000>;
128 regulator-max-microvolt = <1100000>;
133 regulator-name = "vdd_mif";
134 regulator-min-microvolt = <950000>;
135 regulator-max-microvolt = <1350000>;
141 regulator-name = "vdd_arm";
142 regulator-min-microvolt = <950000>;
143 regulator-max-microvolt = <1350000>;
146 regulator-ramp-delay = <50000>;