samsung,s2mps11.txt

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    1 Binding for Samsung S2M family regulator block
    2 ==============================================
    3 
    4 This is a part of device tree bindings for S2M family multi-function devices.
    5 More information can be found in bindings/mfd/sec-core.txt file.
    6 
    7 The S2MPS11/13/14/15 and S2MPU02 devices provide buck and LDO regulators.
    8 
    9 To register these with regulator framework instantiate under main device node
   10 a sub-node named "regulators" with more sub-nodes for each regulator using the
   11 common regulator binding documented in:
   12  - Documentation/devicetree/bindings/regulator/regulator.txt
   13 
   14 
   15 Names of regulators supported by different devices:
   16         - LDOn
   17                   - valid values for n are:
   18                         - S2MPS11: 1 to 38
   19                         - S2MPS13: 1 to 40
   20                         - S2MPS14: 1 to 25
   21                         - S2MPS15: 1 to 27
   22                         - S2MPU02: 1 to 28
   23                   - Example: LDO1, LDO2, LDO28
   24         - BUCKn
   25                   - valid values for n are:
   26                         - S2MPS11: 1 to 10
   27                         - S2MPS13: 1 to 10
   28                         - S2MPS14: 1 to 5
   29                         - S2MPS15: 1 to 10
   30                         - S2MPU02: 1 to 7
   31                   - Example: BUCK1, BUCK2, BUCK9
   32 Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number
   33 as per the datasheet of device.
   34 
   35 
   36 Optional properties of the nodes under "regulators" sub-node:
   37  - regulator-ramp-delay: ramp delay in uV/us. May be 6250, 12500,
   38    25000 (default) or 50000.
   39 
   40    Additionally S2MPS11 supports disabling ramp delay for BUCK{2,3,4,6}
   41    by setting it to <0>.
   42 
   43    Note: On S2MPS11 some bucks share the ramp rate setting i.e. same ramp value
   44    will be set for a particular group of bucks so provide the same
   45    regulator-ramp-delay value for them.
   46    Groups sharing ramp rate:
   47     - buck{1,6},
   48     - buck{3,4},
   49     - buck{7,8,10}.
   50 
   51  - samsung,ext-control-gpios: On S2MPS14 the LDO10, LDO11 and LDO12 can be
   52    configured to external control over GPIO. To turn this feature on this
   53    property must be added to the regulator sub-node:
   54     - samsung,ext-control-gpios: GPIO specifier for one GPIO
   55                                  controlling this regulator (enable/disable)
   56   Example:
   57         LDO12 {
   58                 regulator-name = "V_EMMC_2.8V";
   59                 regulator-min-microvolt = <2800000>;
   60                 regulator-max-microvolt = <2800000>;
   61                 samsung,ext-control-gpios = <&gpk0 2 0>;
   62         };
   63 
   64 
   65 Example:
   66 
   67         s2mps11_pmic@66 {
   68                 compatible = "samsung,s2mps11-pmic";
   69                 reg = <0x66>;
   70 
   71                 regulators {
   72                         ldo1_reg: LDO1 {
   73                                 regulator-name = "VDD_ABB_3.3V";
   74                                 regulator-min-microvolt = <3300000>;
   75                                 regulator-max-microvolt = <3300000>;
   76                         };
   77 
   78                         ldo2_reg: LDO2 {
   79                                 regulator-name = "VDD_ALIVE_1.1V";
   80                                 regulator-min-microvolt = <1100000>;
   81                                 regulator-max-microvolt = <1100000>;
   82                                 regulator-always-on;
   83                         };
   84 
   85                         buck1_reg: BUCK1 {
   86                                 regulator-name = "vdd_mif";
   87                                 regulator-min-microvolt = <950000>;
   88                                 regulator-max-microvolt = <1350000>;
   89                                 regulator-always-on;
   90                                 regulator-boot-on;
   91                         };
   92 
   93                         buck2_reg: BUCK2 {
   94                                 regulator-name = "vdd_arm";
   95                                 regulator-min-microvolt = <950000>;
   96                                 regulator-max-microvolt = <1350000>;
   97                                 regulator-always-on;
   98                                 regulator-boot-on;
   99                                 regulator-ramp-delay = <50000>;
  100                         };
  101                 };
  102         };

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