mcp16502-regulator.txt

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    1 MCP16502 PMIC
    2 
    3 Required properties:
    4 - compatible: "microchip,mcp16502"
    5 - reg: I2C slave address
    6 - lpm-gpios: GPIO for LPM pin. Note that this GPIO *must* remain high during
    7              suspend-to-ram, keeping the PMIC into HIBERNATE mode; this
    8              property is optional;
    9 - regulators: A node that houses a sub-node for each regulator within
   10               the device. Each sub-node is identified using the node's
   11               name. The content of each sub-node is defined by the
   12               standard binding for regulators; see regulator.txt.
   13 
   14 Regulators of MCP16502 PMIC:
   15 1) VDD_IO       - Buck (1.2 - 3.7 V)
   16 2) VDD_DDR      - Buck (0.6 - 1.85 V)
   17 3) VDD_CORE     - Buck (0.6 - 1.85 V)
   18 4) VDD_OTHER    - BUCK (0.6 - 1.85 V)
   19 5) LDO1         - LDO  (1.2 - 3.7 V)
   20 6) LDO2         - LDO  (1.2 - 3.7 V)
   21 
   22 Regulator modes:
   23 2 - FPWM: higher precision, higher consumption
   24 4 - AutoPFM: lower precision, lower consumption
   25 
   26 Each regulator is defined using the standard binding for regulators.
   27 
   28 Example:
   29 
   30 mcp16502@5b {
   31         compatible = "microchip,mcp16502";
   32         reg = <0x5b>;
   33         status = "okay";
   34         lpm-gpios = <&pioBU 7 GPIO_ACTIVE_HIGH>;
   35 
   36         regulators {
   37                 VDD_IO {
   38                         regulator-name = "VDD_IO";
   39                         regulator-min-microvolt = <1200000>;
   40                         regulator-max-microvolt = <3700000>;
   41                         regulator-initial-mode = <2>;
   42                         regulator-allowed-modes = <2>, <4>;
   43                         regulator-always-on;
   44 
   45                         regulator-state-standby {
   46                                 regulator-on-in-suspend;
   47                                 regulator-mode = <4>;
   48                         };
   49 
   50                         regulator-state-mem {
   51                                 regulator-off-in-suspend;
   52                                 regulator-mode = <4>;
   53                         };
   54                 };
   55 
   56                 VDD_DDR {
   57                         regulator-name = "VDD_DDR";
   58                         regulator-min-microvolt = <600000>;
   59                         regulator-max-microvolt = <1850000>;
   60                         regulator-initial-mode = <2>;
   61                         regulator-allowed-modes = <2>, <4>;
   62                         regulator-always-on;
   63 
   64                         regulator-state-standby {
   65                                 regulator-on-in-suspend;
   66                                 regulator-mode = <4>;
   67                         };
   68 
   69                         regulator-state-mem {
   70                                 regulator-on-in-suspend;
   71                                 regulator-mode = <4>;
   72                         };
   73                 };
   74 
   75                 VDD_CORE {
   76                         regulator-name = "VDD_CORE";
   77                         regulator-min-microvolt = <600000>;
   78                         regulator-max-microvolt = <1850000>;
   79                         regulator-initial-mode = <2>;
   80                         regulator-allowed-modes = <2>, <4>;
   81                         regulator-always-on;
   82 
   83                         regulator-state-standby {
   84                                 regulator-on-in-suspend;
   85                                 regulator-mode = <4>;
   86                         };
   87 
   88                         regulator-state-mem {
   89                                 regulator-off-in-suspend;
   90                                 regulator-mode = <4>;
   91                         };
   92                 };
   93 
   94                 VDD_OTHER {
   95                         regulator-name = "VDD_OTHER";
   96                         regulator-min-microvolt = <600000>;
   97                         regulator-max-microvolt = <1850000>;
   98                         regulator-initial-mode = <2>;
   99                         regulator-allowed-modes = <2>, <4>;
  100                         regulator-always-on;
  101 
  102                         regulator-state-standby {
  103                                 regulator-on-in-suspend;
  104                                 regulator-mode = <4>;
  105                         };
  106 
  107                         regulator-state-mem {
  108                                 regulator-off-in-suspend;
  109                                 regulator-mode = <4>;
  110                         };
  111                 };
  112 
  113                 LDO1 {
  114                         regulator-name = "LDO1";
  115                         regulator-min-microvolt = <1200000>;
  116                         regulator-max-microvolt = <3700000>;
  117                         regulator-always-on;
  118 
  119                         regulator-state-standby {
  120                                 regulator-on-in-suspend;
  121                         };
  122 
  123                         regulator-state-mem {
  124                                 regulator-off-in-suspend;
  125                         };
  126                 };
  127 
  128                 LDO2 {
  129                         regulator-name = "LDO2";
  130                         regulator-min-microvolt = <1200000>;
  131                         regulator-max-microvolt = <3700000>;
  132                         regulator-always-on;
  133 
  134                         regulator-state-standby {
  135                                 regulator-on-in-suspend;
  136                         };
  137 
  138                         regulator-state-mem {
  139                                 regulator-off-in-suspend;
  140                         };
  141                 };
  142 
  143         };
  144 };

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sys/contrib/device-tree/Bindings/regulator/mcp16502-regulator.txt