Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt

   1 * Universal Flash Storage (UFS) Host Controller
   2
   3 UFSHC nodes are defined to describe on-chip UFS host controllers.
   4 Each UFS controller instance should have its own node.
   5
   6 Required properties:
   7 - compatible            : must contain "jedec,ufs-1.1", may also list one or more
   8                                           of the following:
   9                                           "qcom,msm8994-ufshc"
  10                                           "qcom,msm8996-ufshc"
  11                                           "qcom,ufshc"
  12 - interrupts        : <interrupt mapping for UFS host controller IRQ>
  13 - reg               : <registers mapping>
  14
  15 Optional properties:
  16 - phys                  : phandle to UFS PHY node
  17 - phy-names             : the string "ufsphy" when is found in a node, along
  18                           with "phys" attribute, provides phandle to UFS PHY node
  19 - vdd-hba-supply        : phandle to UFS host controller supply regulator node
  20 - vcc-supply            : phandle to VCC supply regulator node
  21 - vccq-supply           : phandle to VCCQ supply regulator node
  22 - vccq2-supply          : phandle to VCCQ2 supply regulator node
  23 - vcc-supply-1p8        : For embedded UFS devices, valid VCC range is 1.7-1.95V
  24                           or 2.7-3.6V. This boolean property when set, specifies
  25                           to use low voltage range of 1.7-1.95V. Note for external
  26                           UFS cards this property is invalid and valid VCC range is
  27                           always 2.7-3.6V.
  28 - vcc-max-microamp      : specifies max. load that can be drawn from vcc supply
  29 - vccq-max-microamp     : specifies max. load that can be drawn from vccq supply
  30 - vccq2-max-microamp    : specifies max. load that can be drawn from vccq2 supply
  31 - <name>-fixed-regulator : boolean property specifying that <name>-supply is a fixed regulator
  32
  33 - clocks                : List of phandle and clock specifier pairs
  34 - clock-names           : List of clock input name strings sorted in the same
  35                           order as the clocks property.
  36 - freq-table-hz         : Array of <min max> operating frequencies stored in the same
  37                           order as the clocks property. If this property is not
  38                           defined or a value in the array is "0" then it is assumed
  39                           that the frequency is set by the parent clock or a
  40                           fixed rate clock source.
  41 -lanes-per-direction    : number of lanes available per direction - either 1 or 2.
  42                           Note that it is assume same number of lanes is used both
  43                           directions at once. If not specified, default is 2 lanes per direction.
  44
  45 Note: If above properties are not defined it can be assumed that the supply
  46 regulators or clocks are always on.
  47
  48 Example:
  49         ufshc@0xfc598000 {
  50                 compatible = "jedec,ufs-1.1";
  51                 reg = <0xfc598000 0x800>;
  52                 interrupts = <0 28 0>;
  53
  54                 vdd-hba-supply = <&xxx_reg0>;
  55                 vdd-hba-fixed-regulator;
  56                 vcc-supply = <&xxx_reg1>;
  57                 vcc-supply-1p8;
  58                 vccq-supply = <&xxx_reg2>;
  59                 vccq2-supply = <&xxx_reg3>;
  60                 vcc-max-microamp = 500000;
  61                 vccq-max-microamp = 200000;
  62                 vccq2-max-microamp = 200000;
  63
  64                 clocks = <&core 0>, <&ref 0>, <&iface 0>;
  65                 clock-names = "core_clk", "ref_clk", "iface_clk";
  66                 freq-table-hz = <100000000 200000000>, <0 0>, <0 0>;
  67                 phys = <&ufsphy1>;
  68                 phy-names = "ufsphy";
  69         };