Documentation/devicetree/bindings/hwlock/qcom-hwspinlock.txt

   1 Qualcomm Hardware Mutex Block:
   2
   3 The hardware block provides mutexes utilized between different processors on
   4 the SoC as part of the communication protocol used by these processors.
   5
   6 - compatible:
   7         Usage: required
   8         Value type: <string>
   9         Definition: must be one of:
  10                     "qcom,sfpb-mutex",
  11                     "qcom,tcsr-mutex"
  12
  13 - syscon:
  14         Usage: required
  15         Value type: <prop-encoded-array>
  16         Definition: one cell containing:
  17                     syscon phandle
  18                     offset of the hwmutex block within the syscon
  19                     stride of the hwmutex registers
  20
  21 - #hwlock-cells:
  22         Usage: required
  23         Value type: <u32>
  24         Definition: must be 1, the specified cell represent the lock id
  25                     (hwlock standard property, see hwlock.txt)
  26
  27 Example:
  28
  29         tcsr_mutex_block: syscon@fd484000 {
  30                 compatible = "syscon";
  31                 reg = <0xfd484000 0x2000>;
  32         };
  33
  34         hwlock@fd484000 {
  35                 compatible = "qcom,tcsr-mutex";
  36                 syscon = <&tcsr_mutex_block 0 0x80>;
  37
  38                 #hwlock-cells = <1>;
  39         };