Documentation/devicetree/bindings/arm/tegra/nvidia,tegra30-actmon.txt

   1 NVIDIA Tegra Activity Monitor
   2
   3 The activity monitor block collects statistics about the behaviour of other
   4 components in the system. This information can be used to derive the rate at
   5 which the external memory needs to be clocked in order to serve all requests
   6 from the monitored clients.
   7
   8 Required properties:
   9 - compatible: should be "nvidia,tegra<chip>-actmon"
  10 - reg: offset and length of the register set for the device
  11 - interrupts: standard interrupt property
  12 - clocks: Must contain a phandle and clock specifier pair for each entry in
  13 clock-names. See ../../clock/clock-bindings.txt for details.
  14 - clock-names: Must include the following entries:
  15   - actmon
  16   - emc
  17 - resets: Must contain an entry for each entry in reset-names. See
  18 ../../reset/reset.txt for details.
  19 - reset-names: Must include the following entries:
  20   - actmon
  21 - operating-points-v2: See ../bindings/opp/opp.txt for details.
  22 - interconnects: Should contain entries for memory clients sitting on
  23                  MC->EMC memory interconnect path.
  24 - interconnect-names: Should include name of the interconnect path for each
  25                       interconnect entry. Consult TRM documentation for
  26                       information about available memory clients, see MEMORY
  27                       CONTROLLER section.
  28
  29 For each opp entry in 'operating-points-v2' table:
  30 - opp-supported-hw: bitfield indicating SoC speedo ID mask
  31 - opp-peak-kBps: peak bandwidth of the memory channel
  32
  33 Example:
  34         dfs_opp_table: opp-table {
  35                 compatible = "operating-points-v2";
  36
  37                 opp@12750000 {
  38                         opp-hz = /bits/ 64 <12750000>;
  39                         opp-supported-hw = <0x000F>;
  40                         opp-peak-kBps = <51000>;
  41                 };
  42                 ...
  43         };
  44
  45         actmon@6000c800 {
  46                 compatible = "nvidia,tegra124-actmon";
  47                 reg = <0x0 0x6000c800 0x0 0x400>;
  48                 interrupts = <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>;
  49                 clocks = <&tegra_car TEGRA124_CLK_ACTMON>,
  50                          <&tegra_car TEGRA124_CLK_EMC>;
  51                 clock-names = "actmon", "emc";
  52                 resets = <&tegra_car 119>;
  53                 reset-names = "actmon";
  54                 operating-points-v2 = <&dfs_opp_table>;
  55                 interconnects = <&mc TEGRA124_MC_MPCORER &emc>;
  56                 interconnect-names = "cpu";
  57         };