Documentation/devicetree/bindings/drm/msm/gpu.txt

   1 Qualcomm adreno/snapdragon GPU
   2
   3 Required properties:
   4 - compatible: "qcom,adreno-3xx"
   5 - reg: Physical base address and length of the controller's registers.
   6 - interrupts: The interrupt signal from the gpu.
   7 - clocks: device clocks
   8   See ../clocks/clock-bindings.txt for details.
   9 - clock-names: the following clocks are required:
  10   * "core_clk"
  11   * "iface_clk"
  12   * "mem_iface_clk"
  13 - qcom,chipid: gpu chip-id.  Note this may become optional for future
  14   devices if we can reliably read the chipid from hw
  15 - qcom,gpu-pwrlevels: list of operating points
  16   - compatible: "qcom,gpu-pwrlevels"
  17   - for each qcom,gpu-pwrlevel:
  18     - qcom,gpu-freq: requested gpu clock speed
  19     - NOTE: downstream android driver defines additional parameters to
  20       configure memory bandwidth scaling per OPP.
  21
  22 Example:
  23
  24 / {
  25         ...
  26
  27         gpu: qcom,kgsl-3d0@4300000 {
  28                 compatible = "qcom,adreno-3xx";
  29                 reg = <0x04300000 0x20000>;
  30                 reg-names = "kgsl_3d0_reg_memory";
  31                 interrupts = <GIC_SPI 80 0>;
  32                 interrupt-names = "kgsl_3d0_irq";
  33                 clock-names =
  34                     "core_clk",
  35                     "iface_clk",
  36                     "mem_iface_clk";
  37                 clocks =
  38                     <&mmcc GFX3D_CLK>,
  39                     <&mmcc GFX3D_AHB_CLK>,
  40                     <&mmcc MMSS_IMEM_AHB_CLK>;
  41                 qcom,chipid = <0x03020100>;
  42                 qcom,gpu-pwrlevels {
  43                         compatible = "qcom,gpu-pwrlevels";
  44                         qcom,gpu-pwrlevel@0 {
  45                                 qcom,gpu-freq = <450000000>;
  46                         };
  47                         qcom,gpu-pwrlevel@1 {
  48                                 qcom,gpu-freq = <27000000>;
  49                         };
  50                 };
  51         };
  52 };