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1Binding for NVIDIA Tegra20 CPUFreq2==================================3 4Required properties:5- clocks: Must contain an entry for the CPU clock.6 See ../clocks/clock-bindings.txt for details.7- operating-points-v2: See ../bindings/opp/opp-v2.yaml for details.8- #cooling-cells: Should be 2. See ../thermal/thermal-cooling-devices.yaml for details.9 10For each opp entry in 'operating-points-v2' table:11- opp-supported-hw: Two bitfields indicating:12 On Tegra20:13 1. CPU process ID mask14 2. SoC speedo ID mask15 16 On Tegra30:17 1. CPU process ID mask18 2. CPU speedo ID mask19 20 A bitwise AND is performed against these values and if any bit21 matches, the OPP gets enabled.22 23- opp-microvolt: CPU voltage triplet.24 25Optional properties:26- cpu-supply: Phandle to the CPU power supply.27 28Example:29 regulators {30 cpu_reg: regulator0 {31 regulator-name = "vdd_cpu";32 };33 };34 35 cpu0_opp_table: opp_table0 {36 compatible = "operating-points-v2";37 38 opp@456000000 {39 clock-latency-ns = <125000>;40 opp-microvolt = <825000 825000 1125000>;41 opp-supported-hw = <0x03 0x0001>;42 opp-hz = /bits/ 64 <456000000>;43 };44 45 ...46 };47 48 cpus {49 cpu@0 {50 compatible = "arm,cortex-a9";51 clocks = <&tegra_car TEGRA20_CLK_CCLK>;52 operating-points-v2 = <&cpu0_opp_table>;53 cpu-supply = <&cpu_reg>;54 #cooling-cells = <2>;55 };56 };57