.. | .. |
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8 | 8 | on operating-points-v2, but the driver can also create the "cpufreq-dt" |
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9 | 9 | platform_device to compatibility with operating-points. |
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10 | 10 | |
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11 | | -For more information about the expected DT format [See: ../opp/opp.txt]. |
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12 | | - |
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13 | | -Optional properties: |
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14 | | -In 'operating-points-v2' table: |
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15 | | -- rockchip,leakage-voltage-sel: The property is an array of 3-tuples items, and |
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16 | | - each item consists of leakage and voltage selector like |
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17 | | - <min-leakage max-leakage volt-selector>. |
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18 | | - min-leakage: minimum leakage in mA, ranges from 1 to 254. |
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19 | | - max-leakage: maximum leakage in mA, ranges from 1 to 254. |
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20 | | - voltage-selector: a sequence number which is used to math |
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21 | | - opp-microvolt-L<number> roperty in OPP node. |
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22 | | - |
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23 | | -- rockchip,pvtm-voltage-sel: The property is an array of 3-tuples items, and |
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24 | | - each item consists of pvtm and voltage selector like |
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25 | | - <min-pvtm max-pvtm volt-selector>. |
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26 | | - min-pvtm: minimum frequency count in KHz. |
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27 | | - max-pvtm: maximum frequency count in KHz. |
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28 | | - voltage-selector: a sequence number which is used to math |
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29 | | - opp-microvolt-L<number> roperty in OPP node. |
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30 | | -- rockchip,pvtm-freq: Clock frequency in KHz, which is used to set the cpu clock |
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31 | | - frequency before get frequency count of pvtm. |
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32 | | -- rockchip,pvtm-volt: Voltage in uV, which is used to set the cpu voltage before |
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33 | | - get frequency count of pvtm. |
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34 | | -- rockchip,pvtm-ch: An array of two integers containing pvtm channel and clock |
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35 | | - oscillation ring. |
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36 | | -- rockchip,pvtm-sample-time: The number of milliseconds to wait for pvtm to |
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37 | | - finish counting. |
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38 | | -- rockchip,pvtm-number: An integer indicating the number of sampling points. |
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39 | | -- rockchip,pvtm-error: An integer indicating the error between the sample |
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40 | | - results. |
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41 | | -- rockchip,pvtm-ref-temp: The SoC internal temperature in degree centigrade, the |
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42 | | - min-pvtm and max-pvtm in 'leakage-voltage-sel' are |
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43 | | - measured at reference temperature. |
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44 | | -- rockchip,pvtm-temp-prop: An array of two integers containing proportional |
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45 | | - constants which is used to convert the value at current |
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46 | | - temperature to reference temperature. The first one is |
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47 | | - used when current temperature is below reference |
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48 | | - temperature. Conversely, The second one is used when |
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49 | | - current temperature is above reference temperature. |
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50 | | -- rockchip,pvtm-thermal-zone: A thermal zone node containing thermal sensor, |
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51 | | - it's used to get the current temperature. |
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52 | | -- rockchip,thermal-zone: A thermal zone node containing thermal sensor, |
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53 | | - it's used to get the current temperature. |
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54 | | - |
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55 | | -- nvmem-cells: A phandle to cpu_leakage data provided by a nvmem device. |
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56 | | -- nvmem-cell-names: Should be "cpu_leakage" |
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57 | | - |
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58 | | -- rockchip,threshold-freq: Clock frequency in KHz, it's used to reduce power |
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59 | | - for SoCs with two clusters. |
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60 | | -- rockchip,freq-limit: Only one cluster can contain the property, and the |
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61 | | - cluster's maximum frequency will be limited to its |
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62 | | - threshold frequency, if the other cluster's frequency |
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63 | | - is geater than or equal to its threshold frequency. |
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64 | | - |
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65 | | -Examples: |
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66 | | - |
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67 | | -cpus { |
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68 | | - cpu@0 { |
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69 | | - operating-points-v2 = <&cluster0_opp>; |
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70 | | - }; |
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71 | | -} |
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72 | | - |
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73 | | -cluster0_opp: opp_table0 { |
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74 | | - compatible = "operating-points-v2"; |
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75 | | - opp-shared; |
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76 | | - rockchip,leakage-voltage-sel = < |
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77 | | - 1 24 0 |
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78 | | - 25 254 1 |
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79 | | - >; |
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80 | | - nvmem-cells = <&cpu_leakage>; |
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81 | | - nvmem-cell-names = "cpu_leakage"; |
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82 | | - |
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83 | | - opp@216000000 { |
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84 | | - opp-hz = /bits/ 64 <216000000>; |
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85 | | - opp-microvolt = <950000 950000 1350000>; |
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86 | | - opp-microvolt-L0 = <1050000 1050000 1350000>; |
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87 | | - opp-microvolt-L1 = <950000 950000 1350000>; |
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88 | | - opp-suspend; |
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89 | | - } |
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90 | | -}; |
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| 11 | +For more information about the expected DT format [See: ../opp/rockchip-opp.txt]. |
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