找某个设备的设备树电源管理节点

来源：互联网发布：郑州经开区网络维修编辑：程序博客网时间：2024/04/30 13:46

以tp为例
1.找到tp的设备节点，同时找到其中的vdd_ana-supply和vcc_i2c-supply：

    goodix_ts@40 {            ...            vdd_ana-supply = <&pm8916_l17>;            vcc_i2c-supply = <&pm8916_l6>;            ...        };

2.打开电源管理设备树，搜索pm8916_l17和pm8916_l6，可以添加regulator-always-on来让这设备常开
msm8916-regulator.dtsi
中找到了

    rpm-regulator-ldoa6 {        status = "okay";        pm8916_l6: regulator-l6 {            regulator-min-microvolt = <1800000>;            regulator-max-microvolt = <1800000>;            qcom,init-voltage = <1800000>;            status = "okay";            regulator-always-on;        };    };    rpm-regulator-ldoa17 {        status = "okay";        pm8916_l17: regulator-l17 {            regulator-min-microvolt = <2850000>;            regulator-max-microvolt = <2850000>;            qcom,init-voltage = <2850000>;            status = "okay";            regulator-always-on;        };    };

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