54 lines
1.9 KiB
Plaintext
54 lines
1.9 KiB
Plaintext
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* QBT1000 (Qualcomm Technologies Inc Ultra-Sonic Fingerprint Sensor)
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1) Main node
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Required properties:
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- compatible : Should be "qcom,qbt1000"
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2) Child nodes
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The main node must have one of the two possible child nodes which describes the
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properties of sensor connection.
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a) Sensor connected to SPI port :
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Node name - qcom,fingerprint-sensor-spi-conn
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Required properties:
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- clock-names : List of clock names that need to be voted on/off
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- clocks : Property pair that represents the clock controller and the clock
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id. This in combimination with the clock-name is used to obtain
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the handle for the clock that needs to be voted on/off
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- clock-frequency : Frequency of clock in Hz
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b) Sensor connected to SSC SPI port :
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Node name - qcom,fingerprint-sensor-ssc-spi-conn
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Required properties:
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- qcom,spi-port-id : SPI port id sensor is connected to
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- qcom,spi-port-slave-index : SPI port slave index
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- qcom,tz-subsys-id : TZ subsystem-id for SCM calls
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- qcom,ssc-subsys-id : SSC subsystem-id for SCM calls
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- clock-frequency : Frequency of clock in Hz
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Examples:
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qcom,qbt1000 {
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compatible = "qcom,qbt1000";
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qcom,fingerprint-sensor-spi-conn {
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clock-names = "spi_clk", "ahb_clk";
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clocks = <&clock_gcc clk_gcc_blsp1_qup5_spi_apps_clk>,
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<&clock_gcc clk_gcc_blsp1_ahb_clk>;
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clock-frequency = <15000000>;
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};
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};
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qcom,qbt1000 {
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compatible = "qcom,qbt1000";
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qcom,fingerprint-sensor-ssc-spi-conn {
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qcom,spi-port-id = <13>;
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qcom,spi-port-slave-index = <0>;
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qcom,tz-subsys-id = <1>;
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qcom,ssc-subsys-id = <5>;
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clock-frequency = <15000000>;
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};
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};
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