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Commit c4538423 authored by Ian Maund's avatar Ian Maund
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ARM: dts: msm: SSC SPI device for fingerprint sensor for MSM8996 



Fingerprint sensor is connected to SSC SPI for ultrasonic wakeup
feature. Add SSC SPI device to facilitate enablement.

Change-Id: I2078f148e34b9e4b8ec7fbf0fb9b3f2e89893fac
Acked-by: default avatarTamoghna Sadhu <tsadhu@qti.qualcomm.com>
Signed-off-by: default avatarIan Maund <imaund@codeaurora.org>
parent b92cb423

Documentation/devicetree/bindings/qbt1000/qbt1000.txt

+48 −13
Original line number Diff line number Diff line 
* QBT1000 (Qualcomm Technologies Inc Ultra-Sonic Fingerprint Sensor)



1) Main node



   Required properties:

   - compatible : Should be "qcom,qbt1000"



2) Child nodes



   The main node must have one of the two possible child nodes which describes the

   properties of sensor connection.



   a) Sensor connected to SPI port :

   Node name - qcom,fingerprint-sensor-spi-conn



   Required properties:

   - clock-names : List of clock names that need to be voted on/off

   - clocks : Property pair that represents the clock controller and the clock

              id. This in combimination with the clock-name is used to obtain

              the handle for the clock that needs to be voted on/off

   - clock-frequency : Frequency of clock in Hz



Example:

   b) Sensor connected to SSC SPI port :

   Node name - qcom,fingerprint-sensor-ssc-spi-conn



   Required properties:

   - qcom,spi-port-id : SPI port id sensor is connected to

   - qcom,spi-port-slave-index : SPI port slave index

   - qcom,tz-subsys-id : TZ subsystem-id for SCM calls

   - qcom,ssc-subsys-id : SSC subsystem-id for SCM calls

   - clock-frequency : Frequency of clock in Hz



Examples:

        qcom,qbt1000 {

                compatible = "qcom,qbt1000";

                qcom,fingerprint-sensor-spi-conn {

                        clock-names = "spi_clk", "ahb_clk";

                        clocks = <&clock_gcc clk_gcc_blsp1_qup5_spi_apps_clk>,

                        <&clock_gcc clk_gcc_blsp1_ahb_clk>;

                        clock-frequency = <15000000>;

                };

        };



        qcom,qbt1000 {

                compatible = "qcom,qbt1000";

                qcom,fingerprint-sensor-ssc-spi-conn {

                        qcom,spi-port-id = <13>;

                        qcom,spi-port-slave-index = <0>;

                        qcom,tz-subsys-id = <1>;

                        qcom,ssc-subsys-id = <5>;

                        clock-frequency = <15000000>;

                };

        };

arch/arm/boot/dts/qcom/msm8996.dtsi

+7 −4
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@@ -2365,11 +2365,14 @@ 


	qcom,qbt1000 {

		compatible = "qcom,qbt1000";

		clock-names = "spi_clk", "ahb_clk";

		clocks = <&clock_gcc clk_gcc_blsp1_qup5_spi_apps_clk>,

			 <&clock_gcc clk_gcc_blsp1_ahb_clk>;

		qcom,fingerprint-sensor-ssc-spi-conn {

			qcom,spi-port-id = <2>;

			qcom,spi-port-slave-index = <0>;

			qcom,tz-subsys-id = <1>;

			qcom,ssc-subsys-id = <5>;

			clock-frequency = <15000000>;

		};

	};



	qcom,sensor-information {

		compatible = "qcom,sensor-information";