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Commit 415ade5f authored by Linyu Yuan's avatar Linyu Yuan
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dt-bindings: fpc: add snapshot of FPC bindings 

Support fingerprint sensor from FPC.
One change is regulator property become optional which may fixed.

Change-Id: I8dc2672ec50735a4c2bf4fdde4d0cd41a6036924
parent 0136ddaf

bindings/misc/fpc,fpc1028.txt

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Fingerprint Cards AB. Fpc1028 driver



The fpc1028 fingerprint sensor is connected to the host processor via SPI.

The sensor will generates interrupts when the user touches the sensor.

The host controller is expected to read data over SPI and pass the data to

the rest of the system.



This binding document describes the properties for this module.



Properties:



- compatible

  Usage:      required

  Value type: <string>

  Definition: It must be "fpc,fpc1020"



- interrupts

  Usage:      required

  Value type: <prop-encoded-array>

  Definition: Peripheral interrupt specifier.



- interrupt-parent

  Usage:      required

  Value type: <phandle>

  Definition: phandle of the interrupt controller which services the

  summary interrupt.



- fpc,gpio_rst

  Usage:      required

  Value type: <prop-encoded-array>

  Definition: GPIO which connecting to the reset pin of fpc1028



- fpc,gpio_irq

  Usage:      required

  Value type: <prop-encoded-array>

  Definition: Specifies the GPIO which connecting to the irq pin of fpc1028.



- vcc_spi-supply

  Usage:      optional

  Value type: <phandle>

  Definition: The phandle of the regulator which supplies fpc1028 spi bus core.



- vcc_io-supply

  Usage:      optional

  Value type: <phandle>

  Definition: The phandle of the regulator which supplies fpc1028 io pins.



- vcc_ana-supply

  Usage:      optional

  Value type: <phandle>

  Definition: The phandle of the regulator which supplies fpc1028 analog circuit.



- pinctrl-names:

  Usage:      required

  Value type: <string>

  Definition: Pinctrl state names for each pin group configuration.

  eg:"fpc1020_reset_reset", "fpc1020_reset_active", "fpc1020_irq_active".

  refer to "Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt"



- pinctrl-n:

  Usage:      required

  Value type: <string>

  Definition: pinctrl state for each pin group

  refer to "Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt"





Example:



	fpc1020 {

		compatible = "fpc,fpc1020";

		interrupt-parent = <&tlmm>;

		interrupts = <48 0>;

		fpc,gpio_rst = <&tlmm 124 0x0>;

		fpc,gpio_irq = <&tlmm 48 0>;

		vcc_spi-supply = <&pm8953_l5>;

		vdd_io-supply  = <&pm8953_l5>;

		vdd_ana-supply = <&pm8953_l5>;

		fpc,enable-on-boot;

		pinctrl-names = "fpc1020_reset_reset",

				"fpc1020_reset_active",

				"fpc1020_irq_active";

		pinctrl-0 = <&msm_gpio_124>;

		pinctrl-1 = <&msm_gpio_124_output_high>;

		pinctrl-2 = <&msm_gpio_48>;

	};

bindings/vendor-prefixes.txt

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@@ -134,6 +134,7 @@ fastrax Fastrax Oy 
fcs	Fairchild Semiconductor

firefly	Firefly

focaltech	FocalTech Systems Co.,Ltd

fpc	Fingerprint Cards AB.

friendlyarm	Guangzhou FriendlyARM Computer Tech Co., Ltd

fsl	Freescale Semiconductor

fujitsu	Fujitsu Ltd.