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Commit a1a8b459 authored by Clement Perrochaud's avatar Clement Perrochaud Committed by Samuel Ortiz
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NFC: pn544: i2c: Add DTS Documentation 



Describe the properties used by the PN544 NFC controller driver.

Signed-off-by: default avatarClément Perrochaud <clement.perrochaud@nxp.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent eda8565a

Documentation/devicetree/bindings/net/nfc/pn544.txt

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* NXP Semiconductors PN544 NFC Controller



Required properties:

- compatible: Should be "nxp,pn544-i2c".

- clock-frequency: IC work frequency.

- reg: address on the bus

- interrupt-parent: phandle for the interrupt gpio controller

- interrupts: GPIO interrupt to which the chip is connected

- enable-gpios: Output GPIO pin used for enabling/disabling the PN544

- firmware-gpios: Output GPIO pin used to enter firmware download mode



Optional SoC Specific Properties:

- pinctrl-names: Contains only one value - "default".

- pintctrl-0: Specifies the pin control groups used for this controller.



Example (for ARM-based BeagleBone with PN544 on I2C2):



&i2c2 {



	status = "okay";



	pn544: pn544@28 {



		compatible = "nxp,pn544-i2c";



		reg = <0x28>;

		clock-frequency = <400000>;



		interrupt-parent = <&gpio1>;

		interrupts = <17 GPIO_ACTIVE_HIGH>;



		enable-gpios = <&gpio3 21 GPIO_ACTIVE_HIGH>;

		firmware-gpios = <&gpio3 19 GPIO_ACTIVE_HIGH>;

	};

};