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Commit ea7266aa authored Jan 23, 2019 by Tapas Dey

dt-bindings: nfc: Add Documentation for nq-nci



Add description for qcom,nq-nci.

It's snapshot from 'msm-4.14 commit 2cae74ad
("NFC: Add snapshot of NQxxx NFC driver").

Change-Id: Ic58748159119e23b8e1e929dde9dae7be24a0d8e
Signed-off-by: Tapas Dey <tdey@codeaurora.org>

parent b6c1e1af

Documentation/devicetree/bindings/nfc/nq-nci.txt

0 → 100644

+49 −0

Original line number	Diff line number	Diff line
		Qualcomm Technologies, Inc NQxxxx NFC NCI device

		Near Field Communication (NFC) device is based on NFC Controller Interface (NCI)

		Required properties:

		- compatible: "qcom,nq-nci"
		- reg: NCI i2c slave address.
		- qcom,nq-ven: specific gpio for hardware reset.
		- qcom,nq-irq: specific gpio for read interrupt.
		- qcom,nq-firm: gpio for firmware download
		- qcom,nq-clkreq: gpio for clock
		- interrupt-parent: Should be phandle for the interrupt controller
		that services interrupts for this device.
		- interrupts: Nfc read interrupt,gpio-clk-req interrupt


		Recommended properties:

		- interrupt-names: names of interrupts, should include "nfc_irq", used for reference


		Optional properties:

		- pinctrl-names, pinctrl-0, pincntrl-1: references to our pincntrl settings
		- clocks, clock-names: must contain the NQxxxx's core clock.
		- qcom,nq-esepwr: gpio to control power of secure element
		- qcom,clk-src: NFC clock for antenna

		Example:

		nq-nci@2b {
		compatible = "qcom,nq-nci";
		reg = <0x2b>;
		qcom,nq-irq = <&tlmm 29 0x00>;
		qcom,nq-ven = <&tlmm 30 0x00>;
		qcom,nq-firm = <&tlmm 93 0x00>;
		qcom,nq-clkreq = <&pm8998_gpios 21 0x00>;
		qcom,nq-esepwr = <&tlmm 116 0x00>;
		qcom,clk-src = "BBCLK2";
		interrupt-parent = <&tlmm>;
		interrupts = <29 0>;
		interrupt-names = "nfc_irq";
		pinctrl-names = "nfc_active","nfc_suspend";
		pinctrl-0 = <&nfc_int_active &nfc_disable_active>;
		pinctrl-1 = <&nfc_int_suspend &nfc_disable_suspend>;
		clocks = <&clock_rpm clk_bb_clk2_pin>;
		clock-names = "ref_clk";
		};