From cca70a9aeb80e02791f8d0b664235a74cabf0623 Mon Sep 17 00:00:00 2001
From: Karthik Poosa <kpoosa@qti.qualcomm.com>
Date: Mon, 9 Dec 2019 15:30:24 +0530
Subject: [PATCH] dt-bindings: nfc: Add Documentation for I2C NFC devicetree
 node

Add description for NFC I2C devicetree node.

It is derived from 'msm-4.19 commit ea7266aa5447
("Add Documentation for nq-nci").

Change-Id: I27b01976fde2896b82112e678ece891fe0e89615
---
 bindings/nfc/sn-nci.txt | 50 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 bindings/nfc/sn-nci.txt

diff --git a/bindings/nfc/sn-nci.txt b/bindings/nfc/sn-nci.txt
new file mode 100644
index 000000000000..257f592530d6
--- /dev/null
+++ b/bindings/nfc/sn-nci.txt
@@ -0,0 +1,50 @@
+Qualcomm Technologies, Inc SNxxx NFC NCI device
+
+Near Field Communication (NFC) device is based on NFC Controller Interface (NCI)
+
+Required properties:
+
+- compatible: "qcom,sn-nci"
+- reg: NCI I2C slave address.
+- qcom,sn-ven: specific gpio for hardware reset.
+- qcom,sn-irq: specific gpio for read interrupt.
+- qcom,sn-firm: gpio for firmware download
+- qcom,sn-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 SNxxx's core clock.
+- qcom,clk-src: NFC clock for antenna
+
+Example:
+
+	sn-nci@2b {
+		compatible = "qcom,sn-nci";
+		reg = <0x2b>;
+		qcom,sn-irq = <&tlmm 87 0x00>;
+		qcom,sn-ven = <&tlmm 62 0x00>;
+		qcom,sn-firm = <&tlmm 86 0x00>;
+		qcom,sn-clkreq = <&tlmm 63 0x00>;
+		qcom,clk-src = "BBCLK2";
+		interrupt-parent = <&tlmm>;
+		interrupts = <29 0>;
+		interrupt-names = "nfc_irq";
+		pinctrl-names = "default","sleep";
+		pinctrl-0 = <&nfc_enable_active &nfc_fwdl_active
+				&nfc_clk_req_active &nfc_int_active>;
+		pinctrl-1 = <&nfc_enable_suspend &nfc_fwdl_suspend
+				&nfc_clk_req_suspend &nfc_int_suspend>;
+		clocks = <&clock_rpm clk_bb_clk2_pin>;
+		clock-names = "ref_clk";
+		status = "ok";
+	};