From a1a8b4594f8d30e650dad19832e17552219e5694 Mon Sep 17 00:00:00 2001 From: Clement Perrochaud Date: Wed, 2 Apr 2014 09:03:27 +0000 Subject: [PATCH] NFC: pn544: i2c: Add DTS Documentation MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Describe the properties used by the PN544 NFC controller driver. Signed-off-by: Clément Perrochaud Signed-off-by: Samuel Ortiz --- .../devicetree/bindings/net/nfc/pn544.txt | 35 +++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/nfc/pn544.txt diff --git a/Documentation/devicetree/bindings/net/nfc/pn544.txt b/Documentation/devicetree/bindings/net/nfc/pn544.txt new file mode 100644 index 000000000000..dab69f36167c --- /dev/null +++ b/Documentation/devicetree/bindings/net/nfc/pn544.txt @@ -0,0 +1,35 @@ +* NXP Semiconductors PN544 NFC Controller + +Required properties: +- compatible: Should be "nxp,pn544-i2c". +- clock-frequency: I²C 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>; + }; +}; -- 2.20.1