nfc: s3fwrn5: Add driver for Samsung S3FWRN5 NFC Chip

Add driver for Samsung S3FWRN5 NFC controller.
S3FWRN5 is using NCI protocol and I2C communication interface.

Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/net/nfc/s3fwrn5.txt b/Documentation/devicetree/bindings/net/nfc/s3fwrn5.txt
new file mode 100644
index 000000000000..fb1e75facf1b
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/nfc/s3fwrn5.txt
@@ -0,0 +1,27 @@
+* Samsung S3FWRN5 NCI NFC Controller
+
+Required properties:
+- compatible: Should be "samsung,s3fwrn5-i2c".
+- reg: address on the bus
+- interrupt-parent: phandle for the interrupt gpio controller
+- interrupts: GPIO interrupt to which the chip is connected
+- s3fwrn5,en-gpios: Output GPIO pin used for enabling/disabling the chip
+- s3fwrn5,fw-gpios: Output GPIO pin used to enter firmware mode and
+  sleep/wakeup control
+
+Example:
+
+&hsi2c_4 {
+	status = "okay";
+	s3fwrn5@27 {
+		compatible = "samsung,s3fwrn5-i2c";
+
+		reg = <0x27>;
+
+		interrupt-parent = <&gpa1>;
+		interrupts = <3 0 0>;
+
+		s3fwrn5,en-gpios = <&gpf1 4 0>;
+		s3fwrn5,fw-gpios = <&gpj0 2 0>;
+	};
+};