From 36d076201bd467d6bd22ba14e56e457d55e32be7 Mon Sep 17 00:00:00 2001
From: Bongsu Jeon <bongsu.jeon@samsung.com>
Date: Wed, 2 Dec 2020 20:47:38 +0900
Subject: [PATCH] dt-bindings: net: nfc: s3fwrn5: Support a UART interface

Since S3FWRN82 NFC Chip, The UART interface can be used.
S3FWRN82 supports I2C and UART interface.

Signed-off-by: Bongsu Jeon <bongsu.jeon@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 .../bindings/net/nfc/samsung,s3fwrn5.yaml     | 31 +++++++++++++++++--
 1 file changed, 28 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/nfc/samsung,s3fwrn5.yaml b/Documentation/devicetree/bindings/net/nfc/samsung,s3fwrn5.yaml
index cb0b8a560282..ca3904bf90e0 100644
--- a/Documentation/devicetree/bindings/net/nfc/samsung,s3fwrn5.yaml
+++ b/Documentation/devicetree/bindings/net/nfc/samsung,s3fwrn5.yaml
@@ -12,7 +12,9 @@ maintainers:
 
 properties:
   compatible:
-    const: samsung,s3fwrn5-i2c
+    enum:
+      - samsung,s3fwrn5-i2c
+      - samsung,s3fwrn82
 
   en-gpios:
     maxItems: 1
@@ -47,10 +49,19 @@ additionalProperties: false
 required:
   - compatible
   - en-gpios
-  - interrupts
-  - reg
   - wake-gpios
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: samsung,s3fwrn5-i2c
+    then:
+      required:
+        - interrupts
+        - reg
+
 examples:
   - |
     #include <dt-bindings/gpio/gpio.h>
@@ -71,3 +82,17 @@ examples:
             wake-gpios = <&gpj0 2 GPIO_ACTIVE_HIGH>;
         };
     };
+  # UART example on Raspberry Pi
+  - |
+    uart0 {
+        status = "okay";
+
+        nfc {
+            compatible = "samsung,s3fwrn82";
+
+            en-gpios = <&gpio 20 GPIO_ACTIVE_HIGH>;
+            wake-gpios = <&gpio 16 GPIO_ACTIVE_HIGH>;
+
+            status = "okay";
+        };
+    };