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Subject[PATCH v5 2/7] nfc: pn532_uart: Add NXP PN532 to devicetree docs
Date
Add a simple binding doc for the pn532.

Cc: Johan Hovold <johan@kernel.org>
Signed-off-by: Lars Poeschel <poeschel@lemonage.de>
---
Changes in v4:
- Add documentation about reg property in case of i2c

Changes in v3:
- seperate binding doc instead of entry in trivial-devices.txt

.../devicetree/bindings/nfc/pn532.txt | 33 +++++++++++++++++++
1 file changed, 33 insertions(+)
create mode 100644 Documentation/devicetree/bindings/nfc/pn532.txt

diff --git a/Documentation/devicetree/bindings/nfc/pn532.txt b/Documentation/devicetree/bindings/nfc/pn532.txt
new file mode 100644
index 000000000000..d5aaa588073d
--- /dev/null
+++ b/Documentation/devicetree/bindings/nfc/pn532.txt
@@ -0,0 +1,33 @@
+NXP PN532 NFC Chip
+
+Required properties:
+- compatible: Should be
+ - "nxp,pn532" Place a node with this inside the devicetree node of the bus
+ where the NFC chip is connected to.
+ Currently the kernel has phy bindings for uart and i2c.
+ - "nxp,pn532-i2c" (DEPRECATED) only works for the i2c binding.
+ - "nxp,pn533-i2c" (DEPRECATED) only works for the i2c binding.
+
+Required properties if connected on i2c:
+- reg: for the i2c bus address. This is fixed at 0x48 for the PN532.
+
+Example uart:
+
+uart4: serial@49042000 {
+ compatible = "ti,omap3-uart";
+
+ pn532: nfc {
+ compatible = "nxp,pn532";
+ };
+};
+
+Example i2c:
+
+i2c1: i2c@0 {
+ compatible = "ti,omap3-i2c";
+
+ pn532: nfc {
+ compatible = "nxp,pn532";
+ reg = <0x48>;
+ };
+};
--
2.20.1
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