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authorClément Perrochaud <clement.perrochaud@nxp.com>2015-03-09 11:12:05 +0100
committerSamuel Ortiz <sameo@linux.intel.com>2015-03-26 11:21:41 +0100
commit6be88670fc59d50426f90f734a36b90e1de7d148 (patch)
tree8296eaff5b2747937b4239fcee58f5fa380926dc /Documentation/devicetree/bindings/net
parentdece45855a8b0d1dcf48eb01d0822070ded6a4c8 (diff)
downloadkernel-6be88670fc59d50426f90f734a36b90e1de7d148.tar.gz
NFC: nxp-nci_i2c: Add I2C support to NXP NCI driver
Add a module to the NXP-NCI driver to support NFC controllers with an I2C control interface, such as the NPC100. Signed-off-by: Clément Perrochaud <clement.perrochaud@effinnov.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'Documentation/devicetree/bindings/net')
-rw-r--r--Documentation/devicetree/bindings/net/nfc/nxp-nci.txt35
1 files changed, 35 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/net/nfc/nxp-nci.txt b/Documentation/devicetree/bindings/net/nfc/nxp-nci.txt
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index 000000000000..5b6cd9b3f628
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+++ b/Documentation/devicetree/bindings/net/nfc/nxp-nci.txt
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+* NXP Semiconductors NXP NCI NFC Controllers
+
+Required properties:
+- compatible: Should be "nxp,nxp-nci-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 chip
+- 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 NPC100 NFC controller on I2C2):
+
+&i2c2 {
+
+ status = "okay";
+
+ npc100: npc100@29 {
+
+ compatible = "nxp,nxp-nci-i2c";
+
+ reg = <0x29>;
+ clock-frequency = <100000>;
+
+ interrupt-parent = <&gpio1>;
+ interrupts = <29 GPIO_ACTIVE_HIGH>;
+
+ enable-gpios = <&gpio0 30 GPIO_ACTIVE_HIGH>;
+ firmware-gpios = <&gpio0 31 GPIO_ACTIVE_HIGH>;
+ };
+};