These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / net / nfc / st-nci-spi.txt

diff --git a/kernel/Documentation/devicetree/bindings/net/nfc/st-nci-spi.txt b/kernel/Documentation/devicetree/bindings/net/nfc/st-nci-spi.txt
new file mode 100644 (file)
index 0000000..711ca85
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/net/nfc/st-nci-spi.txt
@@ -0,0 +1,38 @@
+* STMicroelectronics SAS. ST NCI NFC Controller
+
+Required properties:
+- compatible: Should be "st,st21nfcb-spi"
+- spi-max-frequency: Maximum SPI frequency (<= 4000000).
+- interrupt-parent: phandle for the interrupt gpio controller
+- interrupts: GPIO interrupt to which the chip is connected
+- reset-gpios: Output GPIO pin used to reset the ST21NFCB
+
+Optional SoC Specific Properties:
+- pinctrl-names: Contains only one value - "default".
+- pintctrl-0: Specifies the pin control groups used for this controller.
+- ese-present: Specifies that an ese is physically connected to the nfc
+controller.
+- uicc-present: Specifies that the uicc swp signal can be physically
+connected to the nfc controller.
+
+Example (for ARM-based BeagleBoard xM with ST21NFCB on SPI4):
+
+&mcspi4 {
+
+       status = "okay";
+
+       st21nfcb: st21nfcb@0 {
+
+               compatible = "st,st21nfcb-spi";
+
+               clock-frequency = <4000000>;
+
+               interrupt-parent = <&gpio5>;
+               interrupts = <2 IRQ_TYPE_EDGE_RISING>;
+
+               reset-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>;
+
+               ese-present;
+               uicc-present;
+       };
+};