Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 38 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/net/nfc/st-nci-i2c.txt b/Documentation/devicetree/bindings/net/nfc/st-nci-i2c.txt
new file mode 100644
index 000000000..baa8f8133
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/nfc/st-nci-i2c.txt
@@ -0,0 +1,38 @@
+* STMicroelectronics SAS. ST NCI NFC Controller
+
+Required properties:
+- compatible: Should be "st,st21nfcb-i2c" or "st,st21nfcc-i2c".
+- clock-frequency: I²C work frequency.
+- reg: address on the bus
+- 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 I2C2):
+
+&i2c2 {
+
+
+	st21nfcb: st21nfcb@8 {
+
+		compatible = "st,st21nfcb-i2c";
+
+		reg = <0x08>;
+		clock-frequency = <400000>;
+
+		interrupt-parent = <&gpio5>;
+		interrupts = <2 IRQ_TYPE_LEVEL_HIGH>;
+
+		reset-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>;
+
+		ese-present;
+		uicc-present;
+	};
+};