dt-bindings: net: bluetooth: Add NXP bluetooth support

Add binding document for NXP bluetooth chipsets attached over UART.

Signed-off-by: Neeraj Sanjay Kale <neeraj.sanjaykale@nxp.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

1 files changed, 45 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/net/bluetooth/nxp,88w8987-bt.yaml b/Documentation/devicetree/bindings/net/bluetooth/nxp,88w8987-bt.yaml
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+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/bluetooth/nxp,88w8987-bt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP Bluetooth chips
+
+description:
+  This binding describes UART-attached NXP bluetooth chips. These chips
+  are dual-radio chips supporting WiFi and Bluetooth. The bluetooth
+  works on standard H4 protocol over 4-wire UART. The RTS and CTS lines
+  are used during FW download. To enable power save mode, the host
+  asserts break signal over UART-TX line to put the chip into power save
+  state. De-asserting break wakes up the BT chip.
+
+maintainers:
+  - Neeraj Sanjay Kale <neeraj.sanjaykale@nxp.com>
+
+properties:
+  compatible:
+    enum:
+      - nxp,88w8987-bt
+      - nxp,88w8997-bt
+
+  fw-init-baudrate:
+    description:
+      Chip baudrate after FW is downloaded and initialized.
+      This property depends on the module vendor's
+      configuration. If this property is not specified,
+      115200 is set as default.
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+    serial {
+        bluetooth {
+            compatible = "nxp,88w8987-bt";
+            fw-init-baudrate = <3000000>;
+        };
+    };