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6db0cd5543
This adds a new optional device tree property device-wakeup-gpios, which specifies the GPIO connected to BT_WAKE_IN pin of the NXP chipset. If this property is defined, the driver will use this GPIO for driving chip into sleep/wakeup state, else use the UART break signal by default. Signed-off-by: Neeraj Sanjay Kale <neeraj.sanjaykale@nxp.com> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
59 lines
1.6 KiB
YAML
59 lines
1.6 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/net/bluetooth/nxp,88w8987-bt.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: NXP Bluetooth chips
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description:
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This binding describes UART-attached NXP bluetooth chips. These chips
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are dual-radio chips supporting WiFi and Bluetooth. The bluetooth
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works on standard H4 protocol over 4-wire UART. The RTS and CTS lines
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are used during FW download. To enable power save mode, the host
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asserts break signal over UART-TX line to put the chip into power save
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state. De-asserting break wakes up the BT chip.
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maintainers:
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- Neeraj Sanjay Kale <neeraj.sanjaykale@nxp.com>
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properties:
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compatible:
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enum:
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- nxp,88w8987-bt
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- nxp,88w8997-bt
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fw-init-baudrate:
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$ref: /schemas/types.yaml#/definitions/uint32
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default: 115200
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description:
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Chip baudrate after FW is downloaded and initialized.
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This property depends on the module vendor's
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configuration.
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firmware-name:
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maxItems: 1
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device-wakeup-gpios:
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maxItems: 1
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description:
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Host-To-Chip power save mechanism is driven by this GPIO
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connected to BT_WAKE_IN pin of the NXP chipset.
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required:
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- compatible
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/gpio/gpio.h>
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serial {
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bluetooth {
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compatible = "nxp,88w8987-bt";
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fw-init-baudrate = <3000000>;
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firmware-name = "uartuart8987_bt_v0.bin";
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device-wakeup-gpios = <&gpio 11 GPIO_ACTIVE_HIGH>;
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};
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};
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