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18afbdcd12
Add support for chip power supply and chip reset/powerdown. Signed-off-by: Catalin Popescu <catalin.popescu@leica-geosystems.com> Acked-by: Conor Dooley <conor.dooley@microchip.com> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
110 lines
2.9 KiB
YAML
110 lines
2.9 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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allOf:
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- $ref: bluetooth-controller.yaml#
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properties:
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compatible:
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enum:
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- nxp,88w8987-bt
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- nxp,88w8997-bt
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fw-init-baudrate:
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$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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max-speed:
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$ref: /schemas/types.yaml#/definitions/uint32
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enum:
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- 3000000
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- 4000000
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default: 3000000
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firmware-name:
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maxItems: 1
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device-wakeup-gpios:
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maxItems: 1
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description:
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Host-To-Chip power save mechanism is driven by this GPIO
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connected to BT_WAKE_IN pin of the NXP chipset.
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nxp,wakein-pin:
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$ref: /schemas/types.yaml#/definitions/uint8
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description:
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The GPIO number of the NXP chipset used for BT_WAKE_IN.
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interrupts:
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maxItems: 1
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description:
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Host wakeup by falling edge interrupt on this pin which is
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connected to BT_WAKE_OUT pin of the NXP chipset.
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interrupt-names:
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items:
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- const: wakeup
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wakeup-source: true
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nxp,wakeout-pin:
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$ref: /schemas/types.yaml#/definitions/uint8
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description:
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The GPIO number of the NXP chipset used for BT_WAKE_OUT.
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vcc-supply:
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description:
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phandle of the regulator that provides the supply voltage.
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reset-gpios:
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description:
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Chip powerdown/reset signal (PDn).
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required:
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- compatible
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/interrupt-controller/irq.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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max-speed = <4000000>;
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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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nxp,wakein-pin = /bits/ 8 <18>;
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nxp,wakeout-pin = /bits/ 8 <19>;
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vcc-supply = <&nxp_iw612_supply>;
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reset-gpios = <&gpioctrl 2 GPIO_ACTIVE_LOW>;
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local-bd-address = [66 55 44 33 22 11];
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interrupt-parent = <&gpio>;
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interrupts = <8 IRQ_TYPE_EDGE_FALLING>;
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interrupt-names = "wakeup";
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wakeup-source;
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};
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};
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