88ffadce9d
The original binding was mentioning that valid values for the clocks and clock-names property were one or two clocks from extclk, txco and lpo, with extclk being deprecated in favor of txco. However, the current binding lists a valid array as extclk, txco and lpo, with either one or two items. While this looks similar, it actually enforces that all the device trees use either ["extclk"], or ["extclk", "txco"]. That doesn't make much sense, since the two clocks are said to be equivalent, with one superseeding the other. lpo is also not a valid clock anymore, and would be as the third clock of the list, while we could have only this clock in the previous binding (and in DTs). Let's rework the clock clause to allow to have either: - extclk, and mark it a deprecated - txco alone - lpo alone - txco, lpo While ["extclk", "lpo"] wouldn't be valid, it wasn't found in any device tree so it's not an issue in practice. Similarly, ["lpo", "txco"] is still considered invalid, but it's generally considered as a best practice to fix the order of clocks. Cc: "David S. Miller" <davem@davemloft.net> Cc: Jakub Kicinski <kuba@kernel.org> Cc: netdev@vger.kernel.org Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Maxime Ripard <maxime@cerno.tech> Signed-off-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20210924072756.869731-1-maxime@cerno.tech
131 lines
3.4 KiB
YAML
131 lines
3.4 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
|
|
%YAML 1.2
|
|
---
|
|
$id: http://devicetree.org/schemas/net/broadcom-bluetooth.yaml#
|
|
$schema: http://devicetree.org/meta-schemas/core.yaml#
|
|
|
|
title: Broadcom Bluetooth Chips
|
|
|
|
maintainers:
|
|
- Linus Walleij <linus.walleij@linaro.org>
|
|
|
|
description:
|
|
This binding describes Broadcom UART-attached bluetooth chips.
|
|
|
|
properties:
|
|
compatible:
|
|
enum:
|
|
- brcm,bcm20702a1
|
|
- brcm,bcm4329-bt
|
|
- brcm,bcm4330-bt
|
|
- brcm,bcm4334-bt
|
|
- brcm,bcm43438-bt
|
|
- brcm,bcm4345c5
|
|
- brcm,bcm43540-bt
|
|
- brcm,bcm4335a0
|
|
|
|
shutdown-gpios:
|
|
maxItems: 1
|
|
description: GPIO specifier for the line BT_REG_ON used to
|
|
power on the BT module
|
|
|
|
reset-gpios:
|
|
maxItems: 1
|
|
description: GPIO specifier for the line BT_RST_N used to
|
|
reset the BT module. This should be marked as
|
|
GPIO_ACTIVE_LOW.
|
|
|
|
device-wakeup-gpios:
|
|
maxItems: 1
|
|
description: GPIO specifier for the line BT_WAKE used to
|
|
wakeup the controller. This is using the BT_GPIO_0
|
|
pin on the chip when in use.
|
|
|
|
host-wakeup-gpios:
|
|
maxItems: 1
|
|
deprecated: true
|
|
description: GPIO specifier for the line HOST_WAKE used
|
|
to wakeup the host processor. This is using he BT_GPIO_1
|
|
pin on the chip when in use. This is deprecated and replaced
|
|
by interrupts and "host-wakeup" interrupt-names
|
|
|
|
clocks:
|
|
minItems: 1
|
|
maxItems: 2
|
|
description: 1 or 2 clocks as defined in clock-names below,
|
|
in that order
|
|
|
|
clock-names:
|
|
description: Names of the 1 to 2 supplied clocks
|
|
oneOf:
|
|
- const: extclk
|
|
deprecated: true
|
|
description: Deprecated in favor of txco
|
|
|
|
- const: txco
|
|
description: >
|
|
external reference clock (not a standalone crystal)
|
|
|
|
- const: lpo
|
|
description: >
|
|
external low power 32.768 kHz clock
|
|
|
|
- items:
|
|
- const: txco
|
|
- const: lpo
|
|
|
|
vbat-supply:
|
|
description: phandle to regulator supply for VBAT
|
|
|
|
vddio-supply:
|
|
description: phandle to regulator supply for VDDIO
|
|
|
|
brcm,bt-pcm-int-params:
|
|
$ref: /schemas/types.yaml#/definitions/uint8-array
|
|
minItems: 5
|
|
maxItems: 5
|
|
description: |-
|
|
configure PCM parameters via a 5-byte array:
|
|
sco-routing: 0 = PCM, 1 = Transport, 2 = Codec, 3 = I2S
|
|
pcm-interface-rate: 128KBps, 256KBps, 512KBps, 1024KBps, 2048KBps
|
|
pcm-frame-type: short, long
|
|
pcm-sync-mode: slave, master
|
|
pcm-clock-mode: slave, master
|
|
|
|
interrupts:
|
|
items:
|
|
- description: Handle to the line HOST_WAKE used to wake
|
|
up the host processor. This uses the BT_GPIO_1 pin on
|
|
the chip when in use.
|
|
|
|
interrupt-names:
|
|
items:
|
|
- const: host-wakeup
|
|
|
|
max-speed: true
|
|
current-speed: true
|
|
|
|
required:
|
|
- compatible
|
|
|
|
additionalProperties: false
|
|
|
|
examples:
|
|
- |
|
|
#include <dt-bindings/gpio/gpio.h>
|
|
#include <dt-bindings/interrupt-controller/irq.h>
|
|
|
|
uart {
|
|
uart-has-rtscts;
|
|
|
|
bluetooth {
|
|
compatible = "brcm,bcm4330-bt";
|
|
max-speed = <921600>;
|
|
brcm,bt-pcm-int-params = [01 02 00 01 01];
|
|
shutdown-gpios = <&gpio 30 GPIO_ACTIVE_HIGH>;
|
|
device-wakeup-gpios = <&gpio 7 GPIO_ACTIVE_HIGH>;
|
|
reset-gpios = <&gpio 9 GPIO_ACTIVE_LOW>;
|
|
interrupt-parent = <&gpio>;
|
|
interrupts = <8 IRQ_TYPE_EDGE_FALLING>;
|
|
};
|
|
};
|