Bluetooth: btbcm: Rewrite bindings in YAML and add reset
This rewrites the Broadcom bluetooth bindings in YAML and adds a GPIO handle for the BT_RST_N line as used on some platforms. The Ingenic UART binding was using this binding in its example DTS fragment, however mistakenly using "vcc-supply" for what is called "vbat-supply". The proper DTS files and the code in the kernel all use "vbat-supply" so fix up the example in this patch so we ge a clean check. Cc: devicetree@vger.kernel.org Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
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Linus Walleij
Marcel Holtmann
parent
ff02db13e9
commit
7820ee1c47
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@ -1,56 +0,0 @@
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Broadcom Bluetooth Chips
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---------------------
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This documents the binding structure and common properties for serial
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attached Broadcom devices.
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Serial attached Broadcom devices shall be a child node of the host UART
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device the slave device is attached to.
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Required properties:
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- compatible: should contain one of the following:
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* "brcm,bcm20702a1"
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* "brcm,bcm4329-bt"
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* "brcm,bcm4330-bt"
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* "brcm,bcm43438-bt"
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* "brcm,bcm4345c5"
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* "brcm,bcm43540-bt"
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* "brcm,bcm4335a0"
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Optional properties:
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- max-speed: see Documentation/devicetree/bindings/serial/serial.yaml
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- shutdown-gpios: GPIO specifier, used to enable the BT module
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- device-wakeup-gpios: GPIO specifier, used to wakeup the controller
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- host-wakeup-gpios: GPIO specifier, used to wakeup the host processor.
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deprecated, replaced by interrupts and
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"host-wakeup" interrupt-names
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- clocks: 1 or 2 clocks as defined in clock-names below, in that order
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- clock-names: names for clock inputs, matching the clocks given
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- "extclk": deprecated, replaced by "txco"
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- "txco": external reference clock (not a standalone crystal)
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- "lpo": external low power 32.768 kHz clock
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- vbat-supply: phandle to regulator supply for VBAT
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- vddio-supply: phandle to regulator supply for VDDIO
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- brcm,bt-pcm-int-params: configure PCM parameters via a 5-byte array
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- sco-routing: 0 = PCM, 1 = Transport, 2 = Codec, 3 = I2S
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- pcm-interface-rate: 128KBps, 256KBps, 512KBps, 1024KBps, 2048KBps
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- pcm-frame-type: short, long
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- pcm-sync-mode: slave, master
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- pcm-clock-mode: slave, master
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- interrupts: must be one, used to wakeup the host processor
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- interrupt-names: must be "host-wakeup"
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Example:
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&uart2 {
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pinctrl-names = "default";
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pinctrl-0 = <&uart2_pins>;
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bluetooth {
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compatible = "brcm,bcm43438-bt";
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max-speed = <921600>;
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brcm,bt-pcm-int-params = [01 02 00 01 01];
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};
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};
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@ -0,0 +1,117 @@
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# 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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$id: http://devicetree.org/schemas/net/broadcom-bluetooth.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Broadcom Bluetooth Chips
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maintainers:
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- Linus Walleij <linus.walleij@linaro.org>
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description:
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This binding describes Broadcom UART-attached bluetooth chips.
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properties:
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compatible:
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enum:
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- brcm,bcm20702a1
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- brcm,bcm4329-bt
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- brcm,bcm4330-bt
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- brcm,bcm43438-bt
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- brcm,bcm4345c5
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- brcm,bcm43540-bt
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- brcm,bcm4335a0
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shutdown-gpios:
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maxItems: 1
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description: GPIO specifier for the line BT_REG_ON used to
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power on the BT module
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reset-gpios:
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maxItems: 1
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description: GPIO specifier for the line BT_RST_N used to
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reset the BT module. This should be marked as
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GPIO_ACTIVE_LOW.
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device-wakeup-gpios:
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maxItems: 1
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description: GPIO specifier for the line BT_WAKE used to
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wakeup the controller. This is using the BT_GPIO_0
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pin on the chip when in use.
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host-wakeup-gpios:
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maxItems: 1
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deprecated: true
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description: GPIO specifier for the line HOST_WAKE used
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to wakeup the host processor. This is using he BT_GPIO_1
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pin on the chip when in use. This is deprecated and replaced
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by interrupts and "host-wakeup" interrupt-names
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clocks:
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maxItems: 2
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description: 1 or 2 clocks as defined in clock-names below,
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in that order
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clock-names:
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description: Names of the 1 to 2 supplied clocks
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items:
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- const: txco
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- const: lpo
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- const: extclk
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vbat-supply:
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description: phandle to regulator supply for VBAT
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vddio-supply:
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description: phandle to regulator supply for VDDIO
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brcm,bt-pcm-int-params:
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$ref: /schemas/types.yaml#/definitions/uint8-array
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minItems: 5
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maxItems: 5
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description: |-
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configure PCM parameters via a 5-byte array:
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sco-routing: 0 = PCM, 1 = Transport, 2 = Codec, 3 = I2S
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pcm-interface-rate: 128KBps, 256KBps, 512KBps, 1024KBps, 2048KBps
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pcm-frame-type: short, long
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pcm-sync-mode: slave, master
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pcm-clock-mode: slave, master
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interrupts:
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items:
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- description: Handle to the line HOST_WAKE used to wake
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up the host processor. This uses the BT_GPIO_1 pin on
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the chip when in use.
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interrupt-names:
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items:
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- const: host-wakeup
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max-speed: true
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current-speed: true
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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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#include <dt-bindings/interrupt-controller/irq.h>
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uart {
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uart-has-rtscts;
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bluetooth {
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compatible = "brcm,bcm4330-bt";
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max-speed = <921600>;
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brcm,bt-pcm-int-params = [01 02 00 01 01];
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shutdown-gpios = <&gpio 30 GPIO_ACTIVE_HIGH>;
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device-wakeup-gpios = <&gpio 7 GPIO_ACTIVE_HIGH>;
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reset-gpios = <&gpio 9 GPIO_ACTIVE_LOW>;
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interrupt-parent = <&gpio>;
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interrupts = <8 IRQ_TYPE_EDGE_FALLING>;
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};
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};
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@ -91,7 +91,7 @@ examples:
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bluetooth {
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compatible = "brcm,bcm4330-bt";
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reset-gpios = <&gpf 8 GPIO_ACTIVE_HIGH>;
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vcc-supply = <&wlan0_power>;
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vbat-supply = <&wlan0_power>;
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device-wakeup-gpios = <&gpf 5 GPIO_ACTIVE_HIGH>;
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host-wakeup-gpios = <&gpf 6 GPIO_ACTIVE_HIGH>;
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shutdown-gpios = <&gpf 4 GPIO_ACTIVE_LOW>;
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