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# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/usb/smsc,usb3503.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: SMSC USB3503 High-Speed Hub Controller
maintainers:
- Dongjin Kim <tobetter@gmail.com>
properties:
compatible:
enum:
- smsc,usb3503
- smsc,usb3503a
- smsc,usb3803
reg:
maxItems: 1
connect-gpios:
maxItems: 1
description: >
GPIO for connect
intn-gpios:
maxItems: 1
description: >
GPIO for interrupt
reset-gpios:
maxItems: 1
description: >
GPIO for reset
bypass-gpios:
maxItems: 1
description: >
GPIO for bypass.
Control signal to select between HUB MODE and BYPASS MODE.
disabled-ports:
$ref: /schemas/types.yaml#/definitions/uint32-array
minItems: 1
maxItems: 3
items:
minimum: 1
maximum: 3
description: >
Specifies the ports unused using their port number. Do not describe this
property if all ports have to be enabled.
initial-mode:
$ref: /schemas/types.yaml#/definitions/uint32
description: >
Specifies initial mode. 1 for Hub mode, 2 for standby mode and 3 for bypass mode.
In bypass mode the downstream port 3 is connected to the upstream port with low
switch resistance R_on.
clocks:
maxItems: 1
description: >
Clock used for driving REFCLK signal. If not provided the driver assumes
that clock signal is always available, its rate is specified by REF_SEL
pins and a value from the primary reference clock frequencies table is
used.
clock-names:
const: refclk
refclk-frequency:
$ref: /schemas/types.yaml#/definitions/uint32
description: >
Frequency of the REFCLK signal as defined by REF_SEL pins. If not
provided, driver will not set rate of the REFCLK signal and assume that a
value from the primary reference clock frequencies table is used.
required:
- compatible
allOf:
- if:
not:
properties:
compatible:
enum:
- smsc,usb3803
then:
properties:
bypass-gpios: false
- if:
required:
- bypass-gpios
then:
properties:
initial-mode:
enum: [1, 2, 3]
else:
properties:
initial-mode:
enum: [1, 2]
additionalProperties: false
examples:
- |
i2c {
#address-cells = <1>;
#size-cells = <0>;
usb-hub@8 {
compatible = "smsc,usb3503";
reg = <0x08>;
connect-gpios = <&gpx3 0 1>;
disabled-ports = <2 3>;
intn-gpios = <&gpx3 4 1>;
reset-gpios = <&gpx3 5 1>;
initial-mode = <1>;
clocks = <&clks 80>;
clock-names = "refclk";
};
};
- |
i2c {
#address-cells = <1>;
#size-cells = <0>;
usb-hub@8 {
compatible = "smsc,usb3803";
reg = <0x08>;
connect-gpios = <&gpx3 0 1>;
disabled-ports = <2 3>;
intn-gpios = <&gpx3 4 1>;
reset-gpios = <&gpx3 5 1>;
bypass-gpios = <&gpx3 6 1>;
initial-mode = <3>;
clocks = <&clks 80>;
clock-names = "refclk";
};
};
- |
#include <dt-bindings/gpio/gpio.h>
usb-hub {
/* I2C is not connected */
compatible = "smsc,usb3503";
initial-mode = <1>; /* initialize in HUB mode */
disabled-ports = <1>;
intn-gpios = <&pio 7 5 GPIO_ACTIVE_HIGH>; /* PH5 */
reset-gpios = <&pio 4 16 GPIO_ACTIVE_LOW>; /* PE16 */
connect-gpios = <&pio 4 17 GPIO_ACTIVE_HIGH>; /* PE17 */
refclk-frequency = <19200000>;
};
...
|
