1

dt-bindings: usb: smsc,usb3503: Add usb3803

Add support for usb3803, compared to usb3503 it uses a regular USB
connection to upstream instead of HSIC, it has an additional
low power mode (bypass) and an additional control signal (BYPASS_N).

In bypass mode the downstream port 3 is connected to the upstream port
with low switch resistance R_on.

Signed-off-by: Emanuele Ghidoli <emanuele.ghidoli@toradex.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230313165039.255579-2-francesco@dolcini.it
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Emanuele Ghidoli 2023-03-13 17:50:37 +01:00 committed by Greg Kroah-Hartman
parent 3442755774
commit 1239e81247

View File

@ -14,6 +14,7 @@ properties:
enum:
- smsc,usb3503
- smsc,usb3503a
- smsc,usb3803
reg:
maxItems: 1
@ -33,6 +34,12 @@ properties:
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
@ -46,9 +53,10 @@ properties:
initial-mode:
$ref: /schemas/types.yaml#/definitions/uint32
enum: [1, 2]
description: >
Specifies initial mode. 1 for Hub mode, 2 for standby mode.
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
@ -71,6 +79,29 @@ properties:
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:
@ -92,6 +123,25 @@ examples:
};
};
- |
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>