From: Emanuele Ghidoli <emanuele.ghidoli@xxxxxxxxxxx>
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@xxxxxxxxxxx>
Signed-off-by: Francesco Dolcini <francesco.dolcini@xxxxxxxxxxx>
---
.../devicetree/bindings/usb/smsc,usb3503.yaml | 54 ++++++++++++++++++-
1 file changed, 52 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/usb/smsc,usb3503.yaml b/Documentation/devicetree/bindings/usb/smsc,usb3503.yaml
index a09f4528aea3..6156dc26e65c 100644
--- a/Documentation/devicetree/bindings/usb/smsc,usb3503.yaml
+++ b/Documentation/devicetree/bindings/usb/smsc,usb3503.yaml
@@ -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>
--
2.25.1
