* [PATCH v2 1/2] dt-bindings: usb: Add binding for WCH CH334/CH335 hub controller
2026-01-13 9:58 [PATCH v2 0/2] usb: misc: onboard_dev: Add WCH CH334 USB2.0 Hub (1a86:8091) Chaoyi Chen
@ 2026-01-13 9:58 ` Chaoyi Chen
2026-01-15 18:49 ` Rob Herring (Arm)
2026-01-13 9:58 ` [PATCH v2 2/2] usb: misc: onboard_dev: Add WCH CH334 USB2.0 Hub (1a86:8091) Chaoyi Chen
1 sibling, 1 reply; 4+ messages in thread
From: Chaoyi Chen @ 2026-01-13 9:58 UTC (permalink / raw)
To: Greg Kroah-Hartman, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Catalin Popescu, Stephen Boyd, Jens Glathe,
Dmitry Baryshkov, Mike Looijmans, Pin-yen Lin, J. Neuschäfer,
Quentin Schulz
Cc: linux-usb, devicetree, linux-kernel, Chaoyi Chen
From: Chaoyi Chen <chaoyi.chen@rock-chips.com>
The WCH CH334/CH335[0] are USB2.0 protocol compliant 4-port USB HUB
controller chips, supporting USB2.0 high-speed and full-speed for
upstream ports, and USB2.0 high-speed 480Mbps, full-speed 12Mbps and
low-speed 1.5Mbps for downstream ports, supporting not only low-cost STT
mode (single TT schedules 4 downstream ports in time share), but also
supports high performance MTT mode (4 TTs each corresponding to 1 port,
concurrent processing).
Add a device tree binding for it.
[0]: https://www.wch-ic.com/downloads/CH334DS1_PDF.html
Signed-off-by: Chaoyi Chen <chaoyi.chen@rock-chips.com>
---
Changes in v2:
- Fix the incorrect reset GPIO polarity.
- Use a more meaningful supply name.
---
.../devicetree/bindings/usb/wch,ch334.yaml | 65 +++++++++++++++++++
1 file changed, 65 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/wch,ch334.yaml
diff --git a/Documentation/devicetree/bindings/usb/wch,ch334.yaml b/Documentation/devicetree/bindings/usb/wch,ch334.yaml
new file mode 100644
index 000000000000..2fdca14dc1de
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/wch,ch334.yaml
@@ -0,0 +1,65 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/wch,ch334.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: WCH CH334/CH335 USB 2.0 Hub Controller
+
+maintainers:
+ - Chaoyi Chen <kernel@airkyi.com>
+
+allOf:
+ - $ref: usb-hub.yaml#
+
+properties:
+ compatible:
+ enum:
+ - usb1a86,8091
+
+ reg: true
+
+ reset-gpios:
+ description: GPIO controlling the RESET# pin.
+
+ vdd33-supply:
+ description:
+ The regulator that provides 3.3V core power to the hub.
+
+ v5-supply:
+ description:
+ The regulator that provides 3.3V or 5V power to the hub.
+
+ ports:
+ $ref: /schemas/graph.yaml#/properties/ports
+
+ patternProperties:
+ '^port@':
+ $ref: /schemas/graph.yaml#/properties/port
+
+ properties:
+ reg:
+ minimum: 1
+ maximum: 4
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ usb {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ hub: hub@1 {
+ compatible = "usb1a86,8091";
+ reg = <1>;
+ reset-gpios = <&gpio0 2 GPIO_ACTIVE_LOW>;
+ v5-supply = <&vcc_3v3>;
+ vdd33-supply = <&vcc_3v3>;
+ };
+ };
--
2.51.1
^ permalink raw reply related [flat|nested] 4+ messages in thread* [PATCH v2 2/2] usb: misc: onboard_dev: Add WCH CH334 USB2.0 Hub (1a86:8091)
2026-01-13 9:58 [PATCH v2 0/2] usb: misc: onboard_dev: Add WCH CH334 USB2.0 Hub (1a86:8091) Chaoyi Chen
2026-01-13 9:58 ` [PATCH v2 1/2] dt-bindings: usb: Add binding for WCH CH334/CH335 hub controller Chaoyi Chen
@ 2026-01-13 9:58 ` Chaoyi Chen
1 sibling, 0 replies; 4+ messages in thread
From: Chaoyi Chen @ 2026-01-13 9:58 UTC (permalink / raw)
To: Greg Kroah-Hartman, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Catalin Popescu, Stephen Boyd, Jens Glathe,
Dmitry Baryshkov, Mike Looijmans, Pin-yen Lin, J. Neuschäfer,
Quentin Schulz
Cc: linux-usb, devicetree, linux-kernel, Chaoyi Chen
From: Chaoyi Chen <chaoyi.chen@rock-chips.com>
The WCH CH334/CH335[0] are USB2.0 protocol compliant 4-port USB HUB
controller chips, supporting USB2.0 high-speed and full-speed for
upstream ports, and USB2.0 high-speed 480Mbps, full-speed 12Mbps and
low-speed 1.5Mbps for downstream ports, supporting not only low-cost STT
mode (single TT schedules 4 downstream ports in time share), but also
supports high performance MTT mode (4 TTs each corresponding to 1 port,
concurrent processing).
[0]: https://www.wch-ic.com/downloads/CH334DS1_PDF.html
Signed-off-by: Chaoyi Chen <chaoyi.chen@rock-chips.com>
---
drivers/usb/misc/onboard_usb_dev.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/usb/misc/onboard_usb_dev.h b/drivers/usb/misc/onboard_usb_dev.h
index c1462be5526d..1a1e86e60e04 100644
--- a/drivers/usb/misc/onboard_usb_dev.h
+++ b/drivers/usb/misc/onboard_usb_dev.h
@@ -115,6 +115,13 @@ static const struct onboard_dev_pdata vialab_vl817_data = {
.is_hub = true,
};
+static const struct onboard_dev_pdata wch_ch334_data = {
+ .reset_us = 14000,
+ .num_supplies = 2,
+ .supply_names = { "vdd33", "v5" },
+ .is_hub = true,
+};
+
static const struct onboard_dev_pdata xmos_xvf3500_data = {
.reset_us = 1,
.num_supplies = 2,
@@ -146,6 +153,7 @@ static const struct of_device_id onboard_dev_match[] = {
{ .compatible = "usbbda,5411", .data = &realtek_rts5411_data, },
{ .compatible = "usbbda,414", .data = &realtek_rts5411_data, },
{ .compatible = "usbbda,5414", .data = &realtek_rts5411_data, },
+ { .compatible = "usb1a86,8091", .data = &wch_ch334_data, },
{ .compatible = "usb1da0,5511", .data = ¶de_ps5511_data, },
{ .compatible = "usb1da0,55a1", .data = ¶de_ps5511_data, },
{ .compatible = "usb2109,817", .data = &vialab_vl817_data, },
--
2.51.1
^ permalink raw reply related [flat|nested] 4+ messages in thread