On 06/09/2026 05:24, Hongliang Yang wrote:
quoted hunk ↗ jump to hunk
Add device tree binding for the per-controller RCSU register regions
of the CIX Sky1 USBSSP controllers. The regions are exposed as syscon
nodes; USBSSP glue nodes reference their per-controller registers
through the cix,usb-rcsu phandle with register offsets.
The per-controller RCSU control and status registers live in a shared
RCSU region described by the cix,sky1-usbss-rcsu binding and are
referenced through the cix,usb-rcsu phandle.
Signed-off-by: Hongliang Yang <redacted>
---
.../bindings/usb/cix,sky1-usbss-rcsu.yaml | 46 +++++++++++++++++++
MAINTAINERS | 1 +
2 files changed, 47 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/cix,sky1-usbss-rcsu.yaml
diff --git a/Documentation/devicetree/bindings/usb/cix,sky1-usbss-rcsu.yaml b/Documentation/devicetree/bindings/usb/cix,sky1-usbss-rcsu.yaml
new file mode 100644
index 000000000000..d0c54fd2cd5f
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/cix,sky1-usbss-rcsu.yaml
@@ -0,0 +1,46 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/cix,sky1-usbss-rcsu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: CIX Sky1 USBSSP RCSU system controller
+
+maintainers:
+ - Hongliang Yang <hongliang.yang@cixtech.com>
+
+description:
+ The CIX Sky1 USBSSP controllers integrate their per-instance glue
+ registers (AXI bus attribute configuration and controller status)
+ inside a shared RCSU register region in the SoC system control
+ aperture. This binding describes that region as a syscon, so USBSSP
In the description you describe hardware, not binding.
+ glue nodes can reference their register offsets through the
+ cix,usb-rcsu phandle (see cix,sky1-usbssp.yaml).
Syscon is not a USB device. This is not supposed to be in USB.
Best regards,
Krzysztof