Resguardo inicial

2026-09-06 12:53:21 -06:00
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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/reset/st,stih407-powerdown.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: STMicroelectronics STi family Sysconfig Peripheral Powerdown Reset Controller
+
+maintainers:
+  - Srinivas Kandagatla <srinivas.kandagatla@st.com>
+
+description: |
+  This binding describes a reset controller device that is used to enable and
+  disable on-chip peripheral controllers such as USB and SATA, using
+  "powerdown" control bits found in the STi family SoC system configuration
+  registers. These have been grouped together into a single reset controller
+  device for convenience.
+
+  The actual action taken when powerdown is asserted is hardware dependent.
+  However, when asserted it may not be possible to access the hardware's
+  registers and after an assert/deassert sequence the hardware's previous state
+  may no longer be valid.
+
+properties:
+  compatible:
+    const: st,stih407-powerdown
+
+  '#reset-cells':
+    const: 1
+
+required:
+  - compatible
+  - '#reset-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/reset/stih407-resets.h>
+
+    powerdown: powerdown-controller {
+        compatible = "st,stih407-powerdown";
+        #reset-cells = <1>;
+    };
+
+    // Specifying powerdown control of devices:
+    st_dwc3: dwc3 {
+        resets = <&powerdown STIH407_USB3_POWERDOWN>;
+    };