| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/reset/st,stih407-powerdown.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: STMicroelectronics STi family Sysconfig Peripheral Powerdown Reset Controller |
| 8 | |
| 9 | maintainers: |
| 10 | - Srinivas Kandagatla <srinivas.kandagatla@st.com> |
| 11 | |
| 12 | description: | |
| 13 | This binding describes a reset controller device that is used to enable and |
| 14 | disable on-chip peripheral controllers such as USB and SATA, using |
| 15 | "powerdown" control bits found in the STi family SoC system configuration |
| 16 | registers. These have been grouped together into a single reset controller |
| 17 | device for convenience. |
| 18 | |
| 19 | The actual action taken when powerdown is asserted is hardware dependent. |
| 20 | However, when asserted it may not be possible to access the hardware's |
| 21 | registers and after an assert/deassert sequence the hardware's previous state |
| 22 | may no longer be valid. |
| 23 | |
| 24 | properties: |
| 25 | compatible: |
| 26 | const: st,stih407-powerdown |
| 27 | |
| 28 | '#reset-cells': |
| 29 | const: 1 |
| 30 | |
| 31 | required: |
| 32 | - compatible |
| 33 | - '#reset-cells' |
| 34 | |
| 35 | additionalProperties: false |
| 36 | |
| 37 | examples: |
| 38 | - | |
| 39 | #include <dt-bindings/reset/stih407-resets.h> |
| 40 | |
| 41 | powerdown: powerdown-controller { |
| 42 | compatible = "st,stih407-powerdown"; |
| 43 | #reset-cells = <1>; |
| 44 | }; |
| 45 | |
| 46 | // Specifying powerdown control of devices: |
| 47 | st_dwc3: dwc3 { |
| 48 | resets = <&powerdown STIH407_USB3_POWERDOWN>; |
| 49 | }; |