| 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/i2c/i2c-atr.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Common i2c address translator properties |
| 8 | |
| 9 | maintainers: |
| 10 | - Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> |
| 11 | |
| 12 | description: |
| 13 | An I2C Address Translator (ATR) is a device with an I2C slave parent |
| 14 | ("upstream") port and N I2C master child ("downstream") ports, and |
| 15 | forwards transactions from upstream to the appropriate downstream port |
| 16 | with a modified slave address. The address used on the parent bus is |
| 17 | called the "alias" and is (potentially) different from the physical |
| 18 | slave address of the child bus. Address translation is done by the |
| 19 | hardware. |
| 20 | |
| 21 | properties: |
| 22 | i2c-alias-pool: |
| 23 | $ref: /schemas/types.yaml#/definitions/uint32-array |
| 24 | description: |
| 25 | I2C alias pool is a pool of I2C addresses on the main I2C bus that can be |
| 26 | used to access the remote peripherals on the serializer's I2C bus. The |
| 27 | addresses must be available, not used by any other peripheral. Each |
| 28 | remote peripheral is assigned an alias from the pool, and transactions to |
| 29 | that address will be forwarded to the remote peripheral, with the address |
| 30 | translated to the remote peripheral's real address. This property is not |
| 31 | needed if there are no I2C addressable remote peripherals. |
| 32 | |
| 33 | additionalProperties: true |
| 34 | ... |