Commit 86251cf8 authored by Tomi Valkeinen's avatar Tomi Valkeinen Committed by Mauro Carvalho Chehab
Browse files

media: dt-bindings: i2c: Add I2C Address Translator (ATR) 



Add bindings for I2C Address Translator. Only one property is added,
'i2c-alias-pool', which can be used in the bindings for the device that
supports ATR.

Signed-off-by: default avatarTomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Acked-by: default avatarWolfram Sang <wsa@kernel.org>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@kernel.org>
parent 26ce7054

Documentation/devicetree/bindings/i2c/i2c-atr.yaml

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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause

%YAML 1.2

---

$id: http://devicetree.org/schemas/i2c/i2c-atr.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#



title: Common i2c address translator properties



maintainers:

  - Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>



description:

  An I2C Address Translator (ATR) is a device with an I2C slave parent

  ("upstream") port and N I2C master child ("downstream") ports, and

  forwards transactions from upstream to the appropriate downstream port

  with a modified slave address. The address used on the parent bus is

  called the "alias" and is (potentially) different from the physical

  slave address of the child bus. Address translation is done by the

  hardware.



properties:

  i2c-alias-pool:

    $ref: /schemas/types.yaml#/definitions/uint32-array

    description:

      I2C alias pool is a pool of I2C addresses on the main I2C bus that can be

      used to access the remote peripherals on the serializer's I2C bus. The

      addresses must be available, not used by any other peripheral. Each

      remote peripheral is assigned an alias from the pool, and transactions to

      that address will be forwarded to the remote peripheral, with the address

      translated to the remote peripheral's real address. This property is not

      needed if there are no I2C addressable remote peripherals.



additionalProperties: true

...