Commit 4a875cf1 authored by Farouk Bouabid's avatar Farouk Bouabid Committed by Andi Shyti
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dt-bindings: i2c: add support for tsd,mule-i2c-mux 



Theobroma Systems Mule is an MCU that emulates a set of I2C devices,
among which devices that are reachable through an I2C-mux. The devices
on the mux can be selected by writing the appropriate device number to
an I2C config register.

Reviewed-by: default avatarRob Herring (Arm) <robh@kernel.org>
Acked-by: default avatarWolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: default avatarFarouk Bouabid <farouk.bouabid@cherry.de>
Reviewed-by: default avatarGuenter Roeck <linux@roeck-us.net>
Reviewed-by: default avatarWolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: default avatarAndi Shyti <andi.shyti@kernel.org>
parent 8f65c455

Documentation/devicetree/bindings/i2c/tsd,mule-i2c-mux.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/tsd,mule-i2c-mux.yaml#

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



title: Theobroma Systems Mule I2C multiplexer



maintainers:

  - Farouk Bouabid <farouk.bouabid@cherry.de>

  - Quentin Schulz <quentin.schulz@cherry.de>



description: |

  Theobroma Systems Mule is an MCU that emulates a set of I2C devices, among

  which devices that are reachable through an I2C-mux. The devices on the mux

  can be selected by writing the appropriate device number to an I2C config

  register.





      +--------------------------------------------------+

      | Mule                                             |

  0x18|    +---------------+                             |

  -------->|Config register|----+                        |

      |    +---------------+    |                        |

      |                         V_                       |

      |                        |  \          +--------+  |

      |                        |   \-------->| dev #0 |  |

      |                        |   |         +--------+  |

  0x6f|                        | M |-------->| dev #1 |  |

  ---------------------------->| U |         +--------+  |

      |                        | X |-------->| dev #2 |  |

      |                        |   |         +--------+  |

      |                        |   /-------->| dev #3 |  |

      |                        |__/          +--------+  |

      +--------------------------------------------------+





allOf:

  - $ref: /schemas/i2c/i2c-mux.yaml#



properties:

  compatible:

    const: tsd,mule-i2c-mux



required:

  - compatible



unevaluatedProperties: false



examples:

  - |

    i2c-mux {

        compatible = "tsd,mule-i2c-mux";

        #address-cells = <1>;

        #size-cells = <0>;



        i2c@0 {

            reg = <0x0>;

            #address-cells = <1>;

            #size-cells = <0>;



            rtc@6f {

                compatible = "isil,isl1208";

                reg = <0x6f>;

            };

        };

    };

...