Commit 26c1bc67 authored by Marek Vasut's avatar Marek Vasut Committed by Stephen Boyd
Browse files

dt-bindings: clk: rs9: Add Renesas 9-series I2C PCIe clock generator 



Add binding for Renesas 9-series PCIe clock generators. This binding
is designed to support 9FGV/9DBV/9DMV/9FGL/9DML/9QXL/9SQ series I2C
PCIe clock generators, currently the only tested and supported chip
is 9FGV0241.

Signed-off-by: default avatarMarek Vasut <marex@denx.de>
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: devicetree@vger.kernel.org
Link: https://lore.kernel.org/r/20220226040723.143705-1-marex@denx.de


Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
parent 9a771038

Documentation/devicetree/bindings/clock/renesas,9series.yaml

0 → 100644
+97 −0
Original line number Diff line number Diff line 
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/clock/renesas,9series.yaml#

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



title: Binding for Renesas 9-series I2C PCIe clock generators



description: |

  The Renesas 9-series are I2C PCIe clock generators providing

  from 1 to 20 output clocks.



  When referencing the provided clock in the DT using phandle

  and clock specifier, the following mapping applies:



  - 9FGV0241:

    0 -- DIF0

    1 -- DIF1



maintainers:

  - Marek Vasut <marex@denx.de>



properties:

  compatible:

    enum:

      - renesas,9fgv0241



  reg:

    description: I2C device address

    enum: [ 0x68, 0x6a ]



  '#clock-cells':

    const: 1



  clocks:

    items:

      - description: XTal input clock



  renesas,out-amplitude-microvolt:

    enum: [ 600000, 700000, 800000, 900000 ]

    description: Output clock signal amplitude



  renesas,out-spread-spectrum:

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

    enum: [ 100000, 99750, 99500 ]

    description: Output clock down spread in pcm (1/1000 of percent)



patternProperties:

  "^DIF[0-19]$":

    type: object

    description:

      Description of one of the outputs (DIF0..DIF19).



    properties:

      renesas,slew-rate:

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

        enum: [ 2000000, 3000000 ]

        description: Output clock slew rate select in V/ns



    additionalProperties: false



required:

  - compatible

  - reg

  - clocks

  - '#clock-cells'



additionalProperties: false



examples:

  - |

    /* 25MHz reference crystal */

    ref25: ref25m {

        compatible = "fixed-clock";

        #clock-cells = <0>;

        clock-frequency = <25000000>;

    };



    i2c@0 {

        reg = <0x0 0x100>;

        #address-cells = <1>;

        #size-cells = <0>;



        rs9: clock-generator@6a {

            compatible = "renesas,9fgv0241";

            reg = <0x6a>;

            #clock-cells = <1>;



            clocks = <&ref25m>;



            DIF0 {

                renesas,slew-rate = <3000000>;

            };

        };

    };



...