dt-bindings: i2c: npcm7xx: add NPCM I2C controller

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/i2c/nuvoton,npcm7xx-i2c.yaml#

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

title: nuvoton NPCM7XX I2C Controller Device Tree Bindings

description: |

  The NPCM750x includes sixteen I2C bus controllers. All Controllers support

  both master and slave mode. Each controller can switch between master and slave

  at run time (i.e. IPMB mode). Each controller has two 16 byte HW FIFO for TX and

  RX.

maintainers:

  - Tali Perry <tali.perry1@gmail.com>

properties:

  compatible:

    const: nuvoton,npcm7xx-i2c

  reg:

    maxItems: 1

  interrupts:

    maxItems: 1

  clocks:

    maxItems: 1

    description: Reference clock for the I2C bus

  clock-frequency:

    description: Desired I2C bus clock frequency in Hz. If not specified,

                 the default 100 kHz frequency will be used.

                 possible values are 100000, 400000 and 1000000.

    default: 100000

    enum: [100000, 400000, 1000000]

required:

  - compatible

  - reg

  - interrupts

  - clocks

allOf:

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

unevaluatedProperties: false

examples:

  - |

    #include <dt-bindings/clock/nuvoton,npcm7xx-clock.h>

    #include <dt-bindings/interrupt-controller/arm-gic.h>

    i2c0: i2c@80000 {

        reg = <0x80000 0x1000>;

        clocks = <&clk NPCM7XX_CLK_APB2>;

        clock-frequency = <100000>;

        interrupts = <GIC_SPI 64 IRQ_TYPE_LEVEL_HIGH>;

        compatible = "nuvoton,npcm750-i2c";

    };

...