dts/bindings/clock/st,stm32f105-pll-clock.yaml

# Copyright (c) 2021, Linaro ltd
# SPDX-License-Identifier: Apache-2.0

description: |
  Main PLL node binding for Connectivity line devices (STM32F105/STM32F107)

  Takes one of clk_hse, pll2 or clk_hsi as input clock.
  When clk_hsi is used a fixed prescaler is applied. When input clock is hse or
  pll2, configurable prescaler is used.

  Output clock frequency can be computed with the following formula:

    f(PLLCLK) = f(PLLIN) x PLLMUL         --> SYSCLK (System Clock)

    with, depending on the case:
            f(PLLIN) = f(input_clk) / 2       if input_clk = clk_hsi
            f(PLLIN) = f(input_clk) / PREDIV  if input_clk = clk_hse or pll2

  The PLL output frequency must not exceed 72 MHz.


compatible: "st,stm32f105-pll-clock"

include: [clock-controller.yaml, base.yaml]

properties:
  "#clock-cells":
    const: 0

  clocks:
    required: true

  mul:
    type: int
    required: true
    description: |
        Main PLL multiplication factor for VCO.
        Note: For x6.5 multiplier value, please use "mul = <15>;"
    enum:
      - 4   # x4
      - 5   # x5
      - 6   # x6
      - 7   # x7
      - 8   # x8
      - 9   # x9
      - 15  # x6.5

  prediv:
    type: int
    required: true
    description: |
        Configurable prescaler
        Valid range: 1 - 16

  otgfspre:
    type: boolean
    description: |
        Optional PLL output divisor to generate a 48MHz USB clock.
        When set, PLL output clock is not divided.
        Otherwise, PLL output clock is divided by 1.5.