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.

  Up to 2 output clocks could be supported and for each output clock, the
  frequency can be computed with the following formula:

    f(PLLCLK) = f(PLLIN) x PLLMUL       --> SYSCLK (System Clock)
    f(USBCLK) = f(PLLCLK) * 2 / USBPRE  --> USB

    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