blob: d2f01e8989b52a41f475ca83aff6bc9bca3c65c2 [file] [log] [blame]
# 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.