st,stm32l4-pll-clock

Vendor: STMicroelectronics N.V.

Description

PLL node binding for STM32L4 and STM32L5 devices

It can be used to describe 3 different PLLs: PLL, PLLSAI1 and PLLSAI2.
Only main PLL is supported for now.

These PLLs could take one of clk_hse, clk_hsi or clk_msi as input clock, with
an input frequency from 4 to 16 MHz. PLLM factor is used to set the input
clock in this acceptable range.

Each PLL can have up to 3 output clocks and for each output clock, the
frequency can be computed with the following formulae:

  f(PLL_P) = f(VCO clock) / PLLP  --> PLLSAI3CLK
  f(PLL_Q) = f(VCO clock) / PLLQ  --> PLL48M1CLK
  f(PLL_R) = f(VCO clock) / PLLR  --> PLLCLK (System Clock)

    with f(VCO clock) = f(PLL clock input) × (PLLN / PLLM)

The PLL output frequency must not exceed 80 MHz.

Properties

Node specific properties

Properties not inherited from the base binding file.

Name	Type	Details
#clock-cells	int	Number of items to expect in a Clock specifier This property is required.
div-m	int	Division factor for the main PLL and audio PLLs (PLLSAI1 and PLLSAI2) input clock Valid range: 1 - 8 This property is required.
mul-n	int	Main PLL multiplication factor for VCO Valid range: 8 - 86 This property is required.
div-p	int	Main PLL division factor for PLLSAI3CLK Legal values: 7, 17
div-q	int	Main PLL division factor for PLL48M1CLK (48 MHz clock). Legal values: 2, 4, 6, 8
div-r	int	Main PLL division factor for PLLCLK (system clock) This property is required. Legal values: 2, 4, 6, 8

Deprecated node specific properties

Deprecated properties not inherited from the base binding file.

(None)

Base properties

Properties inherited from the base binding file, which defines common properties that may be set on many nodes. Not all of these may apply to the “st,stm32l4-pll-clock” compatible.

Name	Type	Details
clocks	phandle-array	Clock gate information This property is required.
status	string	indicates the operational status of a device Legal values: 'ok', 'okay', 'disabled', 'reserved', 'fail', 'fail-sss' See Important properties for more information.
compatible	string-array	compatible strings This property is required. See Important properties for more information.
reg	array	register space See Important properties for more information.
reg-names	string-array	name of each register space
interrupts	array	interrupts for device See Important properties for more information.
interrupts-extended	compound	extended interrupt specifier for device
interrupt-names	string-array	name of each interrupt
interrupt-parent	phandle	phandle to interrupt controller node
label	string	Human readable string describing the device (used as device_get_binding() argument) See Important properties for more information. This property is deprecated.
clock-names	string-array	name of each clock
#address-cells	int	number of address cells in reg property
#size-cells	int	number of size cells in reg property
dmas	phandle-array	DMA channels specifiers
dma-names	string-array	Provided names of DMA channel specifiers
io-channels	phandle-array	IO channels specifiers
io-channel-names	string-array	Provided names of IO channel specifiers
mboxes	phandle-array	mailbox / IPM channels specifiers
mbox-names	string-array	Provided names of mailbox / IPM channel specifiers
power-domains	phandle-array	Power domain specifiers
power-domain-names	string-array	Provided names of power domain specifiers
#power-domain-cells	int	Number of cells in power-domains property
zephyr,deferred-init	boolean	Do not initialize device automatically on boot. Device should be manually initialized using device_init().
wakeup-source	boolean	Property to identify that a device can be used as wake up source. When this property is provided a specific flag is set into the device that tells the system that the device is capable of wake up the system. Wake up capable devices are disabled (interruptions will not wake up the system) by default but they can be enabled at runtime if necessary.
zephyr,pm-device-runtime-auto	boolean	Automatically configure the device for runtime power management after the init function runs.
zephyr,disabling-power-states	phandles	List of power states that will disable this device power.