atmel,sam-pmc

Vendor: Atmel Corporation

Note

An implementation of a driver matching this compatible is available in drivers/clock_control/clock_control_sam_pmc.c.

Description

Atmel Power Management Controller (PMC)

The Power Management Controller (PMC) optimizes power consumption by
controlling all system and user peripheral clocks. The PMC enables/disables
the clock inputs to many of the peripherals and the processor.

To specify the clocks in a peripheral, the standard clocks property needs
to be used, e.g.:

  uart: uart@xxx {
    ...
    clocks = <&pmc PMC_TYPE_PERIPHERAL p-id>;
    ...
  };

In this example the clock-type was defined as PMC_TYPE_PERIPHERAL and the
peripheral-id was defined as p-id. The p-id number should be consulted on
datasheet, usually it is available at Product Mapping figure.

NOTE: The predefined clock type cell is defined at
include/zephyr/drivers/clock_clontrol/atmel_sam_pmc.h header file.

The clock-type constants are:
  PMC_TYPE_CORE
  PMC_TYPE_SYSTEM
  PMC_TYPE_PERIPHERAL
  PMC_TYPE_GCK
  PMC_TYPE_PROGRAMMABLE

Properties

Properties not inherited from the base binding file.

Name

Type

Details

#clock-cells

int

from common clock binding; shall be set to 2. The first entry is the type
of the clock (core, system, peripheral or generated) and the second entry
it's the peripheral identification index as provided by the datasheet.

This property is required.

Constant value: 2

Specifier cell names

  • clock cells: clock-type, peripheral-id