atmel,sam0-gclk

Vendor: Atmel Corporation

Description

Atmel SAMD0 Generic Clock Controller (GCLK)

Properties

Properties not inherited from the base binding file.

Name

Type

Details

#clock-cells

int

 
- The ID cell is the peripheral identification.

These information are used on GCLK->CLKCTRL register to select the
clock for an specific peripheral.

Example 1: Connect the XOSC32K to RTC on SAMD2x
  Assuming that generator 2 have the following configuration:
    GLKC->GENCTRL:
      SRC: 5 (XOSC32K)
      ID:  2 (Generator 2)

  Then to enable the clock to the peripheral
  Generator:     2
  Identificator: 4 (GCLK_RTC)

    &rtc {
      /* The peripheral is fixed and it is defined at soc devictree
       * clocks property
       */
      clocks = <&gclk 4>, <&pm 0x18 5>;
      clock-names = "GCLK", "PM";

      /* The generator is user selectable and because of that it is
       * defined at board
       */
      atmel,assigned-clocks = <&gclk 2>;
      atmel,assigned-clock-names = "GCLK";
    };

Example 2: Connect the XOSC32K to RTC on SAMD5x
  In the SAMD5x the RTC is direct connected on the OSC32KCTRL and no
  generator is used. See atmel,sam0-osc32kctrl.yaml for reference.

This property is required.

Constant value: 1

#atmel,assigned-clock-cells

int

 
- The GEN cell is an integer number that represents the index of
the generic clock generator. It is usually a number between 0~8
but could be more depending of the SoC.

This property is required.

Constant value: 1

atmel,assigned-clocks

phandle-array

 
Assigned-clock information

atmel,assigned-clock-names

string-array

 
Name of each assigned-clock

Specifier cell names

  • clock cells: id

  • atmel,assigned-clock cells: gen