st,stm32f105-pll-clock

Vendor: STMicroelectronics

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.

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.

mul

int

 
Main PLL multiplication factor for VCO.
Note: For x6.5 multiplier value, please use "mul = <15>;"

This property is required.

Legal values: 4, 5, 6, 7, 8, 9, 15

prediv

int

 
Configurable prescaler
Valid range: 1 - 16

This property is required.

otgfspre

boolean

 
Otpional 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.