Bouffalo Lab

Files
file	clock_control_bflb_common.h
	Timing and clock helpers common to all Bouffalo Lab platforms.

Functions
static void	clock_bflb_settle (void)
	Busy-wait for a few CPU cycles to let a clock change settle.
static void	clock_bflb_set_root_clock (uint32_t clock)
	Select the root (main) clock source.
static uint32_t	clock_bflb_get_root_clock (void)
	Get the currently selected root (main) clock source.

Main clock mux selections (see clock_bflb_set_root_clock())
#define	BFLB_MAIN_CLOCK_RC32M   0
	XCLK is RC32M, main clock is XCLK.
#define	BFLB_MAIN_CLOCK_XTAL   1
	XCLK is the crystal, main clock is XCLK.
#define	BFLB_MAIN_CLOCK_PLL_RC32M   2
	XCLK is RC32M, main clock is the PLL.
#define	BFLB_MAIN_CLOCK_PLL_XTAL   3
	XCLK is the crystal, main clock is the PLL.

Detailed Description

Macro Definition Documentation

BFLB_MAIN_CLOCK_PLL_RC32M

#define BFLB_MAIN_CLOCK_PLL_RC32M   2

#include <zephyr/drivers/clock_control/clock_control_bflb_common.h>

XCLK is RC32M, main clock is the PLL.

BFLB_MAIN_CLOCK_PLL_XTAL

#define BFLB_MAIN_CLOCK_PLL_XTAL   3

#include <zephyr/drivers/clock_control/clock_control_bflb_common.h>

XCLK is the crystal, main clock is the PLL.

BFLB_MAIN_CLOCK_RC32M

#define BFLB_MAIN_CLOCK_RC32M   0

#include <zephyr/drivers/clock_control/clock_control_bflb_common.h>

XCLK is RC32M, main clock is XCLK.

BFLB_MAIN_CLOCK_XTAL

#define BFLB_MAIN_CLOCK_XTAL   1

#include <zephyr/drivers/clock_control/clock_control_bflb_common.h>

XCLK is the crystal, main clock is XCLK.

Function Documentation

clock_bflb_get_root_clock()

uint32_t clock_bflb_get_root_clock ( void )

inlinestatic

#include <zephyr/drivers/clock_control/clock_control_bflb_common.h>

Get the currently selected root (main) clock source.

Returns

One of the BFLB_MAIN_CLOCK_* selections.

clock_bflb_set_root_clock()

void clock_bflb_set_root_clock ( uint32_t clock )

inlinestatic

#include <zephyr/drivers/clock_control/clock_control_bflb_common.h>

Select the root (main) clock source.

Parameters

clock

One of the BFLB_MAIN_CLOCK_* selections. Out-of-range values fall back to BFLB_MAIN_CLOCK_RC32M.

clock_bflb_settle()

void clock_bflb_settle ( void )

inlinestatic

#include <zephyr/drivers/clock_control/clock_control_bflb_common.h>

Busy-wait for a few CPU cycles to let a clock change settle.