CPU_FREQ

CPU_FREQ API Status

API
`bk_cpu_freq_acquire()`
`bk_cpu_freq_release()`
`bk_cpu_freq_get_current_sys_clock()`

CPU_FREQ API Reference

Header File

component/cpu_freq/cpu_freq.h

Functions

int32_t bk_cpu_freq_acquire(uint32_t clk_hz)

request the default cpu work on the desired clock:clk_hz

用户期望调整cpu到一个工作频率时调用

参数:

clk_hz – [in] desired cpu clock in hz, see the define CPU_FREQ_xxM

返回值:

0 – success [BK_RET_OK]
other – fail

返回:

result

int32_t bk_cpu_freq_release(uint32_t clk_hz)

tell the default cpu do not need to work on the desired clock:clk_hz

用户不再期望cpu工作在该频率时调用，一般是和 bk_cpu_freq_acquire() 配套调用

参数:

clk_hz – [in] desired cpu clock in hz, see the define CPU_FREQ_xxM

返回值:

0 – success [BK_RET_OK]
other – fail

返回:

result

uint16_t bk_cpu_freq_get_current_sys_clock(void)

get current system clock (cpu/bus clock)

返回:: current system clock

Macros

CPU_FREQ_26M

CPU_FREQ_32M

CPU_FREQ_40M

CPU_FREQ_48M

CPU_FREQ_52M

CPU_FREQ_78M

CPU_FREQ_96M

CPU_FREQ_104M

CPU_FREQ_120M

CPU_FREQ_156M

CPU_FREQ_312M

CPU_FREQ_ON_XTAL

CPU_FREQ_MAX_CLK

CPU_FREQ_MAX_CLK_UP_VOL_LVL1

CPU_FREQ_MAX_CLK_UP_VOL_LVL2

CPU_FREQ_MAX_CLK_UP_VOL_LVL3

SYS_VDDDIG_VOL_LVL1

SYS_VDDDIG_VOL_LVL2

SYS_VDDDIG_VOL_LVL3

SYS_VDDDIG_VOL_LVL4

BK_CPU_FREQ_ACQUIRE(x)

BK_CPU_FREQ_RELEASE(x)