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cpu/lpc2387: export functions to init PLL & MAM

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Those functions are needed after wake from lower sleep modes.
This commit is contained in:
Benjamin Valentin 2020-04-29 17:59:00 +02:00
parent 80b300289d
commit 3b257f9a5a
2 changed files with 14 additions and 8 deletions
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12
cpu/lpc2387/clocks.c
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@ -43,14 +43,14 @@ static inline void pllfeed(void)
* @brief Enabling MAM and setting number of clocks used for Flash memory fetch
* @internal
*/
static inline void init_mam(void)
void cpu_init_mam(void)
{
MAMCR = 0x0000;
MAMTIM = 0x0003;
MAMCR = 0x0002;
}
static void init_clks1(void)
void cpu_init_pll(void)
{
/* Disconnect PLL */
PLLCON &= ~0x0002;
@ -88,10 +88,7 @@ static void init_clks1(void)
/* Set clock divider to 4 (value+1) */
CCLKCFG = CL_CPU_DIV - 1; /* Fcpu = 72 MHz */
}
static void init_clks2(void)
{
/* Wait for the PLL to lock to set frequency */
while (!(PLLSTAT & BIT26));
@ -114,7 +111,6 @@ void cpu_init_clks(void)
{
watchdog_init();
PCONP = PCRTC; /* switch off everything except RTC */
init_clks1();
init_clks2();
init_mam();
cpu_init_pll();
cpu_init_mam();
}

10
cpu/lpc2387/include/cpu.h
View File

@ -28,6 +28,16 @@ extern "C" {
extern uintptr_t __stack_start; /**< end of user stack memory space */
/**
* @brief Initialize the phase lock loop oscillator
*/
void cpu_init_pll(void);
/**
* @brief Initialize the Memory Acceleration Module
*/
void cpu_init_mam(void);
/**
* @brief Scale lpc2387 cpu speed
*/