michaelh/zephyr
1
0
Fork 0
Code Releases Activity

soc: same70: don't switch main clock if already did

Browse source 
Don't switch clock to external clock again if the
bootloader already did.

Signed-off-by: qianfan Zhao <qianfanguijin@163.com>
This commit is contained in:
qianfan Zhao 2018-11-19 13:57:24 +08:00 • committed by Maureen Helm
commit c43a116f41
1 changed files with 10 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

20
soc/arm/atmel_sam/same70/soc.c
View file

@ -71,7 +71,7 @@ static ALWAYS_INLINE void clock_init(void)
* by a previous program i.e. bootloader
*/
if (PMC->PMC_SR & PMC_SR_MOSCRCS) {
if (!(PMC->CKGR_MOR & CKGR_MOR_MOSCSEL_Msk)) {
/* Start the external crystal oscillator */
PMC->CKGR_MOR = CKGR_MOR_KEY_PASSWD
/* We select maximum setup time.
@ -100,17 +100,17 @@ static ALWAYS_INLINE void clock_init(void)
while (!(PMC->PMC_SR & PMC_SR_MOSCSELS)) {
;
}
}
/* Turn off RC OSC, not used any longer, to save power */
PMC->CKGR_MOR = CKGR_MOR_KEY_PASSWD
| CKGR_MOR_MOSCSEL
| CKGR_MOR_MOSCXTST(0xFFu)
| CKGR_MOR_MOSCXTEN;
/* Turn off RC OSC, not used any longer, to save power */
PMC->CKGR_MOR = CKGR_MOR_KEY_PASSWD
| CKGR_MOR_MOSCSEL
| CKGR_MOR_MOSCXTST(0xFFu)
| CKGR_MOR_MOSCXTEN;
/* Wait for RC OSC to be turned off */
while (PMC->PMC_SR & PMC_SR_MOSCRCS) {
;
}
/* Wait for RC OSC to be turned off */
while (PMC->PMC_SR & PMC_SR_MOSCRCS) {
;
}
#ifdef CONFIG_SOC_ATMEL_SAME70_WAIT_MODE