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SAMV7: Add some conditional logic to handle the case where the board has no 32.768KHz crystal installed

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This commit is contained in:
Gregory Nutt 2015-11-30 15:21:25 -06:00
parent e421258808
commit 5367c5993c
1 changed files with 6 additions and 1 deletions
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7
arch/arm/src/samv7/sam_clockconfig.c
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@ -131,7 +131,11 @@ static inline void sam_wdtsetup(void)
static inline void sam_supcsetup(void)
{
/* Check if the 32-kHz is already selected */
#ifdef BOARD_HAVE_SLOWXTAL
/* Check if the 32-kHz is already selected. The slow clock defaults to
* the RC oscillator, but the software can enable the crystal oscillator
* and select it as the slow clock source.
*/
if ((getreg32(SAM_SUPC_SR) & SUPC_SR_OSCSEL) == 0)
{
@ -142,6 +146,7 @@ static inline void sam_supcsetup(void)
(getreg32(SAM_SUPC_SR) & SUPC_SR_OSCSEL) == 0 && delay < UINT32_MAX;
delay++);
}
#endif
}
/****************************************************************************