| Message ID | 1414138406-4933-1-git-send-email-voice.shen@atmel.com |
|---|---|
| State | Accepted, archived |
| Delegated to: | Andreas Bießmann |
| Headers | show |
Dear Bo Shen, Bo Shen <voice.shen@atmel.com> writes: >We need to make sure the main clock ready field in MCFR is set >after switch to main crystal oscillator. > >Signed-off-by: Bo Shen <voice.shen@atmel.com> >--- > > arch/arm/cpu/at91-common/spl.c | 4 ++++ > 1 file changed, 4 insertions(+) applied to u-boot-atmel/master, thanks! Best regards, Andreas Bießmann
diff --git a/arch/arm/cpu/at91-common/spl.c b/arch/arm/cpu/at91-common/spl.c index cbb5a52..1d7770e 100644 --- a/arch/arm/cpu/at91-common/spl.c +++ b/arch/arm/cpu/at91-common/spl.c @@ -50,6 +50,10 @@ static void switch_to_main_crystal_osc(void) while (!(readl(&pmc->sr) & AT91_PMC_IXR_MOSCSELS)) ; + /* Wait until MAINRDY field is set to make sure main clock is stable */ + while (!(readl(&pmc->mcfr) & AT91_PMC_MAINRDY)) + ; + tmp = readl(&pmc->mor); tmp &= ~AT91_PMC_MOR_MOSCRCEN; tmp &= ~AT91_PMC_MOR_KEY(0xff);
We need to make sure the main clock ready field in MCFR is set after switch to main crystal oscillator. Signed-off-by: Bo Shen <voice.shen@atmel.com> --- arch/arm/cpu/at91-common/spl.c | 4 ++++ 1 file changed, 4 insertions(+)