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| author | Bo Shen <voice.shen@atmel.com> | 2014-10-24 16:13:25 +0800 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2014-11-17 08:47:15 -0500 |
| commit | a5f35d63f2ec0f95162da924d346922d5888aa38 (patch) | |
| tree | 37808e437cc7e708c9825ee31c21992cc86f405e /arch | |
| parent | 59158ba39db9463feddefa54c243da07987b4a09 (diff) | |
| download | u-boot-imx-a5f35d63f2ec0f95162da924d346922d5888aa38.zip u-boot-imx-a5f35d63f2ec0f95162da924d346922d5888aa38.tar.gz u-boot-imx-a5f35d63f2ec0f95162da924d346922d5888aa38.tar.bz2 | |
ARM: atmel: spl: make initialization more stable
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>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/cpu/at91-common/spl.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/cpu/at91-common/spl.c b/arch/arm/cpu/at91-common/spl.c index 674a470..57fb041 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); |