diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-at91/spl_atmel.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm/mach-at91/spl_atmel.c b/arch/arm/mach-at91/spl_atmel.c index ef745c9..85290be 100644 --- a/arch/arm/mach-at91/spl_atmel.c +++ b/arch/arm/mach-at91/spl_atmel.c @@ -44,7 +44,15 @@ static void switch_to_main_crystal_osc(void) #endif tmp = readl(&pmc->mor); +/* + * some boards have an external oscillator with driving. + * in this case we need to disable the internal SoC driving (bypass mode) + */ +#if defined(CONFIG_SPL_AT91_MCK_BYPASS) + tmp |= AT91_PMC_MOR_OSCBYPASS; +#else tmp &= ~AT91_PMC_MOR_OSCBYPASS; +#endif tmp &= ~AT91_PMC_MOR_KEY(0xff); tmp |= AT91_PMC_MOR_KEY(0x37); writel(tmp, &pmc->mor); |