on a at91sam9g15 basd board I need another MOR register
init as common for at91 based boards. Changes:
- set AT91_PMC_MOR_KEY to 0x37, without this writting has
no effect to tthis register.
- AT91_PMC_MOR_OSCOUNT to 0
- set AT91_PMC_MOR_MOSCEN and AT91_PMC_MOR_MOSCSEL
Signed-off-by: Heiko Schocher <h...@denx.de>
---
I post this as a RFC patch, because this settings may
break other boards ... so if this is not a valid common
setting, I propose to make this setting board configurable
through a weak function ...
arch/arm/mach-at91/spl_at91.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/arch/arm/mach-at91/spl_at91.c b/arch/arm/mach-at91/spl_at91.c
index cc3341a..4d8ed26 100644
--- a/arch/arm/mach-at91/spl_at91.c
+++ b/arch/arm/mach-at91/spl_at91.c
@@ -31,13 +31,20 @@ static void enable_ext_reset(void)
void lowlevel_clock_init(void)
{
struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+ u32 tmp;
if (!(readl(&pmc->sr) & AT91_PMC_MOSCS)) {
- /* Enable Main Oscillator */
- writel(AT91_PMC_MOSCS | (0x40 << 8), &pmc->mor);
+ tmp = readl(&pmc->mor);
+ tmp &= ~AT91_PMC_MOR_OSCOUNT(0xff);
+ tmp &= ~AT91_PMC_MOR_KEY(0xff);
+ tmp |= AT91_PMC_MOR_MOSCEN;
+ tmp |= AT91_PMC_MOR_MOSCSEL;
+ tmp |= AT91_PMC_MOR_OSCOUNT(0);
+ tmp |= AT91_PMC_MOR_KEY(0x37);
+ writel(tmp, &pmc->mor);
/* Wait until Main Oscillator is stable */
- while (!(readl(&pmc->sr) & AT91_PMC_MOSCS))
+ while (!(readl(&pmc->sr) & AT91_PMC_IXR_MOSCS))
;
}
--
2.5.5
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