1 files changed, 60 insertions, 0 deletions
diff --git a/arch/arm/cpu/arm926ejs/at91/clock.c b/arch/arm/cpu/arm926ejs/at91/clock.c
index 31315b58e4..f363982d03 100644
--- a/arch/arm/cpu/arm926ejs/at91/clock.c
+++ b/arch/arm/cpu/arm926ejs/at91/clock.c
@@ -187,3 +187,63 @@ int at91_clock_init(unsigned long main_clock)
 
 	return 0;
 }
+
+#if !defined(AT91_PLL_LOCK_TIMEOUT)
+#define AT91_PLL_LOCK_TIMEOUT	1000000
+#endif
+
+void at91_plla_init(u32 pllar)
+{
+	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+	int timeout = AT91_PLL_LOCK_TIMEOUT;
+
+	writel(pllar, &pmc->pllar);
+	while (!(readl(&pmc->sr) & (AT91_PMC_LOCKA | AT91_PMC_MCKRDY))) {
+		timeout--;
+		if (timeout == 0)
+			break;
+	}
+}
+void at91_pllb_init(u32 pllbr)
+{
+	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+	int timeout = AT91_PLL_LOCK_TIMEOUT;
+
+	writel(pllbr, &pmc->pllbr);
+	while (!(readl(&pmc->sr) & (AT91_PMC_LOCKB | AT91_PMC_MCKRDY))) {
+		timeout--;
+		if (timeout == 0)
+			break;
+	}
+}
+
+void at91_mck_init(u32 mckr)
+{
+	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+	int timeout = AT91_PLL_LOCK_TIMEOUT;
+	u32 tmp;
+
+	tmp = readl(&pmc->mckr);
+	tmp &= ~(AT91_PMC_MCKR_PRES_MASK |
+		 AT91_PMC_MCKR_MDIV_MASK |
+		 AT91_PMC_MCKR_PLLADIV_MASK |
+		 AT91_PMC_MCKR_CSS_MASK);
+	tmp |= mckr & (AT91_PMC_MCKR_PRES_MASK |
+		       AT91_PMC_MCKR_MDIV_MASK |
+		       AT91_PMC_MCKR_PLLADIV_MASK |
+		       AT91_PMC_MCKR_CSS_MASK);
+	writel(tmp, &pmc->mckr);
+
+	while (!(readl(&pmc->sr) & AT91_PMC_MCKRDY)) {
+		timeout--;
+		if (timeout == 0)
+			break;
+	}
+}
+
+void at91_periph_clk_enable(int id)
+{
+	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+
+	writel(1 << id, &pmc->pcer);
+}