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@@ -18,6 +18,8 @@
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# error You need to define CONFIG_AT91FAMILY in your board config!
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#endif
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+#define EN_PLLB_TIMEOUT 500
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+
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DECLARE_GLOBAL_DATA_PTR;
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static unsigned long at91_css_to_rate(unsigned long css)
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@@ -242,3 +244,39 @@ void at91_mck_init(u32 mckr)
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while (!(readl(&pmc->sr) & AT91_PMC_MCKRDY))
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;
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}
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+
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+int at91_pllb_clk_enable(u32 pllbr)
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+{
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+ struct at91_pmc *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
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+ ulong start_time, tmp_time;
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+
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+ start_time = get_timer(0);
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+ writel(pllbr, &pmc->pllbr);
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+ while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != AT91_PMC_LOCKB) {
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+ tmp_time = get_timer(0);
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+ if ((tmp_time - start_time) > EN_PLLB_TIMEOUT) {
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+ printf("ERROR: failed to enable PLLB\n");
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+ return -1;
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+ }
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+ }
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+
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+ return 0;
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+}
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+
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+int at91_pllb_clk_disable(void)
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+{
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+ struct at91_pmc *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
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+ ulong start_time, tmp_time;
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+
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+ start_time = get_timer(0);
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+ writel(0, &pmc->pllbr);
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+ while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != 0) {
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+ tmp_time = get_timer(0);
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+ if ((tmp_time - start_time) > EN_PLLB_TIMEOUT) {
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+ printf("ERROR: failed to disable PLLB\n");
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+ return -1;
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+ }
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+ }
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+
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+ return 0;
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+}
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