+
+int at91_pllb_clk_enable(u32 pllbr)
+{
+ struct at91_pmc *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
+ ulong start_time, tmp_time;
+
+ start_time = get_timer(0);
+ writel(pllbr, &pmc->pllbr);
+ while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != AT91_PMC_LOCKB) {
+ tmp_time = get_timer(0);
+ if ((tmp_time - start_time) > EN_PLLB_TIMEOUT) {
+ printf("ERROR: failed to enable PLLB\n");
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+int at91_pllb_clk_disable(void)
+{
+ struct at91_pmc *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
+ ulong start_time, tmp_time;
+
+ start_time = get_timer(0);
+ writel(0, &pmc->pllbr);
+ while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != 0) {
+ tmp_time = get_timer(0);
+ if ((tmp_time - start_time) > EN_PLLB_TIMEOUT) {
+ printf("ERROR: failed to disable PLLB\n");
+ return -1;
+ }
+ }
+
+ return 0;
+}