diff --git a/board/siemens/smartweb/smartweb.c b/board/siemens/smartweb/smartweb.c
index e7ee65c..47a60a7 100644
--- a/board/siemens/smartweb/smartweb.c
+++ b/board/siemens/smartweb/smartweb.c
@@ -115,12 +115,8 @@
 
 void at91_udp_hw_init(void)
 {
-	at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
-
 	/* Enable PLLB */
-	writel(get_pllb_init(), &pmc->pllbr);
-	while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != AT91_PMC_LOCKB)
-		;
+	at91_pllb_clk_enable(get_pllb_init());
 
 	/* Enable UDPCK clock, MCK is enabled in at91_clock_init() */
 	at91_periph_clk_enable(ATMEL_ID_UDP);
diff --git a/board/siemens/taurus/taurus.c b/board/siemens/taurus/taurus.c
index 9374064..b0385d8 100644
--- a/board/siemens/taurus/taurus.c
+++ b/board/siemens/taurus/taurus.c
@@ -289,12 +289,8 @@
 
 void at91_udp_hw_init(void)
 {
-	at91_pmc_t *pmc = (at91_pmc_t *)ATMEL_BASE_PMC;
-
 	/* Enable PLLB */
-	writel(get_pllb_init(), &pmc->pllbr);
-	while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != AT91_PMC_LOCKB)
-		;
+	at91_pllb_clk_enable(get_pllb_init());
 
 	/* Enable UDPCK clock, MCK is enabled in at91_clock_init() */
 	at91_periph_clk_enable(ATMEL_ID_UDP);