drivers: usb: ohci-at91: clean up the PLLB code

Due to introducing the new PLLB clock handle functions,
use these functions to clean up the PLLB enable/disable code.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: Andreas Bießmann <andreas.devel@googlemail.com>
Tested-by: Heiko Schocher <hs@denx.de>

drivers/usb/host/ohci-at91.c

@@ -9,20 +9,14 @@
 
 #if defined(CONFIG_USB_OHCI_NEW) && defined(CONFIG_SYS_USB_OHCI_CPU_INIT)
 
-#include <asm/io.h>
-#include <asm/arch/hardware.h>
-#include <asm/arch/at91_pmc.h>
 #include <asm/arch/clk.h>
 
 int usb_cpu_init(void)
 {
-	at91_pmc_t *pmc	= (at91_pmc_t *)ATMEL_BASE_PMC;
-
 #ifdef CONFIG_USB_ATMEL_CLK_SEL_PLLB
-	/* Enable PLLB */
-	writel(get_pllb_init(), &pmc->pllbr);
-	while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != AT91_PMC_LOCKB)
-		;
+	if (at91_pllb_clk_enable(get_pllb_init()))
+		return -1;
+
 #ifdef CONFIG_AT91SAM9N12
 	at91_usb_clk_init(AT91_PMC_USBS_USB_PLLB | AT91_PMC_USB_DIV_2);
 #endif
@@ -45,8 +39,6 @@ int usb_cpu_init(void)
 
 int usb_cpu_stop(void)
 {
-	at91_pmc_t *pmc	= (at91_pmc_t *)ATMEL_BASE_PMC;
-
 	at91_periph_clk_disable(ATMEL_ID_UHP);
 
 	at91_system_clk_disable(ATMEL_PMC_UHP);
@@ -58,10 +50,10 @@ int usb_cpu_stop(void)
 #ifdef CONFIG_AT91SAM9N12
 	at91_usb_clk_init(0);
 #endif
-	/* Disable PLLB */
-	writel(0, &pmc->pllbr);
-	while ((readl(&pmc->sr) & AT91_PMC_LOCKB) != 0)
-		;
+
+	if (at91_pllb_clk_disable())
+		return -1;
+
 #elif defined(CONFIG_USB_ATMEL_CLK_SEL_UPLL)
 	if (at91_upll_clk_disable())
 		return -1;