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/*
* Copyright 2007-2008 Analog Devices Inc.
*
* Licensed under the GPL-2 or later.
*/
#ifndef _MACH_PLL_H
#define _MACH_PLL_H
#include <asm/blackfin.h>
#include <asm/irqflags.h>
/* Writing to PLL_CTL initiates a PLL relock sequence. */
static __inline__ void bfin_write_PLL_CTL(unsigned int val)
{
unsigned long flags, iwr0, iwr1, iwr2;
if (val == bfin_read_PLL_CTL())
return;
local_irq_save_hw(flags);
/* Enable the PLL Wakeup bit in SIC IWR */
iwr0 = bfin_read32(SIC_IWR0);
iwr1 = bfin_read32(SIC_IWR1);
iwr2 = bfin_read32(SIC_IWR2);
/* Only allow PPL Wakeup) */
bfin_write32(SIC_IWR0, IWR_ENABLE(0));
bfin_write32(SIC_IWR1, 0);
bfin_write32(SIC_IWR2, 0);
bfin_write16(PLL_CTL, val);
SSYNC();
asm("IDLE;");
bfin_write32(SIC_IWR0, iwr0);
bfin_write32(SIC_IWR1, iwr1);
bfin_write32(SIC_IWR2, iwr2);
local_irq_restore_hw(flags);
}
/* Writing to VR_CTL initiates a PLL relock sequence. */
static __inline__ void bfin_write_VR_CTL(unsigned int val)
{
unsigned long flags, iwr0, iwr1, iwr2;
if (val == bfin_read_VR_CTL())
return;
local_irq_save_hw(flags);
/* Enable the PLL Wakeup bit in SIC IWR */
iwr0 = bfin_read32(SIC_IWR0);
iwr1 = bfin_read32(SIC_IWR1);
iwr2 = bfin_read32(SIC_IWR2);
/* Only allow PPL Wakeup) */
bfin_write32(SIC_IWR0, IWR_ENABLE(0));
bfin_write32(SIC_IWR1, 0);
bfin_write32(SIC_IWR2, 0);
bfin_write16(VR_CTL, val);
SSYNC();
asm("IDLE;");
bfin_write32(SIC_IWR0, iwr0);
bfin_write32(SIC_IWR1, iwr1);
bfin_write32(SIC_IWR2, iwr2);
local_irq_restore_hw(flags);
}
#endif /* _MACH_PLL_H */
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