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author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
commit | 57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch) | |
tree | 5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/blackfin/include/mach-common/pll.h |
Initial import
Diffstat (limited to 'arch/blackfin/include/mach-common/pll.h')
-rw-r--r-- | arch/blackfin/include/mach-common/pll.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/arch/blackfin/include/mach-common/pll.h b/arch/blackfin/include/mach-common/pll.h new file mode 100644 index 000000000..382178b36 --- /dev/null +++ b/arch/blackfin/include/mach-common/pll.h @@ -0,0 +1,86 @@ +/* + * Copyright 2005-2010 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#ifndef _MACH_COMMON_PLL_H +#define _MACH_COMMON_PLL_H + +#ifndef __ASSEMBLY__ + +#include <asm/blackfin.h> +#include <asm/irqflags.h> + +#ifndef bfin_iwr_restore +static inline void +bfin_iwr_restore(unsigned long iwr0, unsigned long iwr1, unsigned long iwr2) +{ +#ifdef SIC_IWR + bfin_write_SIC_IWR(iwr0); +#else + bfin_write_SIC_IWR0(iwr0); +# ifdef SIC_IWR1 + bfin_write_SIC_IWR1(iwr1); +# endif +# ifdef SIC_IWR2 + bfin_write_SIC_IWR2(iwr2); +# endif +#endif +} +#endif + +#ifndef bfin_iwr_save +static inline void +bfin_iwr_save(unsigned long niwr0, unsigned long niwr1, unsigned long niwr2, + unsigned long *iwr0, unsigned long *iwr1, unsigned long *iwr2) +{ +#ifdef SIC_IWR + *iwr0 = bfin_read_SIC_IWR(); +#else + *iwr0 = bfin_read_SIC_IWR0(); +# ifdef SIC_IWR1 + *iwr1 = bfin_read_SIC_IWR1(); +# endif +# ifdef SIC_IWR2 + *iwr2 = bfin_read_SIC_IWR2(); +# endif +#endif + bfin_iwr_restore(niwr0, niwr1, niwr2); +} +#endif + +static inline void _bfin_write_pll_relock(u32 addr, unsigned int val) +{ + unsigned long flags, iwr0, iwr1, iwr2; + + if (val == bfin_read_PLL_CTL()) + return; + + flags = hard_local_irq_save(); + /* Enable the PLL Wakeup bit in SIC IWR */ + bfin_iwr_save(IWR_ENABLE(0), 0, 0, &iwr0, &iwr1, &iwr2); + + bfin_write16(addr, val); + SSYNC(); + asm("IDLE;"); + + bfin_iwr_restore(iwr0, iwr1, iwr2); + hard_local_irq_restore(flags); +} + +/* Writing to PLL_CTL initiates a PLL relock sequence */ +static inline void bfin_write_PLL_CTL(unsigned int val) +{ + _bfin_write_pll_relock(PLL_CTL, val); +} + +/* Writing to VR_CTL initiates a PLL relock sequence */ +static inline void bfin_write_VR_CTL(unsigned int val) +{ + _bfin_write_pll_relock(VR_CTL, val); +} + +#endif + +#endif |