diff options
Diffstat (limited to 'arch/arm/mach-s3c64xx/include/mach/pll.h')
| -rw-r--r-- | arch/arm/mach-s3c64xx/include/mach/pll.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c64xx/include/mach/pll.h b/arch/arm/mach-s3c64xx/include/mach/pll.h new file mode 100644 index 00000000..5ef0bb69 --- /dev/null +++ b/arch/arm/mach-s3c64xx/include/mach/pll.h @@ -0,0 +1,45 @@ +/* arch/arm/plat-s3c64xx/include/plat/pll.h + * + * Copyright 2008 Openmoko, Inc. + * Copyright 2008 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * http://armlinux.simtec.co.uk/ + * + * S3C64XX PLL code + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#define S3C6400_PLL_MDIV_MASK ((1 << (25-16+1)) - 1) +#define S3C6400_PLL_PDIV_MASK ((1 << (13-8+1)) - 1) +#define S3C6400_PLL_SDIV_MASK ((1 << (2-0+1)) - 1) +#define S3C6400_PLL_MDIV_SHIFT (16) +#define S3C6400_PLL_PDIV_SHIFT (8) +#define S3C6400_PLL_SDIV_SHIFT (0) + +#include <asm/div64.h> +#include <plat/pll6553x.h> + +static inline unsigned long s3c6400_get_pll(unsigned long baseclk, + u32 pllcon) +{ + u32 mdiv, pdiv, sdiv; + u64 fvco = baseclk; + + mdiv = (pllcon >> S3C6400_PLL_MDIV_SHIFT) & S3C6400_PLL_MDIV_MASK; + pdiv = (pllcon >> S3C6400_PLL_PDIV_SHIFT) & S3C6400_PLL_PDIV_MASK; + sdiv = (pllcon >> S3C6400_PLL_SDIV_SHIFT) & S3C6400_PLL_SDIV_MASK; + + fvco *= mdiv; + do_div(fvco, (pdiv << sdiv)); + + return (unsigned long)fvco; +} + +static inline unsigned long s3c6400_get_epll(unsigned long baseclk) +{ + return s3c_get_pll6553x(baseclk, __raw_readl(S3C_EPLL_CON0), + __raw_readl(S3C_EPLL_CON1)); +} |