1/* arch/arm/plat-s3c64xx/include/plat/pll.h 2 * 3 * Copyright 2008 Openmoko, Inc. 4 * Copyright 2008 Simtec Electronics 5 * Ben Dooks <ben@simtec.co.uk> 6 * http://armlinux.simtec.co.uk/ 7 * 8 * S3C64XX PLL code 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13*/ 14 15#define S3C6400_PLL_MDIV_MASK ((1 << (25-16+1)) - 1) 16#define S3C6400_PLL_PDIV_MASK ((1 << (13-8+1)) - 1) 17#define S3C6400_PLL_SDIV_MASK ((1 << (2-0+1)) - 1) 18#define S3C6400_PLL_MDIV_SHIFT (16) 19#define S3C6400_PLL_PDIV_SHIFT (8) 20#define S3C6400_PLL_SDIV_SHIFT (0) 21 22#include <asm/div64.h> 23#include <plat/pll6553x.h> 24 25static inline unsigned long s3c6400_get_pll(unsigned long baseclk, 26 u32 pllcon) 27{ 28 u32 mdiv, pdiv, sdiv; 29 u64 fvco = baseclk; 30 31 mdiv = (pllcon >> S3C6400_PLL_MDIV_SHIFT) & S3C6400_PLL_MDIV_MASK; 32 pdiv = (pllcon >> S3C6400_PLL_PDIV_SHIFT) & S3C6400_PLL_PDIV_MASK; 33 sdiv = (pllcon >> S3C6400_PLL_SDIV_SHIFT) & S3C6400_PLL_SDIV_MASK; 34 35 fvco *= mdiv; 36 do_div(fvco, (pdiv << sdiv)); 37 38 return (unsigned long)fvco; 39} 40 41static inline unsigned long s3c6400_get_epll(unsigned long baseclk) 42{ 43 return s3c_get_pll6553x(baseclk, __raw_readl(S3C_EPLL_CON0), 44 __raw_readl(S3C_EPLL_CON1)); 45} 46