| /* 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)); |
| } |
