diff options
Diffstat (limited to 'arch/arm/plat-s3c64xx/include/plat/pll.h')
-rw-r--r-- | arch/arm/plat-s3c64xx/include/plat/pll.h | 74 |
1 files changed, 0 insertions, 74 deletions
diff --git a/arch/arm/plat-s3c64xx/include/plat/pll.h b/arch/arm/plat-s3c64xx/include/plat/pll.h deleted file mode 100644 index 90bbd72fdc4..00000000000 --- a/arch/arm/plat-s3c64xx/include/plat/pll.h +++ /dev/null @@ -1,74 +0,0 @@ -/* 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> - -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; -} - -#define S3C6400_EPLL_MDIV_MASK ((1 << (23-16)) - 1) -#define S3C6400_EPLL_PDIV_MASK ((1 << (13-8)) - 1) -#define S3C6400_EPLL_SDIV_MASK ((1 << (2-0)) - 1) -#define S3C6400_EPLL_MDIV_SHIFT (16) -#define S3C6400_EPLL_PDIV_SHIFT (8) -#define S3C6400_EPLL_SDIV_SHIFT (0) -#define S3C6400_EPLL_KDIV_MASK (0xffff) - -static inline unsigned long s3c6400_get_epll(unsigned long baseclk) -{ - unsigned long result; - u32 epll0 = __raw_readl(S3C_EPLL_CON0); - u32 epll1 = __raw_readl(S3C_EPLL_CON1); - u32 mdiv, pdiv, sdiv, kdiv; - u64 tmp; - - mdiv = (epll0 >> S3C6400_EPLL_MDIV_SHIFT) & S3C6400_EPLL_MDIV_MASK; - pdiv = (epll0 >> S3C6400_EPLL_PDIV_SHIFT) & S3C6400_EPLL_PDIV_MASK; - sdiv = (epll0 >> S3C6400_EPLL_SDIV_SHIFT) & S3C6400_EPLL_SDIV_MASK; - kdiv = epll1 & S3C6400_EPLL_KDIV_MASK; - - /* We need to multiple baseclk by mdiv (the integer part) and kdiv - * which is in 2^16ths, so shift mdiv up (does not overflow) and - * add kdiv before multiplying. The use of tmp is to avoid any - * overflows before shifting bac down into result when multipling - * by the mdiv and kdiv pair. - */ - - tmp = baseclk; - tmp *= (mdiv << 16) + kdiv; - do_div(tmp, (pdiv << sdiv)); - result = tmp >> 16; - - return result; -} |