| /* arch/arm/plat-s5pc1xx/include/plat/pll.h |
| * |
| * Copyright 2009 Samsung Electronics Co. |
| * Byungho Min <bhmin@samsung.com> |
| * |
| * S5PC1XX PLL code |
| * |
| * Based on plat-s3c64xx/include/plat/pll.h |
| * |
| * 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 S5P_PLL_MDIV_MASK ((1 << (25-16+1)) - 1) |
| #define S5P_PLL_PDIV_MASK ((1 << (13-8+1)) - 1) |
| #define S5P_PLL_SDIV_MASK ((1 << (2-0+1)) - 1) |
| #define S5P_PLL_MDIV_SHIFT (16) |
| #define S5P_PLL_PDIV_SHIFT (8) |
| #define S5P_PLL_SDIV_SHIFT (0) |
| |
| #include <asm/div64.h> |
| |
| static inline unsigned long s5pc1xx_get_pll(unsigned long baseclk, |
| u32 pllcon) |
| { |
| u32 mdiv, pdiv, sdiv; |
| u64 fvco = baseclk; |
| |
| mdiv = (pllcon >> S5P_PLL_MDIV_SHIFT) & S5P_PLL_MDIV_MASK; |
| pdiv = (pllcon >> S5P_PLL_PDIV_SHIFT) & S5P_PLL_PDIV_MASK; |
| sdiv = (pllcon >> S5P_PLL_SDIV_SHIFT) & S5P_PLL_SDIV_MASK; |
| |
| fvco *= mdiv; |
| do_div(fvco, (pdiv << sdiv)); |
| |
| return (unsigned long)fvco; |
| } |
