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/* 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;
}
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