mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-23 09:56:00 +00:00
39 lines
1.0 KiB
C
39 lines
1.0 KiB
C
|
/* 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;
|
||
|
|
}
|