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kernel add
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/*
* Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
* Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
* Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation;
* either version 2, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
* the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE.See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/*
* clock and PLL management functions
*/
#ifndef __VIA_CLOCK_H__
#define __VIA_CLOCK_H__
#include <linux/types.h>
enum via_clksrc {
VIA_CLKSRC_X1 = 0,
VIA_CLKSRC_TVX1,
VIA_CLKSRC_TVPLL,
VIA_CLKSRC_DVP1TVCLKR,
VIA_CLKSRC_CAP0,
VIA_CLKSRC_CAP1,
};
struct via_pll_config {
u16 multiplier;
u8 divisor;
u8 rshift;
};
struct via_clock {
void (*set_primary_clock_state)(u8 state);
void (*set_primary_clock_source)(enum via_clksrc src, bool use_pll);
void (*set_primary_pll_state)(u8 state);
void (*set_primary_pll)(struct via_pll_config config);
void (*set_secondary_clock_state)(u8 state);
void (*set_secondary_clock_source)(enum via_clksrc src, bool use_pll);
void (*set_secondary_pll_state)(u8 state);
void (*set_secondary_pll)(struct via_pll_config config);
void (*set_engine_pll_state)(u8 state);
void (*set_engine_pll)(struct via_pll_config config);
};
static inline u32 get_pll_internal_frequency(u32 ref_freq,
struct via_pll_config pll)
{
return ref_freq / pll.divisor * pll.multiplier;
}
static inline u32 get_pll_output_frequency(u32 ref_freq,
struct via_pll_config pll)
{
return get_pll_internal_frequency(ref_freq, pll) >> pll.rshift;
}
void via_clock_init(struct via_clock *clock, int gfx_chip);
#endif /* __VIA_CLOCK_H__ */
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