2 * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
3 * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
4 * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public
8 * License as published by the Free Software Foundation;
9 * either version 2, or (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
13 * the implied warranty of MERCHANTABILITY or FITNESS FOR
14 * A PARTICULAR PURPOSE.See the GNU General Public License
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
20 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 * clock and PLL management functions
26 #ifndef __VIA_CLOCK_H__
27 #define __VIA_CLOCK_H__
29 #include <linux/types.h>
35 VIA_CLKSRC_DVP1TVCLKR,
40 struct via_pll_config {
47 void (*set_primary_clock_state)(u8 state);
48 void (*set_primary_clock_source)(enum via_clksrc src, bool use_pll);
49 void (*set_primary_pll_state)(u8 state);
50 void (*set_primary_pll)(struct via_pll_config config);
52 void (*set_secondary_clock_state)(u8 state);
53 void (*set_secondary_clock_source)(enum via_clksrc src, bool use_pll);
54 void (*set_secondary_pll_state)(u8 state);
55 void (*set_secondary_pll)(struct via_pll_config config);
57 void (*set_engine_pll_state)(u8 state);
58 void (*set_engine_pll)(struct via_pll_config config);
62 static inline u32 get_pll_internal_frequency(u32 ref_freq,
63 struct via_pll_config pll)
65 return ref_freq / pll.divisor * pll.multiplier;
68 static inline u32 get_pll_output_frequency(u32 ref_freq,
69 struct via_pll_config pll)
71 return get_pll_internal_frequency(ref_freq, pll) >> pll.rshift;
74 void via_clock_init(struct via_clock *clock, int gfx_chip);
76 #endif /* __VIA_CLOCK_H__ */