62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
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* Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
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* Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
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*/
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/*
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* clock and PLL management functions
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*/
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#ifndef __VIA_CLOCK_H__
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#define __VIA_CLOCK_H__
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#include <linux/types.h>
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enum via_clksrc {
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VIA_CLKSRC_X1 = 0,
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VIA_CLKSRC_TVX1,
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VIA_CLKSRC_TVPLL,
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VIA_CLKSRC_DVP1TVCLKR,
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VIA_CLKSRC_CAP0,
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VIA_CLKSRC_CAP1,
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};
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struct via_pll_config {
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u16 multiplier;
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u8 divisor;
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u8 rshift;
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};
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struct via_clock {
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void (*set_primary_clock_state)(u8 state);
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void (*set_primary_clock_source)(enum via_clksrc src, bool use_pll);
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void (*set_primary_pll_state)(u8 state);
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void (*set_primary_pll)(struct via_pll_config config);
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void (*set_secondary_clock_state)(u8 state);
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void (*set_secondary_clock_source)(enum via_clksrc src, bool use_pll);
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void (*set_secondary_pll_state)(u8 state);
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void (*set_secondary_pll)(struct via_pll_config config);
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void (*set_engine_pll_state)(u8 state);
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void (*set_engine_pll)(struct via_pll_config config);
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};
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static inline u32 get_pll_internal_frequency(u32 ref_freq,
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struct via_pll_config pll)
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{
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return ref_freq / pll.divisor * pll.multiplier;
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}
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static inline u32 get_pll_output_frequency(u32 ref_freq,
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struct via_pll_config pll)
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{
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return get_pll_internal_frequency(ref_freq, pll) >> pll.rshift;
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}
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void via_clock_init(struct via_clock *clock, int gfx_chip);
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#endif /* __VIA_CLOCK_H__ */
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