1/* SPDX-License-Identifier: GPL-2.0+ */
2/*
3 * Copyright (C) 2023 Loongson Technology Corporation Limited
4 */
5
6#ifndef __LSDC_GFXPLL_H__
7#define __LSDC_GFXPLL_H__
8
9#include <drm/drm_device.h>
10
11struct loongson_gfxpll;
12
13struct loongson_gfxpll_parms {
14	unsigned int ref_clock;
15	unsigned int div_ref;
16	unsigned int loopc;
17	unsigned int div_out_dc;
18	unsigned int div_out_gmc;
19	unsigned int div_out_gpu;
20};
21
22struct loongson_gfxpll_funcs {
23	int (*init)(struct loongson_gfxpll * const this);
24
25	int (*update)(struct loongson_gfxpll * const this,
26		      struct loongson_gfxpll_parms const *pin);
27
28	void (*get_rates)(struct loongson_gfxpll * const this,
29			  unsigned int *dc, unsigned int *gmc, unsigned int *gpu);
30
31	void (*print)(struct loongson_gfxpll * const this,
32		      struct drm_printer *printer, bool verbose);
33};
34
35struct loongson_gfxpll {
36	struct drm_device *ddev;
37	void __iomem *mmio;
38
39	/* PLL register offset */
40	u32 reg_base;
41	/* PLL register size in bytes */
42	u32 reg_size;
43
44	const struct loongson_gfxpll_funcs *funcs;
45
46	struct loongson_gfxpll_parms parms;
47};
48
49int loongson_gfxpll_create(struct drm_device *ddev,
50			   struct loongson_gfxpll **ppout);
51
52#endif
53