1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* |
3 | * Copyright (c) 2015 Endless Mobile, Inc. |
4 | * Author: Carlo Caione <carlo@endlessm.com> |
5 | */ |
6 | |
7 | #ifndef __MESON_PARM_H |
8 | #define __MESON_PARM_H |
9 | |
10 | #include <linux/bits.h> |
11 | #include <linux/regmap.h> |
12 | |
13 | #define PMASK(width) GENMASK(width - 1, 0) |
14 | #define SETPMASK(width, shift) GENMASK(shift + width - 1, shift) |
15 | #define CLRPMASK(width, shift) (~SETPMASK(width, shift)) |
16 | |
17 | #define PARM_GET(width, shift, reg) \ |
18 | (((reg) & SETPMASK(width, shift)) >> (shift)) |
19 | #define PARM_SET(width, shift, reg, val) \ |
20 | (((reg) & CLRPMASK(width, shift)) | ((val) << (shift))) |
21 | |
22 | #define MESON_PARM_APPLICABLE(p) (!!((p)->width)) |
23 | |
24 | struct parm { |
25 | u16 reg_off; |
26 | u8 shift; |
27 | u8 width; |
28 | }; |
29 | |
30 | static inline unsigned int meson_parm_read(struct regmap *map, struct parm *p) |
31 | { |
32 | unsigned int val; |
33 | |
34 | regmap_read(map, reg: p->reg_off, val: &val); |
35 | return PARM_GET(p->width, p->shift, val); |
36 | } |
37 | |
38 | static inline void meson_parm_write(struct regmap *map, struct parm *p, |
39 | unsigned int val) |
40 | { |
41 | regmap_update_bits(map, reg: p->reg_off, SETPMASK(p->width, p->shift), |
42 | val: val << p->shift); |
43 | } |
44 | |
45 | #endif /* __MESON_PARM_H */ |
46 | |
47 | |