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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_H8#define __MESON_PARM_H9 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 24struct parm {25 u16 reg_off;26 u8 shift;27 u8 width;28};29 30static inline unsigned int meson_parm_read(struct regmap *map, struct parm *p)31{32 unsigned int val;33 34 regmap_read(map, p->reg_off, &val);35 return PARM_GET(p->width, p->shift, val);36}37 38static inline void meson_parm_write(struct regmap *map, struct parm *p,39 unsigned int val)40{41 regmap_update_bits(map, p->reg_off, SETPMASK(p->width, p->shift),42 val << p->shift);43}44 45#endif /* __MESON_PARM_H */46 47