LXR linux/drivers/clk/meson/parm.h

   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
  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