Contributors: 4
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Mark Brown |
232 |
67.84% |
1 |
16.67% |
| Xiubo Li |
66 |
19.30% |
3 |
50.00% |
| Andrew F. Davis |
39 |
11.40% |
1 |
16.67% |
| Alexander Stein |
5 |
1.46% |
1 |
16.67% |
| Total |
342 |
|
6 |
|
/*
* Register cache access API - flat caching support
*
* Copyright 2012 Wolfson Microelectronics plc
*
* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/device.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include "internal.h"
static inline unsigned int regcache_flat_get_index(const struct regmap *map,
unsigned int reg)
{
return regcache_get_index_by_order(map, reg);
}
static int regcache_flat_init(struct regmap *map)
{
int i;
unsigned int *cache;
if (!map || map->reg_stride_order < 0 || !map->max_register)
return -EINVAL;
map->cache = kcalloc(regcache_flat_get_index(map, map->max_register)
+ 1, sizeof(unsigned int), GFP_KERNEL);
if (!map->cache)
return -ENOMEM;
cache = map->cache;
for (i = 0; i < map->num_reg_defaults; i++) {
unsigned int reg = map->reg_defaults[i].reg;
unsigned int index = regcache_flat_get_index(map, reg);
cache[index] = map->reg_defaults[i].def;
}
return 0;
}
static int regcache_flat_exit(struct regmap *map)
{
kfree(map->cache);
map->cache = NULL;
return 0;
}
static int regcache_flat_read(struct regmap *map,
unsigned int reg, unsigned int *value)
{
unsigned int *cache = map->cache;
unsigned int index = regcache_flat_get_index(map, reg);
*value = cache[index];
return 0;
}
static int regcache_flat_write(struct regmap *map, unsigned int reg,
unsigned int value)
{
unsigned int *cache = map->cache;
unsigned int index = regcache_flat_get_index(map, reg);
cache[index] = value;
return 0;
}
struct regcache_ops regcache_flat_ops = {
.type = REGCACHE_FLAT,
.name = "flat",
.init = regcache_flat_init,
.exit = regcache_flat_exit,
.read = regcache_flat_read,
.write = regcache_flat_write,
};