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37613fa5b7
There were a few files in the regmap code that did not have SPDX identifiers on them, so fix that up. At the same time, remove the "free form" text that specified the license of the file, as that is impossible for any tool to properly parse. Also, as Mark loves // comment markers, convert all of the headers to be the same to make things look consistent :) Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Mark Brown <broonie@kernel.org>
84 lines
1.8 KiB
C
84 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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//
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// Register cache access API - flat caching support
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//
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// Copyright 2012 Wolfson Microelectronics plc
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//
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// Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
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#include <linux/device.h>
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#include <linux/seq_file.h>
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#include <linux/slab.h>
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#include "internal.h"
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static inline unsigned int regcache_flat_get_index(const struct regmap *map,
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unsigned int reg)
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{
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return regcache_get_index_by_order(map, reg);
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}
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static int regcache_flat_init(struct regmap *map)
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{
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int i;
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unsigned int *cache;
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if (!map || map->reg_stride_order < 0 || !map->max_register)
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return -EINVAL;
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map->cache = kcalloc(regcache_flat_get_index(map, map->max_register)
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+ 1, sizeof(unsigned int), GFP_KERNEL);
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if (!map->cache)
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return -ENOMEM;
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cache = map->cache;
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for (i = 0; i < map->num_reg_defaults; i++) {
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unsigned int reg = map->reg_defaults[i].reg;
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unsigned int index = regcache_flat_get_index(map, reg);
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cache[index] = map->reg_defaults[i].def;
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}
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return 0;
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}
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static int regcache_flat_exit(struct regmap *map)
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{
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kfree(map->cache);
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map->cache = NULL;
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return 0;
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}
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static int regcache_flat_read(struct regmap *map,
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unsigned int reg, unsigned int *value)
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{
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unsigned int *cache = map->cache;
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unsigned int index = regcache_flat_get_index(map, reg);
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*value = cache[index];
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return 0;
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}
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static int regcache_flat_write(struct regmap *map, unsigned int reg,
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unsigned int value)
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{
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unsigned int *cache = map->cache;
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unsigned int index = regcache_flat_get_index(map, reg);
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cache[index] = value;
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return 0;
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}
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struct regcache_ops regcache_flat_ops = {
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.type = REGCACHE_FLAT,
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.name = "flat",
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.init = regcache_flat_init,
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.exit = regcache_flat_exit,
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.read = regcache_flat_read,
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.write = regcache_flat_write,
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};
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