regmap: Add functions to check for access on registers
We're going to be using these in quite a few places so factor out the readable/writable/volatile/precious checks. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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@ -48,6 +48,11 @@ struct regmap {
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bool (*precious_reg)(struct device *dev, unsigned int reg);
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};
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bool regmap_writeable(struct regmap *map, unsigned int reg);
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bool regmap_readable(struct regmap *map, unsigned int reg);
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bool regmap_volatile(struct regmap *map, unsigned int reg);
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bool regmap_precious(struct regmap *map, unsigned int reg);
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#ifdef CONFIG_DEBUG_FS
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extern void regmap_debugfs_initcall(void);
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extern void regmap_debugfs_init(struct regmap *map);
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@ -52,12 +52,10 @@ static ssize_t regmap_map_read_file(struct file *file, char __user *user_buf,
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tot_len = reg_len + val_len + 3; /* : \n */
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for (i = 0; i < map->max_register; i++) {
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if (map->readable_reg &&
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!map->readable_reg(map->dev, i))
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if (!regmap_readable(map, i))
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continue;
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if (map->precious_reg &&
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map->precious_reg(map->dev, i))
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if (regmap_precious(map, i))
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continue;
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/* If we're in the region the user is trying to read */
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@ -20,6 +20,50 @@
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#include "internal.h"
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bool regmap_writeable(struct regmap *map, unsigned int reg)
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{
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if (map->max_register && reg > map->max_register)
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return false;
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if (map->writeable_reg)
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return map->writeable_reg(map->dev, reg);
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return true;
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}
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bool regmap_readable(struct regmap *map, unsigned int reg)
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{
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if (map->max_register && reg > map->max_register)
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return false;
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if (map->readable_reg)
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return map->readable_reg(map->dev, reg);
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return true;
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}
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bool regmap_volatile(struct regmap *map, unsigned int reg)
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{
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if (map->max_register && reg > map->max_register)
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return false;
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if (map->volatile_reg)
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return map->volatile_reg(map->dev, reg);
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return true;
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}
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bool regmap_precious(struct regmap *map, unsigned int reg)
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{
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if (map->max_register && reg > map->max_register)
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return false;
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if (map->precious_reg)
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return map->precious_reg(map->dev, reg);
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return false;
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}
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static void regmap_format_4_12_write(struct regmap *map,
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unsigned int reg, unsigned int val)
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{
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