linux-4.4.1/regmap の履歴(No.1)

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linux-4.4.1/regmap へ行く。
- 1 (2016-04-28 (木) 17:18:38)
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パス: linux-4.4.1/drivers/base/regmap/internal.h
FIXME: これは何？
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struct regmap {
        union {
                struct mutex mutex;
                struct {
                        spinlock_t spinlock;
                        unsigned long spinlock_flags;
                };
        };
        regmap_lock lock;
        regmap_unlock unlock;
        void *lock_arg; /* This is passed to lock/unlock functions */
        gfp_t alloc_flags;

        struct device *dev; /* Device we do I/O on */
        void *work_buf;     /* Scratch buffer used to format I/O */
        struct regmap_format format;  /* Buffer format */
        const struct regmap_bus *bus;
        void *bus_context;
        const char *name;

        bool async;
        spinlock_t async_lock;
        wait_queue_head_t async_waitq;
        struct list_head async_list;
        struct list_head async_free;
        int async_ret;

#ifdef CONFIG_DEBUG_FS
        struct dentry *debugfs;
        const char *debugfs_name;

        unsigned int debugfs_reg_len;
        unsigned int debugfs_val_len;
        unsigned int debugfs_tot_len;

        struct list_head debugfs_off_cache;
        struct mutex cache_lock;
#endif

        unsigned int max_register;
        bool (*writeable_reg)(struct device *dev, unsigned int reg);
        bool (*readable_reg)(struct device *dev, unsigned int reg);
        bool (*volatile_reg)(struct device *dev, unsigned int reg);
        bool (*precious_reg)(struct device *dev, unsigned int reg);
        const struct regmap_access_table *wr_table;
        const struct regmap_access_table *rd_table;
        const struct regmap_access_table *volatile_table;
        const struct regmap_access_table *precious_table;

        int (*reg_read)(void *context, unsigned int reg, unsigned int *val);
        int (*reg_write)(void *context, unsigned int reg, unsigned int val);
        int (*reg_update_bits)(void *context, unsigned int reg,
                               unsigned int mask, unsigned int val);

        bool defer_caching;

        u8 read_flag_mask;
        u8 write_flag_mask;

        /* number of bits to (left) shift the reg value when formatting*/
        int reg_shift;
        int reg_stride;

        /* regcache specific members */
        const struct regcache_ops *cache_ops;
        enum regcache_type cache_type;

        /* number of bytes in reg_defaults_raw */
        unsigned int cache_size_raw;
        /* number of bytes per word in reg_defaults_raw */
        unsigned int cache_word_size;
        /* number of entries in reg_defaults */
        unsigned int num_reg_defaults;
        /* number of entries in reg_defaults_raw */
        unsigned int num_reg_defaults_raw;

        /* if set, only the cache is modified not the HW */
        bool cache_only;
        /* if set, only the HW is modified not the cache */
        bool cache_bypass;
        /* if set, remember to free reg_defaults_raw */
        bool cache_free;

        struct reg_default *reg_defaults;
        const void *reg_defaults_raw;
        void *cache;
        /* if set, the cache contains newer data than the HW */
        bool cache_dirty;
        /* if set, the HW registers are known to match map->reg_defaults */
        bool no_sync_defaults;

        struct reg_sequence *patch;
        int patch_regs;

        /* if set, converts bulk read to single read */
        bool use_single_read;
        /* if set, converts bulk read to single read */
        bool use_single_write;
        /* if set, the device supports multi write mode */
        bool can_multi_write;

        /* if set, raw reads/writes are limited to this size */
        size_t max_raw_read;
        size_t max_raw_write;

        struct rb_root range_tree;
        void *selector_work_buf;        /* Scratch buffer used for selector */
};
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linux-4.4.1/regmap の履歴(No.1)

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