diff options
Diffstat (limited to 'include/linux/regmap.h')
| -rw-r--r-- | include/linux/regmap.h | 95 |
1 files changed, 88 insertions, 7 deletions
diff --git a/include/linux/regmap.h b/include/linux/regmap.h index e3bcc3f4dcb8..b7e95bf942c9 100644 --- a/include/linux/regmap.h +++ b/include/linux/regmap.h @@ -19,6 +19,7 @@ struct module; struct device; struct i2c_client; +struct irq_domain; struct spi_device; struct regmap; struct regmap_range_cfg; @@ -54,6 +55,39 @@ enum regmap_endian { }; /** + * A register range, used for access related checks + * (readable/writeable/volatile/precious checks) + * + * @range_min: address of first register + * @range_max: address of last register + */ +struct regmap_range { + unsigned int range_min; + unsigned int range_max; +}; + +/* + * A table of ranges including some yes ranges and some no ranges. + * If a register belongs to a no_range, the corresponding check function + * will return false. If a register belongs to a yes range, the corresponding + * check function will return true. "no_ranges" are searched first. + * + * @yes_ranges : pointer to an array of regmap ranges used as "yes ranges" + * @n_yes_ranges: size of the above array + * @no_ranges: pointer to an array of regmap ranges used as "no ranges" + * @n_no_ranges: size of the above array + */ +struct regmap_access_table { + const struct regmap_range *yes_ranges; + unsigned int n_yes_ranges; + const struct regmap_range *no_ranges; + unsigned int n_no_ranges; +}; + +typedef void (*regmap_lock)(void *); +typedef void (*regmap_unlock)(void *); + +/** * Configuration for the register map of a device. * * @name: Optional name of the regmap. Useful when a device has multiple @@ -67,16 +101,39 @@ enum regmap_endian { * @val_bits: Number of bits in a register value, mandatory. * * @writeable_reg: Optional callback returning true if the register - * can be written to. + * can be written to. If this field is NULL but wr_table + * (see below) is not, the check is performed on such table + * (a register is writeable if it belongs to one of the ranges + * specified by wr_table). * @readable_reg: Optional callback returning true if the register - * can be read from. + * can be read from. If this field is NULL but rd_table + * (see below) is not, the check is performed on such table + * (a register is readable if it belongs to one of the ranges + * specified by rd_table). * @volatile_reg: Optional callback returning true if the register - * value can't be cached. + * value can't be cached. If this field is NULL but + * volatile_table (see below) is not, the check is performed on + * such table (a register is volatile if it belongs to one of + * the ranges specified by volatile_table). * @precious_reg: Optional callback returning true if the rgister - * should not be read outside of a call from the driver - * (eg, a clear on read interrupt status register). + * should not be read outside of a call from the driver + * (eg, a clear on read interrupt status register). If this + * field is NULL but precious_table (see below) is not, the + * check is performed on such table (a register is precious if + * it belongs to one of the ranges specified by precious_table). + * @lock: Optional lock callback (overrides regmap's default lock + * function, based on spinlock or mutex). + * @unlock: As above for unlocking. + * @lock_arg: this field is passed as the only argument of lock/unlock + * functions (ignored in case regular lock/unlock functions + * are not overridden). * * @max_register: Optional, specifies the maximum valid register index. + * @wr_table: Optional, points to a struct regmap_access_table specifying + * valid ranges for write access. + * @rd_table: As above, for read access. + * @volatile_table: As above, for volatile registers. + * @precious_table: As above, for precious registers. * @reg_defaults: Power on reset values for registers (for use with * register cache support). * @num_reg_defaults: Number of elements in reg_defaults. @@ -116,8 +173,15 @@ struct regmap_config { 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); + regmap_lock lock; + regmap_unlock unlock; + void *lock_arg; unsigned int max_register; + 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; const struct reg_default *reg_defaults; unsigned int num_reg_defaults; enum regcache_type cache_type; @@ -133,7 +197,7 @@ struct regmap_config { enum regmap_endian val_format_endian; const struct regmap_range_cfg *ranges; - unsigned int n_ranges; + unsigned int num_ranges; }; /** @@ -142,6 +206,8 @@ struct regmap_config { * 1. page selector register update; * 2. access through data window registers. * + * @name: Descriptive name for diagnostics + * * @range_min: Address of the lowest register address in virtual range. * @range_max: Address of the highest register in virtual range. * @@ -153,6 +219,8 @@ struct regmap_config { * @window_len: Number of registers in data window. */ struct regmap_range_cfg { + const char *name; + /* Registers of virtual address range */ unsigned int range_min; unsigned int range_max; @@ -181,7 +249,9 @@ typedef void (*regmap_hw_free_context)(void *context); * Description of a hardware bus for the register map infrastructure. * * @fast_io: Register IO is fast. Use a spinlock instead of a mutex - * to perform locking. + * to perform locking. This field is ignored if custom lock/unlock + * functions are used (see fields lock/unlock of + * struct regmap_config). * @write: Write operation. * @gather_write: Write operation with split register/value, return -ENOTSUPP * if not implemented on a given device. @@ -262,6 +332,16 @@ void regcache_mark_dirty(struct regmap *map); int regmap_register_patch(struct regmap *map, const struct reg_default *regs, int num_regs); +static inline bool regmap_reg_in_range(unsigned int reg, + const struct regmap_range *range) +{ + return reg >= range->range_min && reg <= range->range_max; +} + +bool regmap_reg_in_ranges(unsigned int reg, + const struct regmap_range *ranges, + unsigned int nranges); + /** * Description of an IRQ for the generic regmap irq_chip. * @@ -317,6 +397,7 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags, void regmap_del_irq_chip(int irq, struct regmap_irq_chip_data *data); int regmap_irq_chip_get_base(struct regmap_irq_chip_data *data); int regmap_irq_get_virq(struct regmap_irq_chip_data *data, int irq); +struct irq_domain *regmap_irq_get_domain(struct regmap_irq_chip_data *data); #else |