diff options
Diffstat (limited to 'include/linux/regmap.h')
| -rw-r--r-- | include/linux/regmap.h | 69 |
1 files changed, 67 insertions, 2 deletions
diff --git a/include/linux/regmap.h b/include/linux/regmap.h index 56af22ec9aba..7f7e00df3adf 100644 --- a/include/linux/regmap.h +++ b/include/linux/regmap.h @@ -14,12 +14,14 @@ */ #include <linux/list.h> +#include <linux/rbtree.h> struct module; struct device; struct i2c_client; struct spi_device; struct regmap; +struct regmap_range_cfg; /* An enum of all the supported cache types */ enum regcache_type { @@ -43,6 +45,14 @@ struct reg_default { #ifdef CONFIG_REGMAP +enum regmap_endian { + /* Unspecified -> 0 -> Backwards compatible default */ + REGMAP_ENDIAN_DEFAULT = 0, + REGMAP_ENDIAN_BIG, + REGMAP_ENDIAN_LITTLE, + REGMAP_ENDIAN_NATIVE, +}; + /** * Configuration for the register map of a device. * @@ -84,6 +94,15 @@ struct reg_default { * @reg_defaults_raw: Power on reset values for registers (for use with * register cache support). * @num_reg_defaults_raw: Number of elements in reg_defaults_raw. + * @reg_format_endian: Endianness for formatted register addresses. If this is + * DEFAULT, the @reg_format_endian_default value from the + * regmap bus is used. + * @val_format_endian: Endianness for formatted register values. If this is + * DEFAULT, the @reg_format_endian_default value from the + * regmap bus is used. + * + * @ranges: Array of configuration entries for virtual address ranges. + * @num_ranges: Number of range configuration entries. */ struct regmap_config { const char *name; @@ -109,6 +128,43 @@ struct regmap_config { u8 write_flag_mask; bool use_single_rw; + + enum regmap_endian reg_format_endian; + enum regmap_endian val_format_endian; + + const struct regmap_range_cfg *ranges; + unsigned int n_ranges; +}; + +/** + * Configuration for indirectly accessed or paged registers. + * Registers, mapped to this virtual range, are accessed in two steps: + * 1. page selector register update; + * 2. access through data window registers. + * + * @range_min: Address of the lowest register address in virtual range. + * @range_max: Address of the highest register in virtual range. + * + * @page_sel_reg: Register with selector field. + * @page_sel_mask: Bit shift for selector value. + * @page_sel_shift: Bit mask for selector value. + * + * @window_start: Address of first (lowest) register in data window. + * @window_len: Number of registers in data window. + */ +struct regmap_range_cfg { + /* Registers of virtual address range */ + unsigned int range_min; + unsigned int range_max; + + /* Page selector for indirect addressing */ + unsigned int selector_reg; + unsigned int selector_mask; + int selector_shift; + + /* Data window (per each page) */ + unsigned int window_start; + unsigned int window_len; }; typedef int (*regmap_hw_write)(void *context, const void *data, @@ -133,6 +189,12 @@ typedef void (*regmap_hw_free_context)(void *context); * data. * @read_flag_mask: Mask to be set in the top byte of the register when doing * a read. + * @reg_format_endian_default: Default endianness for formatted register + * addresses. Used when the regmap_config specifies DEFAULT. If this is + * DEFAULT, BIG is assumed. + * @val_format_endian_default: Default endianness for formatted register + * values. Used when the regmap_config specifies DEFAULT. If this is + * DEFAULT, BIG is assumed. */ struct regmap_bus { bool fast_io; @@ -141,6 +203,8 @@ struct regmap_bus { regmap_hw_read read; regmap_hw_free_context free_context; u8 read_flag_mask; + enum regmap_endian reg_format_endian_default; + enum regmap_endian val_format_endian_default; }; struct regmap *regmap_init(struct device *dev, @@ -219,6 +283,7 @@ struct regmap_irq { * @status_base: Base status register address. * @mask_base: Base mask register address. * @ack_base: Base ack address. If zero then the chip is clear on read. + * @wake_base: Base address for wake enables. If zero unsupported. * @irq_reg_stride: Stride to use for chips where registers are not contiguous. * * @num_regs: Number of registers in each control bank. @@ -232,6 +297,7 @@ struct regmap_irq_chip { unsigned int status_base; unsigned int mask_base; unsigned int ack_base; + unsigned int wake_base; unsigned int irq_reg_stride; int num_regs; @@ -243,7 +309,7 @@ struct regmap_irq_chip { struct regmap_irq_chip_data; int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags, - int irq_base, struct regmap_irq_chip *chip, + int irq_base, const struct regmap_irq_chip *chip, struct regmap_irq_chip_data **data); 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); @@ -361,7 +427,6 @@ static inline int regmap_register_patch(struct regmap *map, static inline struct regmap *dev_get_regmap(struct device *dev, const char *name) { - WARN_ONCE(1, "regmap API is disabled"); return NULL; } |