void *work_buf; /* Scratch buffer used to format I/O */
struct regmap_format format; /* Buffer format */
const struct regmap_bus *bus;
+
+ 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);
};
static void regmap_format_4_12_write(struct regmap *map,
map->format.val_bytes = config->val_bits / 8;
map->dev = dev;
map->bus = bus;
+ map->max_register = config->max_register;
+ map->writeable_reg = config->writeable_reg;
+ map->readable_reg = config->readable_reg;
+ map->volatile_reg = config->volatile_reg;
switch (config->reg_bits) {
case 4:
u8[0] |= map->bus->read_flag_mask;
ret = map->bus->read(map->dev, map->work_buf, map->format.reg_bytes,
- val, map->format.val_bytes);
+ val, val_len);
if (ret != 0)
return ret;
struct i2c_client;
struct spi_device;
+/**
+ * Configuration for the register map of a device.
+ *
+ * @reg_bits: Number of bits in a register address, mandatory.
+ * @val_bits: Number of bits in a register value, mandatory.
+ *
+ * @max_register: Optional, specifies the maximum valid register index.
+ * @writeable_register: Optional callback returning true if the register
+ * can be written to.
+ * @readable_register: Optional callback returning true if the register
+ * can be read from.
+ * @volatile_register: Optional callback returning true if the register
+ * value can't be cached.
+ * @precious_register: 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).
+ */
struct regmap_config {
int reg_bits;
int val_bits;
+
+ 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);
};
typedef int (*regmap_hw_write)(struct device *dev, const void *data,