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authorMark Brown <broonie@opensource.wolfsonmicro.com>2011-08-21 12:55:20 +0100
committerMark Brown <broonie@opensource.wolfsonmicro.com>2011-08-21 12:55:20 +0100
commitae130d22de8f8977cc3015bfafc09ff93744d92a (patch)
tree3492fc5b1d5d32a297c8187a03fc414487e76c40 /include/linux/regmap.h
parent449e38427fe57a6120fecd1051981c89ee862b3d (diff)
parentbd20eb541ebbb17a5e047cd20e74b9ccf19a4123 (diff)
Merge branch 'regmap-interface' into regmap-next
Diffstat (limited to 'include/linux/regmap.h')
-rw-r--r--include/linux/regmap.h24
1 files changed, 22 insertions, 2 deletions
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 20a8fbf19d4..449e2642da9 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -21,12 +21,24 @@ struct i2c_client;
struct spi_device;
/**
+ * Default value for a register. We use an array of structs rather
+ * than a simple array as many modern devices have very sparse
+ * register maps.
+ *
+ * @reg: Register address.
+ * @def: Register default value.
+ */
+struct reg_default {
+ unsigned int reg;
+ unsigned int def;
+};
+
+/**
* 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_reg: Optional callback returning true if the register
* can be written to.
* @readable_reg: Optional callback returning true if the register
@@ -36,16 +48,24 @@ struct spi_device;
* @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).
+ *
+ * @max_register: Optional, specifies the maximum valid register index.
+ * @reg_defaults: Power on reset values for registers (for use with
+ * register cache support).
+ * @num_reg_defaults: Number of elements in reg_defaults.
*/
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);
+
+ unsigned int max_register;
+ struct reg_default *reg_defaults;
+ int num_reg_defaults;
};
typedef int (*regmap_hw_write)(struct device *dev, const void *data,