1 files changed, 62 insertions, 0 deletions
diff --git a/include/regmap.h b/include/regmap.h
new file mode 100644
index 0000000000..4cb473cbfe
--- /dev/null
+++ b/include/regmap.h
@@ -0,0 +1,62 @@
+#ifndef __REGMAP_H
+#define __REGMAP_H
+
+/**
+ * Configuration for the register map of a device.
+ *
+ * @name: Optional name of the regmap. Useful when a device has multiple
+ *        register regions.
+ *
+ * @reg_bits: Number of bits in a register address, mandatory.
+ * @reg_stride: The register address stride. Valid register addresses are a
+ *              multiple of this value. If set to 0, a value of 1 will be
+ *              used.
+ * @pad_bits: Number of bits of padding between register and value.
+ * @val_bits: Number of bits in a register value, mandatory.
+ *
+ * @max_register: Optional, specifies the maximum valid register index.
+ */
+struct regmap_config {
+	const char *name;
+
+	int reg_bits;
+	int reg_stride;
+	int pad_bits;
+	int val_bits;
+
+	unsigned int max_register;
+};
+
+typedef int (*regmap_hw_reg_read)(void *context, unsigned int reg,
+				  unsigned int *val);
+typedef int (*regmap_hw_reg_write)(void *context, unsigned int reg,
+				   unsigned int val);
+
+struct regmap_bus {
+	regmap_hw_reg_write reg_write;
+	regmap_hw_reg_read reg_read;
+};
+
+struct regmap *regmap_init(struct device_d *dev,
+			     const struct regmap_bus *bus,
+			     void *bus_context,
+			     const struct regmap_config *config);
+
+struct regmap *dev_get_regmap(struct device_d *dev, const char *name);
+struct regmap *of_node_to_regmap(struct device_node *node);
+
+int regmap_register_cdev(struct regmap *map, const char *name);
+
+int regmap_write(struct regmap *map, unsigned int reg, unsigned int val);
+int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val);
+
+int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
+		    size_t val_len);
+int regmap_bulk_write(struct regmap *map, unsigned int reg,
+		     const void *val, size_t val_len);
+
+int regmap_get_val_bytes(struct regmap *map);
+int regmap_get_max_register(struct regmap *map);
+int regmap_get_reg_stride(struct regmap *map);
+
+#endif /* __REGMAP_H */
+\ No newline at end of file