1 files changed, 82 insertions, 0 deletions

diff --git a/include/linux/regmap.h b/include/linux/regmap.h
new file mode 100644
index 000000000000..60a65cd7e1a0
--- /dev/null
+++ b/include/linux/regmap.h
@@ -0,0 +1,82 @@
+#ifndef __LINUX_REGMAP_H
+#define __LINUX_REGMAP_H
+
+/*
+ * Register map access API
+ *
+ * Copyright 2011 Wolfson Microelectronics plc
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/module.h>
+
+struct i2c_client;
+struct spi_device;
+
+struct regmap_config {
+        int reg_bits;
+        int val_bits;
+};
+
+typedef int (*regmap_hw_write)(struct device *dev, const void *data,
+                               size_t count);
+typedef int (*regmap_hw_gather_write)(struct device *dev,
+                                      const void *reg, size_t reg_len,
+                                      const void *val, size_t val_len);
+typedef int (*regmap_hw_read)(struct device *dev,
+                              const void *reg_buf, size_t reg_size,
+                              void *val_buf, size_t val_size);
+
+/**
+ * Description of a hardware bus for the register map infrastructure.
+ *
+ * @list: Internal use.
+ * @type: Bus type, used to identify bus to be used for a device.
+ * @write: Write operation.
+ * @gather_write: Write operation with split register/value, return -ENOTSUPP
+ *                if not implemented  on a given device.
+ * @read: Read operation.  Data is returned in the buffer used to transmit
+ *         data.
+ * @owner: Module with the bus implementation, used to pin the implementation
+ *         in memory.
+ * @read_flag_mask: Mask to be set in the top byte of the register when doing
+ *                  a read.
+ */
+struct regmap_bus {
+        struct list_head list;
+        struct bus_type *type;
+        regmap_hw_write write;
+        regmap_hw_gather_write gather_write;
+        regmap_hw_read read;
+        struct module *owner;
+        u8 read_flag_mask;
+};
+
+struct regmap *regmap_init(struct device *dev,
+                           const struct regmap_bus *bus,
+                           const struct regmap_config *config);
+struct regmap *regmap_init_i2c(struct i2c_client *i2c,
+                               const struct regmap_config *config);
+struct regmap *regmap_init_spi(struct spi_device *dev,
+                               const struct regmap_config *config);
+
+void regmap_exit(struct regmap *map);
+int regmap_write(struct regmap *map, unsigned int reg, unsigned int val);
+int regmap_raw_write(struct regmap *map, unsigned int reg,
+                     const void *val, size_t val_len);
+int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val);
+int regmap_raw_read(struct regmap *map, unsigned int reg,
+                    void *val, size_t val_len);
+int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
+                     size_t val_count);
+int regmap_update_bits(struct regmap *map, unsigned int reg,
+                       unsigned int mask, unsigned int val);
+
+#endif