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authorLinus Torvalds <torvalds@linux-foundation.org>2011-07-23 11:14:47 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-07-23 11:14:47 -0700
commitf5fc87905ea075a0b14878086fd4fe38be128844 (patch)
tree09d7ad146b737caefb472534de95ef53f95d7e65 /include
parentd4e06701b89286a306b31e20ec69a904fae374a1 (diff)
parent90923351d480fffd0d24646db83f6f8315eed0d9 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap: regulator: Convert tps65023 to use regmap API regmap: Add SPI bus support regmap: Add I2C bus support regmap: Add generic non-memory mapped register access API
Diffstat (limited to 'include')
-rw-r--r--include/linux/regmap.h82
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