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authorLinus Torvalds <torvalds@linux-foundation.org>2011-10-25 15:57:45 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2011-10-25 15:57:45 +0400
commit4e7e2a2008f5d8c49791c412849d5b0232d39bb3 (patch)
tree32c3fa2d5cefb388689cb795225022769bf7b413 /include/linux
parent8a9ea3237e7eb5c25f09e429ad242ae5a3d5ea22 (diff)
parent7cccbdc84487616c3dbe493b04bfa1f362f4bc56 (diff)
downloadlinux-4e7e2a2008f5d8c49791c412849d5b0232d39bb3.tar.xz
Merge branch 'for-linus' of git://opensource.wolfsonmicro.com/regmap
* 'for-linus' of git://opensource.wolfsonmicro.com/regmap: (62 commits) mfd: Enable rbtree cache for wm831x devices regmap: Support some block operations on cached devices regmap: Allow caches for devices with no defaults regmap: Ensure rbtree syncs registers set to zero properly regmap: Allow rbtree to cache zero default values regmap: Warn on raw I/O as well as bulk reads that bypass cache regmap: Return a sensible error code if we fail to read the cache regmap: Use bsearch() to search the register defaults regmap: Fix doc comment regmap: Optimize the lookup path to use binary search regmap: Ensure we scream if we enable cache bypass/only at the same time regmap: Implement regcache_cache_bypass helper function regmap: Save/restore the bypass state upon syncing regmap: Lock the sync path, ensure we use the lockless _regmap_write() regmap: Fix apostrophe usage regmap: Make _regmap_write() global regmap: Fix lock used for regcache_cache_only() regmap: Grab the lock in regcache_cache_only() regmap: Modify map->cache_bypass directly regmap: Fix regcache_sync generic implementation ...
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/mfd/wm831x/core.h12
-rw-r--r--include/linux/mfd/wm831x/pdata.h3
-rw-r--r--include/linux/mfd/wm8400-private.h7
-rw-r--r--include/linux/mfd/wm8994/core.h9
-rw-r--r--include/linux/regmap.h79
5 files changed, 87 insertions, 23 deletions
diff --git a/include/linux/mfd/wm831x/core.h b/include/linux/mfd/wm831x/core.h
index 8dda8ded5cda..ed8fe0d04097 100644
--- a/include/linux/mfd/wm831x/core.h
+++ b/include/linux/mfd/wm831x/core.h
@@ -18,6 +18,7 @@
#include <linux/completion.h>
#include <linux/interrupt.h>
#include <linux/list.h>
+#include <linux/regmap.h>
/*
* Register values.
@@ -361,12 +362,8 @@ struct wm831x {
struct mutex io_lock;
struct device *dev;
- int (*read_dev)(struct wm831x *wm831x, unsigned short reg,
- int bytes, void *dest);
- int (*write_dev)(struct wm831x *wm831x, unsigned short reg,
- int bytes, void *src);
- void *control_data;
+ struct regmap *regmap;
int irq; /* Our chip IRQ */
struct mutex irq_lock;
@@ -374,6 +371,8 @@ struct wm831x {
int irq_masks_cur[WM831X_NUM_IRQ_REGS]; /* Currently active value */
int irq_masks_cache[WM831X_NUM_IRQ_REGS]; /* Cached hardware value */
+ bool soft_shutdown;
+
/* Chip revision based flags */
unsigned has_gpio_ena:1; /* Has GPIO enable bit */
unsigned has_cs_sts:1; /* Has current sink status bit */
@@ -412,8 +411,11 @@ int wm831x_bulk_read(struct wm831x *wm831x, unsigned short reg,
int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq);
void wm831x_device_exit(struct wm831x *wm831x);
int wm831x_device_suspend(struct wm831x *wm831x);
+void wm831x_device_shutdown(struct wm831x *wm831x);
int wm831x_irq_init(struct wm831x *wm831x, int irq);
void wm831x_irq_exit(struct wm831x *wm831x);
void wm831x_auxadc_init(struct wm831x *wm831x);
+extern struct regmap_config wm831x_regmap_config;
+
#endif
diff --git a/include/linux/mfd/wm831x/pdata.h b/include/linux/mfd/wm831x/pdata.h
index 0ba24599fe51..1d7a3f7b3b5d 100644
--- a/include/linux/mfd/wm831x/pdata.h
+++ b/include/linux/mfd/wm831x/pdata.h
@@ -123,6 +123,9 @@ struct wm831x_pdata {
/** Disable the touchscreen */
bool disable_touch;
+ /** The driver should initiate a power off sequence during shutdown */
+ bool soft_shutdown;
+
int irq_base;
int gpio_base;
int gpio_defaults[WM831X_GPIO_NUM];
diff --git a/include/linux/mfd/wm8400-private.h b/include/linux/mfd/wm8400-private.h
index 2aab4e93a5c9..0147b6968510 100644
--- a/include/linux/mfd/wm8400-private.h
+++ b/include/linux/mfd/wm8400-private.h
@@ -25,16 +25,15 @@
#include <linux/mutex.h>
#include <linux/platform_device.h>
+struct regmap;
+
#define WM8400_REGISTER_COUNT 0x55
struct wm8400 {
struct device *dev;
- int (*read_dev)(void *data, char reg, int count, u16 *dst);
- int (*write_dev)(void *data, char reg, int count, const u16 *src);
-
struct mutex io_lock;
- void *io_data;
+ struct regmap *regmap;
u16 reg_cache[WM8400_REGISTER_COUNT];
diff --git a/include/linux/mfd/wm8994/core.h b/include/linux/mfd/wm8994/core.h
index f0b69cdae41c..45df450d869f 100644
--- a/include/linux/mfd/wm8994/core.h
+++ b/include/linux/mfd/wm8994/core.h
@@ -24,6 +24,7 @@ enum wm8994_type {
struct regulator_dev;
struct regulator_bulk_data;
+struct regmap;
#define WM8994_NUM_GPIO_REGS 11
#define WM8994_NUM_LDO_REGS 2
@@ -50,18 +51,12 @@ struct regulator_bulk_data;
#define WM8994_IRQ_GPIO(x) (x + WM8994_IRQ_TEMP_WARN)
struct wm8994 {
- struct mutex io_lock;
struct mutex irq_lock;
enum wm8994_type type;
struct device *dev;
- int (*read_dev)(struct wm8994 *wm8994, unsigned short reg,
- int bytes, void *dest);
- int (*write_dev)(struct wm8994 *wm8994, unsigned short reg,
- int bytes, const void *src);
-
- void *control_data;
+ struct regmap *regmap;
int gpio_base;
int irq_base;
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 60a65cd7e1a0..3daac2d8dc37 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -20,9 +20,77 @@
struct i2c_client;
struct spi_device;
+/* An enum of all the supported cache types */
+enum regcache_type {
+ REGCACHE_NONE,
+ REGCACHE_INDEXED,
+ REGCACHE_RBTREE,
+ REGCACHE_LZO
+};
+
+/**
+ * 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.
+ *
+ * @writeable_reg: Optional callback returning true if the register
+ * can be written to.
+ * @readable_reg: Optional callback returning true if the register
+ * can be read from.
+ * @volatile_reg: Optional callback returning true if the register
+ * value can't be cached.
+ * @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.
+ *
+ * @read_flag_mask: Mask to be set in the top byte of the register when doing
+ * a read.
+ * @write_flag_mask: Mask to be set in the top byte of the register when doing
+ * a write. If both read_flag_mask and write_flag_mask are
+ * empty the regmap_bus default masks are used.
+ *
+ * @cache_type: The actual cache type.
+ * @reg_defaults_raw: Power on reset values for registers (for use with
+ * register cache support).
+ * @num_reg_defaults_raw: Number of elements in reg_defaults_raw.
+ */
struct regmap_config {
int reg_bits;
int val_bits;
+
+ 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;
+ unsigned int num_reg_defaults;
+ enum regcache_type cache_type;
+ const void *reg_defaults_raw;
+ unsigned int num_reg_defaults_raw;
+
+ u8 read_flag_mask;
+ u8 write_flag_mask;
};
typedef int (*regmap_hw_write)(struct device *dev, const void *data,
@@ -37,25 +105,18 @@ typedef int (*regmap_hw_read)(struct device *dev,
/**
* 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;
};
@@ -79,4 +140,8 @@ int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
int regmap_update_bits(struct regmap *map, unsigned int reg,
unsigned int mask, unsigned int val);
+int regcache_sync(struct regmap *map);
+void regcache_cache_only(struct regmap *map, bool enable);
+void regcache_cache_bypass(struct regmap *map, bool enable);
+
#endif