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authorLinus Torvalds <torvalds@linux-foundation.org>2009-06-19 17:45:51 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-19 17:45:51 -0700
commit5c6fb0059cec9a3c0f6d88a0ddf3d62ad323cd57 (patch)
tree49b4ceaeb5686fca4546315155d04633adf25b3c /include
parent31583d6acf940d2951bc8716557b06d9de5a0c4b (diff)
parentc70366732f67dbdb32f7fe9c6aa59299b76feca6 (diff)
Merge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging
* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging: i2c: New macro to initialize i2c address lists on the fly i2c: Don't advertise i2c functions when not available i2c: Use rwsem instead of mutex for board info i2c: Add a sysfs interface to instantiate devices i2c: Limit core locking to the necessary sections i2c: Kill the redundant client list i2c: Kill is_newstyle_driver i2c: Merge i2c_attach_client into i2c_new_device i2c: Drop i2c_probe function i2c: Get rid of the legacy binding model i2c: Kill client_register and client_unregister methods
Diffstat (limited to 'include')
-rw-r--r--include/linux/i2c.h72
1 files changed, 23 insertions, 49 deletions
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index ad258059603..f4784c0fe97 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -47,6 +47,7 @@ struct i2c_driver;
union i2c_smbus_data;
struct i2c_board_info;
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
/*
* The master routines are the ones normally used to transmit data to devices
* on a bus (or read from them). Apart from two basic transfer functions to
@@ -93,6 +94,7 @@ extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client *client,
extern s32 i2c_smbus_write_i2c_block_data(struct i2c_client *client,
u8 command, u8 length,
const u8 *values);
+#endif /* I2C */
/**
* struct i2c_driver - represent an I2C device driver
@@ -100,9 +102,8 @@ extern s32 i2c_smbus_write_i2c_block_data(struct i2c_client *client,
* @class: What kind of i2c device we instantiate (for detect)
* @attach_adapter: Callback for bus addition (for legacy drivers)
* @detach_adapter: Callback for bus removal (for legacy drivers)
- * @detach_client: Callback for device removal (for legacy drivers)
- * @probe: Callback for device binding (new-style drivers)
- * @remove: Callback for device unbinding (new-style drivers)
+ * @probe: Callback for device binding
+ * @remove: Callback for device unbinding
* @shutdown: Callback for device shutdown
* @suspend: Callback for device suspend
* @resume: Callback for device resume
@@ -137,26 +138,14 @@ struct i2c_driver {
int id;
unsigned int class;
- /* Notifies the driver that a new bus has appeared. This routine
- * can be used by the driver to test if the bus meets its conditions
- * & seek for the presence of the chip(s) it supports. If found, it
- * registers the client(s) that are on the bus to the i2c admin. via
- * i2c_attach_client. (LEGACY I2C DRIVERS ONLY)
+ /* Notifies the driver that a new bus has appeared or is about to be
+ * removed. You should avoid using this if you can, it will probably
+ * be removed in a near future.
*/
int (*attach_adapter)(struct i2c_adapter *);
int (*detach_adapter)(struct i2c_adapter *);
- /* tells the driver that a client is about to be deleted & gives it
- * the chance to remove its private data. Also, if the client struct
- * has been dynamically allocated by the driver in the function above,
- * it must be freed here. (LEGACY I2C DRIVERS ONLY)
- */
- int (*detach_client)(struct i2c_client *) __deprecated;
-
- /* Standard driver model interfaces, for "new style" i2c drivers.
- * With the driver model, device enumeration is NEVER done by drivers;
- * it's done by infrastructure. (NEW STYLE DRIVERS ONLY)
- */
+ /* Standard driver model interfaces */
int (*probe)(struct i2c_client *, const struct i2c_device_id *);
int (*remove)(struct i2c_client *);
@@ -191,9 +180,8 @@ struct i2c_driver {
* @driver: device's driver, hence pointer to access routines
* @dev: Driver model device node for the slave.
* @irq: indicates the IRQ generated by this device (if any)
- * @list: list of active/busy clients (DEPRECATED)
- * @detected: member of an i2c_driver.clients list
- * @released: used to synchronize client releases & detaches and references
+ * @detected: member of an i2c_driver.clients list or i2c-core's
+ * userspace_devices list
*
* An i2c_client identifies a single device (i.e. chip) connected to an
* i2c bus. The behaviour exposed to Linux is defined by the driver
@@ -209,9 +197,7 @@ struct i2c_client {
struct i2c_driver *driver; /* and our access routines */
struct device dev; /* the device structure */
int irq; /* irq issued by device */
- struct list_head list; /* DEPRECATED */
struct list_head detected;
- struct completion released;
};
#define to_i2c_client(d) container_of(d, struct i2c_client, dev)
@@ -248,11 +234,10 @@ static inline void i2c_set_clientdata(struct i2c_client *dev, void *data)
* that, such as chip type, configuration, associated IRQ, and so on.
*
* i2c_board_info is used to build tables of information listing I2C devices
- * that are present. This information is used to grow the driver model tree
- * for "new style" I2C drivers. For mainboards this is done statically using
- * i2c_register_board_info(); bus numbers identify adapters that aren't
- * yet available. For add-on boards, i2c_new_device() does this dynamically
- * with the adapter already known.
+ * that are present. This information is used to grow the driver model tree.
+ * For mainboards this is done statically using i2c_register_board_info();
+ * bus numbers identify adapters that aren't yet available. For add-on boards,
+ * i2c_new_device() does this dynamically with the adapter already known.
*/
struct i2c_board_info {
char type[I2C_NAME_SIZE];
@@ -277,6 +262,7 @@ struct i2c_board_info {
.type = dev_type, .addr = (dev_addr)
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
/* Add-on boards should register/unregister their devices; e.g. a board
* with integrated I2C, a config eeprom, sensors, and a codec that's
* used in conjunction with the primary hardware.
@@ -300,6 +286,7 @@ extern struct i2c_client *
i2c_new_dummy(struct i2c_adapter *adap, u16 address);
extern void i2c_unregister_device(struct i2c_client *);
+#endif /* I2C */
/* Mainboard arch_initcall() code should register all its I2C devices.
* This is done at arch_initcall time, before declaring any i2c adapters.
@@ -316,7 +303,7 @@ i2c_register_board_info(int busnum, struct i2c_board_info const *info,
{
return 0;
}
-#endif
+#endif /* I2C_BOARDINFO */
/*
* The following structs are for those who like to implement new bus drivers:
@@ -352,21 +339,15 @@ struct i2c_adapter {
const struct i2c_algorithm *algo; /* the algorithm to access the bus */
void *algo_data;
- /* --- administration stuff. */
- int (*client_register)(struct i2c_client *) __deprecated;
- int (*client_unregister)(struct i2c_client *) __deprecated;
-
/* data fields that are valid for all devices */
u8 level; /* nesting level for lockdep */
struct mutex bus_lock;
- struct mutex clist_lock;
int timeout; /* in jiffies */
int retries;
struct device dev; /* the adapter device */
int nr;
- struct list_head clients; /* DEPRECATED */
char name[48];
struct completion dev_released;
};
@@ -412,11 +393,16 @@ struct i2c_client_address_data {
/* The numbers to use to set I2C bus address */
#define ANY_I2C_BUS 0xffff
+/* Construct an I2C_CLIENT_END-terminated array of i2c addresses */
+#define I2C_ADDRS(addr, addrs...) \
+ ((const unsigned short []){ addr, ## addrs, I2C_CLIENT_END })
+
/* ----- functions exported by i2c.o */
/* administration...
*/
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
extern int i2c_add_adapter(struct i2c_adapter *);
extern int i2c_del_adapter(struct i2c_adapter *);
extern int i2c_add_numbered_adapter(struct i2c_adapter *);
@@ -429,11 +415,6 @@ static inline int i2c_add_driver(struct i2c_driver *driver)
return i2c_register_driver(THIS_MODULE, driver);
}
-/* These are deprecated, your driver should use the standard .probe()
- * and .remove() methods instead. */
-extern int __deprecated i2c_attach_client(struct i2c_client *);
-extern int __deprecated i2c_detach_client(struct i2c_client *);
-
extern struct i2c_client *i2c_use_client(struct i2c_client *client);
extern void i2c_release_client(struct i2c_client *client);
@@ -442,14 +423,6 @@ extern void i2c_release_client(struct i2c_client *client);
extern void i2c_clients_command(struct i2c_adapter *adap,
unsigned int cmd, void *arg);
-/* Detect function. It iterates over all possible addresses itself.
- * It will only call found_proc if some client is connected at the
- * specific address (unless a 'force' matched);
- */
-extern int i2c_probe(struct i2c_adapter *adapter,
- const struct i2c_client_address_data *address_data,
- int (*found_proc) (struct i2c_adapter *, int, int));
-
extern struct i2c_adapter *i2c_get_adapter(int id);
extern void i2c_put_adapter(struct i2c_adapter *adap);
@@ -471,6 +444,7 @@ static inline int i2c_adapter_id(struct i2c_adapter *adap)
{
return adap->nr;
}
+#endif /* I2C */
#endif /* __KERNEL__ */
/**