1 files changed, 103 insertions, 20 deletions

diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 9428092017e3..cae7d618030c 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -35,11 +35,6 @@
 #include <linux/sched.h>        /* for completion */
 #include <linux/mutex.h>
 
-/* --- For i2c-isa ---------------------------------------------------- */
-
-extern void i2c_adapter_dev_release(struct device *dev);
-extern struct device_driver i2c_adapter_driver;
-extern struct class i2c_adapter_class;
 extern struct bus_type i2c_bus_type;
 
 /* --- General options ------------------------------------------------ */
@@ -87,6 +82,9 @@ extern s32 i2c_smbus_write_byte_data(struct i2c_client * client,
 extern s32 i2c_smbus_read_word_data(struct i2c_client * client, u8 command);
 extern s32 i2c_smbus_write_word_data(struct i2c_client * client,
                                      u8 command, u16 value);
+/* Returns the number of read bytes */
+extern s32 i2c_smbus_read_block_data(struct i2c_client *client,
+                                     u8 command, u8 *values);
 extern s32 i2c_smbus_write_block_data(struct i2c_client * client,
                                       u8 command, u8 length,
                                       const u8 *values);
@@ -114,7 +112,7 @@ struct i2c_driver {
          * 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.
+         * i2c_attach_client.  (LEGACY I2C DRIVERS ONLY)
          */
         int (*attach_adapter)(struct i2c_adapter *);
         int (*detach_adapter)(struct i2c_adapter *);
@@ -122,10 +120,17 @@ struct i2c_driver {
         /* 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.
+         * it must be freed here.  (LEGACY I2C DRIVERS ONLY)
          */
         int (*detach_client)(struct i2c_client *);
 
+        /* 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)
+         */
+        int (*probe)(struct i2c_client *);
+        int (*remove)(struct i2c_client *);
+
         /* driver model interfaces that don't relate to enumeration  */
         void (*shutdown)(struct i2c_client *);
         int (*suspend)(struct i2c_client *, pm_message_t mesg);
@@ -141,25 +146,34 @@ struct i2c_driver {
 };
 #define to_i2c_driver(d) container_of(d, struct i2c_driver, driver)
 
-#define I2C_NAME_SIZE   50
+#define I2C_NAME_SIZE   20
 
-/*
- * i2c_client identifies a single device (i.e. chip) that is connected to an
- * i2c bus. The behaviour is defined by the routines of the driver. This
- * function is mainly used for lookup & other admin. functions.
+/**
+ * struct i2c_client - represent an I2C slave device
+ * @addr: Address used on the I2C bus connected to the parent adapter.
+ * @name: Indicates the type of the device, usually a chip name that's
+ *      generic enough to hide second-sourcing and compatible revisions.
+ * @dev: Driver model device node for the slave.
+ * @driver_name: Identifies new-style driver used with this device; also
+ *      used as the module name for hotplug/coldplug modprobe support.
+ *
+ * An i2c_client identifies a single device (i.e. chip) connected to an
+ * i2c bus. The behaviour is defined by the routines of the driver.
  */
 struct i2c_client {
-        unsigned int flags;             /* div., see below              */
+        unsigned short flags;           /* div., see below              */
         unsigned short addr;            /* chip address - NOTE: 7bit    */
                                         /* addresses are stored in the  */
                                         /* _LOWER_ 7 bits               */
+        char name[I2C_NAME_SIZE];
         struct i2c_adapter *adapter;    /* the adapter we sit on        */
         struct i2c_driver *driver;      /* and our access routines      */
         int usage_count;                /* How many accesses currently  */
                                         /* to the client                */
         struct device dev;              /* the device structure         */
+        int irq;                        /* irq issued by device (or -1) */
+        char driver_name[KOBJ_NAME_LEN];
         struct list_head list;
-        char name[I2C_NAME_SIZE];
         struct completion released;
 };
 #define to_i2c_client(d) container_of(d, struct i2c_client, dev)
@@ -179,6 +193,76 @@ static inline void i2c_set_clientdata (struct i2c_client *dev, void *data)
         dev_set_drvdata (&dev->dev, data);
 }
 
+/**
+ * struct i2c_board_info - template for device creation
+ * @driver_name: identifies the driver to be bound to the device
+ * @type: optional chip type information, to initialize i2c_client.name
+ * @flags: to initialize i2c_client.flags
+ * @addr: stored in i2c_client.addr
+ * @platform_data: stored in i2c_client.dev.platform_data
+ * @irq: stored in i2c_client.irq
+
+ * I2C doesn't actually support hardware probing, although controllers and
+ * devices may be able to use I2C_SMBUS_QUICK to tell whether or not there's
+ * a device at a given address.  Drivers commonly need more information than
+ * 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(), where @bus_num represents an adapter that isn't
+ * yet available.  For add-on boards, i2c_new_device() does this dynamically
+ * with the adapter already known.
+ */
+struct i2c_board_info {
+        char            driver_name[KOBJ_NAME_LEN];
+        char            type[I2C_NAME_SIZE];
+        unsigned short  flags;
+        unsigned short  addr;
+        void            *platform_data;
+        int             irq;
+};
+
+/**
+ * I2C_BOARD_INFO - macro used to list an i2c device and its driver
+ * @driver: identifies the driver to use with the device
+ * @dev_addr: the device's address on the bus.
+ *
+ * This macro initializes essential fields of a struct i2c_board_info,
+ * declaring what has been provided on a particular board.  Optional
+ * fields (such as the chip type, its associated irq, or device-specific
+ * platform_data) are provided using conventional syntax.
+ */
+#define I2C_BOARD_INFO(driver,dev_addr) \
+        .driver_name = (driver), .addr = (dev_addr)
+
+
+/* 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.
+ */
+extern struct i2c_client *
+i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info);
+
+/* If you don't know the exact address of an I2C device, use this variant
+ * instead, which can probe for device presence in a list of possible
+ * addresses.
+ */
+extern struct i2c_client *
+i2c_new_probed_device(struct i2c_adapter *adap,
+                      struct i2c_board_info *info,
+                      unsigned short const *addr_list);
+
+extern void i2c_unregister_device(struct i2c_client *);
+
+/* Mainboard arch_initcall() code should register all its I2C devices.
+ * This is done at arch_initcall time, before declaring any i2c adapters.
+ * Modules for add-on boards must use other calls.
+ */
+extern int
+i2c_register_board_info(int busnum, struct i2c_board_info const *info, unsigned n);
+
+
 /*
  * The following structs are for those who like to implement new bus drivers:
  * i2c_algorithm is the interface to a class of hardware solutions which can
@@ -228,17 +312,14 @@ struct i2c_adapter {
         int timeout;
         int retries;
         struct device dev;              /* the adapter device */
-        struct class_device class_dev;  /* the class device */
 
         int nr;
         struct list_head clients;
         struct list_head list;
-        char name[I2C_NAME_SIZE];
+        char name[48];
         struct completion dev_released;
-        struct completion class_dev_released;
 };
-#define dev_to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev)
-#define class_dev_to_i2c_adapter(d) container_of(d, struct i2c_adapter, class_dev)
+#define to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev)
 
 static inline void *i2c_get_adapdata (struct i2c_adapter *dev)
 {
@@ -290,9 +371,10 @@ struct i2c_client_address_data {
  */
 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 *);
 
 extern int i2c_register_driver(struct module *, struct i2c_driver *);
-extern int i2c_del_driver(struct i2c_driver *);
+extern void i2c_del_driver(struct i2c_driver *);
 
 static inline int i2c_add_driver(struct i2c_driver *driver)
 {
@@ -365,6 +447,7 @@ struct i2c_msg {
 #define I2C_M_REV_DIR_ADDR      0x2000
 #define I2C_M_IGNORE_NAK        0x1000
 #define I2C_M_NO_RD_ACK         0x0800
+#define I2C_M_RECV_LEN          0x0400 /* length will be first received byte */
         __u16 len;              /* msg length                           */
         __u8 *buf;              /* pointer to msg data                  */
 };