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i2c: Add driver suspend/resume/shutdown support

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Driver model updates for the I2C core:

 - Add new suspend(), resume(), and shutdown() methods.  Use them in the
   standard driver model style; document them.

 - Minor doc updates to highlight zero-initialized fields in drivers, and
   the driver model accessors for "clientdata".

If any i2c drivers were previously using the old suspend/resume calls
in "struct driver", they were getting warning messages ... and will
now no longer work.  Other than that, this patch changes no behaviors;
and it lets I2C drivers use conventional PM and shutdown support.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
David Brownell 2007-02-13 22:09:00 +01:00 • committed by Jean Delvare
parent b8d6f45b32
commit f37dd80ac2
4 changed files with 108 additions and 34 deletions
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7
include/linux/i2c.h
View file

@ -125,7 +125,12 @@ struct i2c_driver {
* it must be freed here.
*/
int (*detach_client)(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);
int (*resume)(struct i2c_client *);
/* a ioctl like command that can be used to perform specific functions
* with the device.
*/