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| author | Jean Delvare <khali@linux-fr.org> | 2007-05-01 23:26:31 +0200 |
|---|---|---|
| committer | Jean Delvare <khali@hyperion.delvare> | 2007-05-01 23:26:31 +0200 |
| commit | 12b5053ac58709c7d475888bc18d1f61958afc4e (patch) | |
| tree | 13a6afc6ad6d3f22568045ba71277c1331fd4283 /include/linux/i2c.h | |
| parent | 0f3b48385213355a2d4408bec1b481ffcf0e8638 (diff) | |
| download | linux-3.10-12b5053ac58709c7d475888bc18d1f61958afc4e.tar.gz linux-3.10-12b5053ac58709c7d475888bc18d1f61958afc4e.tar.bz2 linux-3.10-12b5053ac58709c7d475888bc18d1f61958afc4e.zip | |
i2c: Add i2c_new_probed_device()
Add a new helper function to instantiate an i2c device. It is meant as a
replacement for i2c_new_device() when you don't know for sure at which
address your I2C/SMBus device lives. This happens frequently on TV
adapters for example, you know there is a tuner chip on the bus, but
depending on the exact board model and revision, it can live at different
addresses. So, the new i2c_new_probed_device() function will probe the bus
according to a list of addresses, and as soon as one of these addresses
responds, it will call i2c_new_device() on that one address.
This function will make it possible to port the old i2c drivers to the
new model quickly.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'include/linux/i2c.h')
| -rw-r--r-- | include/linux/i2c.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/i2c.h b/include/linux/i2c.h index 36d6814a6df..da95ce79d07 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -245,6 +245,15 @@ struct i2c_board_info { 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. |