On Tue, 6 Nov 2007 11:26:14 -0700, Grant Likely wrote: > On 11/6/07, Jean Delvare <[EMAIL PROTECTED]> wrote: > > Sorry, I've not been completely clear. Yes, you can use > > i2c_new_device() on an adapter that has been added with > > i2c_add_adapter(). However, this requires that you have a reference to > > that i2c_adapter, which is usually not the case with system-wide I2C > > buses. Embedded platforms would rather use i2c_add_numbered_adapter(), > > give a list of chips to i2c_register_board_info() and let i2c-core > > instantiate them. i2c_new_device was primarily meant for multimedia > > adapters. > > *Some* embedded platforms would rather use i2c_add_numbered_adapter(). :-) > > On powerpc, and other platforms which have a device tree, we don't > need to define a table of devices in the platform code because we've > already got a rich structure for describing such things. The i2c > busses and i2c devices are grouped together in the device tree, so > when the i2c bus is probed, it should call out to common i2c device > tree parsing code to instantiate all the devices described in the > tree. > > It would be awkward to describe the i2c bus in the device tree but > still have to use a static structure to describe the devices on that > bus.
Ah, OK, thanks for the clarification. Then indeed using i2c_add_adapter() will work fine, agreed. -- Jean Delvare _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
