On Tue, Nov 19, 2013 at 06:14:18PM -0800, Benson Leung wrote: > Hi Wolfram, > > On Thu, Nov 14, 2013 at 10:05 AM, Wolfram Sang <wsa@xxxxxxxxxxxxx> wrote: > >> In the chromeos_laptop driver, I do by-name matching of i2c busses to > >> find busses and instantiate devices, so there is value to have each > >> named something predictable. > > > > Any why don't you use fixed bus numbers which you can attach the devices > > to? > > On this particular set of systems, there are two other classes of i2c > adapters that use dynamically assigned bus numbers, specifically the > i915 gmbus adapters, and the i801_smbus adapter. This is why > chromeos_laptop uses the name matching, as some of the boards that it > supports have devices on those dynamic busses. I am not sure I get the problem. If you use i2c_register_board_info() to register the known devices on the designware busses the dynamically assigned numbers are guaranteed to be enumarated higer than the static ones. Check drivers/i2c/i2c-boardinfo.c. Regards, Wolfram
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