I'm using a 2.6.23.17 kernel for sh4 architecture. I have to write a driver for an i2c controled audio chip. You are totally right...I was mixing register adresses with device adresses...the only adress I have to use is 0x71 on i2c-0 -----Original Message----- From: linux-i2c-owner@xxxxxxxxxxxxxxx [mailto:linux-i2c-owner@xxxxxxxxxxxxxxx] On Behalf Of Jean Delvare Sent: Tuesday, March 10, 2009 4:31 PM To: Ayman KHAMOUMA Cc: linux-i2c@xxxxxxxxxxxxxxx Subject: Re: Need help on selecting one (and only one) i2c bus Hi Ayman, On Mon, 9 Mar 2009 15:52:56 +0100, Ayman KHAMOUMA wrote: > I'm new on I2C device drivers programming and I'm facing a little problem, I can't find how to select my i2c-0 bus (I have 3 of them: i2c-0, i2c-1 and i2c-2) I'd like my probe function to probe only this bus and ignore the others. > I guess I can find the solution with the i2c_address_data structure, but I don't really understand how to use it... It would help if you would first tell us what kernel version you are using, what device you are writing a driver for, and what architecture / system type this is all working on. > Do I have to use the ignore_range array ? ignore_range has gone away long ago. The last kernel that had it was 2.6.12.6, released in late August 2005. Are really you using such an old kernel? > Once filed, I have nothing to do ? > > The device I want to probe/send data to is located on bus i2c-0 and at > the adresses 0x00 to 0x15 I seriously doubt this. Addresses 0x00, 0x01 and 0x02 are very special for I2C, no device can use them. I suspect you are mixing register addresses (the map of which is internal and specific to each device) with device addresses on the bus. > I guess I have to do: > static unsigned short ignore_range[] = { 0x00, 0x16, 0xff, 0x01, 0x00, > 0xff, 0x02, 0x00, 0xff, I2C_CLIENT_END }; > > Am I right ? No, this is seriously wrong. But I can't tell more without additional information about what you are trying to achieve in the first place. -- Jean Delvare -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
