Hello Alexander: * Povolotsky, Alexander <Alexander.Povolotsky at marconi.com> [2004-12-18 10:57:38 -0500]: > Hi Mark, Not sure why you're writing me privately... > I have FreeScale (Motorola) 8xx custom board with single 24C02 I2C EEPROM, > connected to the I2C bus. > > Building Linux (latest and greatest ;-) ) 2.6.10-rc3 FAILS for 8xx with I2C > config enabled - see attached below - > but it works in Linux 2.4 . > > So I want to try to port 8xx i2c bus driver code from the 2.4.26 (which > works !) to Linux 2.6 ... > > In Linux 2.6 distribution I see: > > .../drivers/i2c/busses and .../drivers/i2c/algos > > I do not see the same subdirectories in the Linux 2.4 distribution ... > > Is there any documentation (or may be you could kindly explain to me) > what was the idea behind reorganizing drivers sub-directories between 2.4 > and 2.6 ? > It looks like those changes are beyond simply 'cosmetic' improvements ? - am > I correct ? AFAIK, the directory org was just cosmetic. > - I would highly appreciate this answer, since it would help me to attempt > to try make it work in 2.6 ! If you haven't already, take a look here for documentation: http://secure.netroedge.com/~lm78/docs.html And if you have any more questions, please send them to the sensors mailing list which I've CC'ed. BTW: there's no need to subscribe, the list is open. > -----Original Message----- > From: Jean Delvare [mailto:khali at linux-fr.org] > Sent: Tuesday, December 14, 2004 4:38 AM > To: Alexander.Povolotsky at marconi.com; greg at kroah.com > Subject: Re: 8xx i2c drivers (cross)compilation errors on Linux 2.6.8 > > On 2004-12-14, Alexander Povolotsky wrote: > > > Hi, > > > > I have the following .config setup: > > (...) > > CONFIG_I2C_RPXLITE=y > > (...) > > > > Originally I was getting error: > > CC drivers/i2c/busses/i2c-rpx.o > > drivers/i2c/busses/i2c-rpx.c:20:32: linux/i2c-algo-8xx.h: No such file or > > directory - why I am missing it - any hint ? > > Hm, looks like the 8xx i2c algorithm was never ported to Linux 2.6. Greg, > how come that the RPX adapter driver is present in the tree and the > algorithm it depends on isn't? > > > So I copied the i2c-algo-8xx.h file from Linux 2.4.26 distribution ... > > could I use it ? > > (if not - could you send me the correct i2c-algo-8xx.h file ? - TIA !) > > I don't think it'll work. The header file is one thing, the algorithm > driver is another and you would need to port both (they proabbly won't > work out of the box due to important changes in the i2c subsystem > between 2.4 and 2.6 kernels). Also, obviously the RPX adapter driver > couldn't be used so far so it was possibly never tested. There will > probably be much porting and debugging work if you want to get it to > work. > > Greg, could it be that an arch-specific (m68k? don't know what this > rpx/8xx thing is) variant of the Linux tree already has the i2c-algo-8xx > driver ported to 2.6? We probably want to import it into the main tree > if this is the case (having adapter drivers that won't compile doesn't > sound good...) > > Alexander, at any rate, there's not much I can do myself, as I don't > have compatible hardware to port/test/debug the i2c-algo-8xx and i2c-rpx > drivers. Sorry. Regards, -- Mark M. Hoffman mhoffman at lightlink.com
