On Sun, Dec 21, 2003 at 01:07:32PM +0100, Jean Delvare wrote: > > > BTW, does i2cdetect work on non-i386 architectures? > > > > Its pretty straight-forward. If it doesn't work, problem is more > > likely in i2c-dev. > > That's not how I meant it. My point is that I think I remember Greg > saying someting about i2c-dev not being portable cross platforms. If I'm > not mistaking, i2cdetect relies on i2c-dev. What I mean is that removing > in-modules bus scanning might not be accepted if the architectures using > these modules are not able to use the new and prefered method, i.e. > i2cdetect. > > I searched my mail archive for Greg's original comment, but couldn't > find it. Greg, any chance you could refresh my memory? For systems that have a 64bit kernel, and a 32bit userspace, all ioctls in the kernel need a "thunking" layer in order to pass the data between the kernel and userspace properly. Last I looked that layer did not contain any i2c ioctls, so i2c-dev will not work on those kinds of systems (ppc64, sparc64, mips64, amd64, ia64, etc...) Hope this helps, greg k-h
