In message 420B8EFE.7010301@web.de you wrote:
Well, I wanted to compile u-boot with i2c support.
For which board? Which architecture?
So I just added an #include <i2c.h> in to my boards board.c, put #define
Why would you need this?
CFG_HARD_I2C in the include-file and thought that'd be enough.
Why do you want to use CFG_HARD_I2C? Soft-I2C is much easier.
Well... apparently that's not enough as compiling (make distclean done before) stops in the linking process with a lot of complaints like this:
...
undefined reference to `i2c_read'
Maybe there is no hardware I2C implementation for your processor?
So... any suggestions where to add some references so it find all the stuff? I tried to figure out what other boards that use i2c do, but couldn't find any hints that I missed some Makefile or config, got lost in the build-system.
You only have to compare the board config files. No other changes are needed. Again, I recommend to use soft-i2c instead. There is zero advantages with hard-i2c, just a lot of trouble.
Best regards,
Wolfgang Denk