Hi, I'm currently trying to use the SMBus on a congatec BayTrail board. This works just fine when booting via the original BIOS. But when I boot into Linux using U-Boot as bootloader, I get the following errors: [ 81.877121] i801_smbus 0000:00:1f.3: Transaction timeout [ 81.879228] i801_smbus 0000:00:1f.3: Failed terminating the transaction [ 81.879320] i801_smbus 0000:00:1f.3: SMBus is busy, can't use it! [ 81.879373] i801_smbus 0000:00:1f.3: SMBus is busy, can't use it! [ 81.879421] i801_smbus 0000:00:1f.3: SMBus is busy, can't use it! [ 81.879496] i801_smbus 0000:00:1f.3: SMBus is busy, can't use it! ... I checked with an oscilloscope and the SMBus clock is not toggling at all in this case. My feeling is, that some basic setup is missing in this non-BIOS case. Like some clock enabling. Does anyone of you have some idea here? Thanks, Stefan -- 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
