On 11 July 2018 at 06:59, Eddie James <eajames@xxxxxxxxxxxxxxxxxx> wrote: > > > On 07/10/2018 02:39 PM, Wolfram Sang wrote: >>> >>> Sorry, what do you mean "show up as"? Yes, we could first shift all our >>> addresses in user-space before passing them to the driver, so that the >>> msg->addr field is exactly what the hardware expects already... This >>> would >>> be non-trivial for our users considering all our documentation represents >>> the addresses as the top 7 bits of a byte :( >> >> Ah, now I understand the whole situation! Good that I asked. But I have >> bad news for you: >> >> msg->addr is 7 bit and LSB aligned. No way around that. This is how >> Linux I2C worked since the beginning. You have to adapt to it. >> >> I know what you mean. Most doumentation I get has the addresses in 8 >> bit, i.e. 7 bit address shifted + RW bit. But sorry again, the Linux >> representation is different and all drivers have to adhere to that. >> >> An EEPROM ist at 0x50 in Linux. There is no write addr 0xa0 and read >> addr 0xa1. > > > OK, I understand! Will test and resend with conforming addressing. Thanks > for all the feedback! Nice one Wolfram. I wondered why the standard tools didn't work, but hadn't gotten around to working out what was going on. Thanks for taking a close look. Cheers, Joel
