title: Beagle Bone Black swapped I2C busses
body: <p>We are developing extension board for BBB. It contains I2C RTC clock chip MCP79412. Chip is connected to I2C1 (pins P9.17,P9.18). I can't see any device on i2c-1, but I found chip EEPROM on i2c-2. When I connect it to I2C2 (P9.19,P9.20) I can access eeprom using capemgr loaded driver on bus i2c-1. </p>
  
  <p>It looks like something swaped busses 1 and 2. I'm using Arch Linux with Kernel 3.8.13-35.</p>
  
  <p>My uEnv.txt</p>
  
  <pre><code>optargs=loglevel=3 coherent_pool=1M capemgr.enable_partno=BB-UART1,BB-UART2,BB-UART4,BB-I2C1,BB-ADC
  </code></pre>
  
  <p>What could cause this strange behavior?</p>