I have found the app note (AN4173) that addresses customization of U-Boot for the i.MX51. Is there a similar app note for the MPC8308 or the Power QUICC family of devices? I am looking for some help in modifying U-Boot for some customized hardware.
I am not aware of that kind of document, there are two FTF presentation with the document number "FTF12-NET-F0180" and "FTF11-NET-F0399", they are talking about QorIQ P5 Processor, "Overcome the Challenges in Porting U-Boot and Linux OS", maybe your can refer to. The two presentation could be download from www.freescale.com.