Hi Xubin, (Note: This is not ELDK related and should have been posted to the U-Boot list. Nevertheless answer below)
On Thursday 20 October 2011 14:50:21 噜斯卡 孙 wrote: > I try to make the kilauea(ppc405ex) work in 600MHz(cpu frequency). But > it looks like there is no use by setting "CPU Frequency scaling" in linux > "make menuconfig".How can I set it successful, in linux or in u-boot? > Could you point me a way to do this? My ppc405ex supported 600MHz. This needs to be done in U-Boot. You can change the frequencies (if the board is correctly configured to use the I2C boostrap EEPROM value, which is default for Kilauea) by using the "chip_config" U-Boot command. I suggest you give it a try: => ? chip_config chip_config - program the I2C bootstrap EEPROM Usage: chip_config [config-label] => chip_config Available configurations (I2C address 0x52): 333-nor - NOR CPU: 333 PLB: 166 OPB: 83 EBC: 83 400-133-nor - NOR CPU: 400 PLB: 133 OPB: 66 EBC: 66 400-nor - NOR CPU: 400 PLB: 200 OPB: 100 EBC: 100 533-nor - NOR CPU: 533 PLB: 177 OPB: 88 EBC: 88 533-nand - NOR CPU: 533 PLB: 177 OPB: 88 EBC: 88 600-nor - NOR CPU: 600 PLB: 200 OPB: 100 EBC: 100 *** 600-nand - NOR CPU: 600 PLB: 200 OPB: 100 EBC: 100 666-nor - NOR CPU: 666 PLB: 222 OPB: 111 EBC: 111 => chip_config 600-nor Using configuration: 600-nor - NOR CPU: 600 PLB: 200 OPB: 100 EBC: 100 done (dump via 'i2c md 52 0.1 10') Reset the board for the changes to take effect Best regards, Stefan -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-0 Fax: (+49)-8142-66989-80 Email: [email protected] _______________________________________________ eldk mailing list [email protected] http://lists.denx.de/mailman/listinfo/eldk
