On 11/5/10 12:19 AM, Bao, Zheng wrote: > According to the description in datasheet of f71889, > > "To enable configuration, the entry key 0x87 must be written to > the index port" > > " > -o 4e 87 > -o 4e 87 (enable configuration) > -o 4e aa (disable configuration) > " > This piece of text appears in most of the datasheet of fintek superio. > It doesnt say it quite clear, but it seems that the 0x87 should > be written twice. I tried on f81865, which is not in the coreboot tree > yet. If the 0x87 is only written once, you can only R/W the index/data > port once. All the subsequent RW will fail. Writing twice will be ok. > > Plus, in the superiotool, the function > enter_conf_mode_winbond_fintek_ite_8787 > also write 8787. > > The fintek superio chips seem to enable the UART automatically when the > power is on. So I didnt find it failed to access. > > Signed-off-by: Zheng Bao <[email protected]> Acked-by: Stefan Reinauer <[email protected]>
Stefan -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
