Hi Jean, On 13.02.2016 22:51, Jean Delvare wrote: > Hi Wolfram, > > On Fri, 12 Feb 2016 20:27:20 +0100, Wolfram Sang wrote: >> On Fri, Jan 29, 2016 at 10:44:52AM +0100, Jean Delvare wrote: >>> The SB800 register reference guide says that the SMBus port selection >>> bits may not always be in register Smbus0En (0x2c) but could >>> alternatively be found in register Smbus0Sel (0x2e) depending on the >>> settings in register Smbus0SelEn (0x2f.) Add support for this >>> configuration. >> >> Were you able to test both cases? > > I don't have the hardware myself so I was not able to test any case. > I was hoping Christian would test. This is the reason why I am logging > which register is used, so that we know if the alternative setting is > ever used. I found the potential problem by looking at the datasheet, > it's not something that has been reported (yet.) > > Meanwhile I have found a datasheet for device 780Bh (named Bolton FCH > on AMD's web site, but Hudson2 in our driver) which suggest that the > "alternative" setting is the only possible one on this chipset. The > register used to figure out the setting is marked as reserved. If the > register exists still and the relevant bit is set, then my patch should > work. If not then a better patch will be needed. > > I'll try to gain access to a system with a Bolton FCH and experiment > with it. > > Then there's the most recent device, codenamed "CZ", for which I have > no information at all. > sorry for the late response. This time it slipped through on my side. The sensors command still works fine without any noticable change. Here is the output: [1894808.057493] piix4_smbus 0000:00:14.0: SMBus Host Controller at 0xb00, revision 0 [1894808.057504] piix4_smbus 0000:00:14.0: Using register 0x2c for SMBus port selection [1894808.394960] i2c i2c-1: Found w83795adg rev. B at 0x2f [1894808.666968] piix4_smbus 0000:00:14.0: Auxiliary SMBus Host Controller at 0xb20 Thanks, Christian -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
