On Sun, 14 Feb 2016 09:39:39 +0100, fetzerch wrote: > 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 for testing, Christian, this is very helpful. -- Jean Delvare SUSE L3 Support -- 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
