On Tue, Apr 04, 2017 at 07:18:27PM +0300, Viktor Krasnov wrote: > From: Edgar Cherkasov <echerkasov@xxxxxxxxxxxxx> > > Description of the problem: > - i2c-scmi driver contains only two identifiers "SMBUS01" and "SMBUSIBM"; > - the fist HID (SMBUS01) is clearly defined in "SMBus Control Method > Interface Specification, version 1.0": "Each device must specify > 'SMBUS01' as its _HID and use a unique _UID value"; > - unfortunately, BIOS vendors (like AMI) seem to ignore this requirement > and implement "SMB0001" HID instead of "SMBUS01"; > - I speculate that they do this because only "SMB0001" is hard coded in > Windows SMBus driver produced by Microsoft. > > This leads to following situation: > - SMBus works out of box in Windows but not in Linux; > - board vendors are forced to add correct "SMBUS01" HID to BIOS to make > SMBus work in Linux. Moreover the same board vendors complain that > tools (3-rd party ASL compiler) do not like the "SMBUS01" identifier > and produce errors. So they need to constantly patch the compiler for > each new version of BIOS. > > As it is very unlikely that BIOS vendors implement a correct HID in > future, I would propose to consider whether it is possible to work around > the problem by adding MS HID to the Linux i2c-scmi driver. > > v2: move the definition of the new HID to the driver itself. > > Signed-off-by: Edgar Cherkasov <echerkasov@xxxxxxxxxxxxx> > Signed-off-by: Michael Brunner <Michael.Brunner@xxxxxxxxxxx> > Acked-by: Viktor Krasnov <vkrasnov@xxxxxxxxxxxxx> Applied to for-next, thanks!
Attachment:
signature.asc
Description: PGP signature
