> -----Original Message----- > From: Greg KH [mailto:gregkh@xxxxxxxxxxxxxxxxxxx] > Sent: Monday, September 12, 2016 10:41 AM > To: Vadim Pasternak <vadimp@xxxxxxxxxxxx> > Cc: tglx@xxxxxxxxxxxxx; mingo@xxxxxxxxxx; hpa@xxxxxxxxx; > davem@xxxxxxxxxxxxx; geert@xxxxxxxxxxxxxx; akpm@xxxxxxxxxxxxxxxxxxxx; > kvalo@xxxxxxxxxxxxxx; mchehab@xxxxxxxxxx; linux@xxxxxxxxxxxx; > x86@xxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; platform-driver- > x86@xxxxxxxxxxxxxxx; jiri@xxxxxxxxxxx > Subject: Re: [patch v1] x86/platform/mellanox: introduce support for Mellanox > systems platform > > On Mon, Sep 12, 2016 at 07:23:59AM +0000, Vadim Pasternak wrote: > > > > > > > -----Original Message----- > > > From: Greg KH [mailto:gregkh@xxxxxxxxxxxxxxxxxxx] > > > Sent: Monday, September 12, 2016 10:05 AM > > > To: Vadim Pasternak <vadimp@xxxxxxxxxxxx> > > > Cc: tglx@xxxxxxxxxxxxx; mingo@xxxxxxxxxx; hpa@xxxxxxxxx; > > > davem@xxxxxxxxxxxxx; geert@xxxxxxxxxxxxxx; > > > akpm@xxxxxxxxxxxxxxxxxxxx; kvalo@xxxxxxxxxxxxxx; mchehab@xxxxxxxxxx; > > > linux@xxxxxxxxxxxx; x86@xxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; > > > platform-driver- x86@xxxxxxxxxxxxxxx; jiri@xxxxxxxxxxx > > > Subject: Re: [patch v1] x86/platform/mellanox: introduce support for > > > Mellanox systems platform > > > > > > On Mon, Sep 12, 2016 at 06:44:03AM +0000, Vadim Pasternak wrote: > > > > > > > > > > > > > -----Original Message----- > > > > > From: Greg KH [mailto:gregkh@xxxxxxxxxxxxxxxxxxx] > > > > > Sent: Monday, September 12, 2016 9:13 AM > > > > > To: Vadim Pasternak <vadimp@xxxxxxxxxxxx> > > > > > Cc: tglx@xxxxxxxxxxxxx; mingo@xxxxxxxxxx; hpa@xxxxxxxxx; > > > > > davem@xxxxxxxxxxxxx; geert@xxxxxxxxxxxxxx; > > > > > akpm@xxxxxxxxxxxxxxxxxxxx; kvalo@xxxxxxxxxxxxxx; > > > > > mchehab@xxxxxxxxxx; linux@xxxxxxxxxxxx; x86@xxxxxxxxxx; > > > > > linux-kernel@xxxxxxxxxxxxxxx; > > > > > platform-driver- x86@xxxxxxxxxxxxxxx; jiri@xxxxxxxxxxx > > > > > Subject: Re: [patch v1] x86/platform/mellanox: introduce support > > > > > for Mellanox systems platform > > > > > > > > > > On Mon, Sep 12, 2016 at 06:29:58AM +0000, vadimp@xxxxxxxxxxxx > wrote: > > > > > > From: Vadim Pasternak <vadimp@xxxxxxxxxxxx> > > > > > > > > > > > > Enable system support for the Mellanox Technologies platform, > > > > > > which provides support for the next Mellanox basic systems: > > > > > > "msx6710", "msx6720", "msb7700", "msn2700", "msx1410", > > > > > > "msn2410", "msb7800", "msn2740", "msn2100" and also various > > > > > > number of derivative systems from the above basic types. > > > > > > > > > > What does "system support" mean? > > > > > > > > > > Why can't this just be a "normal" PCI driver, as you are just > > > > > accessing a PCI device and doing something with it, seems odd to > > > > > claim it is a > > > "platform" driver. > > > > > > > > > > > > > This driver also activates probes to create i2c platform driver and muxes. > > > > > > And how does it do that? Through the PCI device? > > > > > > > For ARM and PPC based systems I can activate such stuff through dts. > > > > To be honest I don't know what is the right way to do such things > > > > for > > > > x86 systems. > > > > > > How is it found in a x86 system, in ACPI? > > > > > > > We have no support in ACPI. > > Currently it could be found through DMI. > > > > > > If I will move PCI related stuff to separate driver, could you > > > > suggest some right location for that? > > > > > > Depends on what it does. > > > > It creates platform i2c driver (Mellanox controller), like: > > platform_device_register_simple("i2c_mlxcpld", -1, > > NULL, 0); And > > two mux platform device instances, like: > > platform_device_register_resndata(dev, > > " i2c-mux-reg", i, NULL, > > 0, &mlxplat_mux_data[i], > > > > sizeof(mlxplat_mux_data[i])); > > Ugh. Really? These aren't on a real bus? What is this, the 1990's? Actually this is 2015-2016. Many switches use i2c virtual buses infrastructure for placing slow devices for system monitoring and control. > > Ok, a DMI driver for these makes sense in the platform directory to me, but you > have to convince the maintainer of this subsystem :) > > And rip all of that PCI stuff out, that belongs in a PCI driver. > Thank you very much for all your inputs. > thanks, > > greg k-h Thanks, Vadim. -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
