linux-kernel - RE: [patch v1] x86/platform/mellanox: introduce support for Mellanox systems platform

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Date:   Mon, 12 Sep 2016 06:44:03 +0000
From:   Vadim Pasternak <vadimp@...lanox.com>
To:     Greg KH <gregkh@...uxfoundation.org>
CC:     "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "hpa@...or.com" <hpa@...or.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "geert@...ux-m68k.org" <geert@...ux-m68k.org>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "kvalo@...eaurora.org" <kvalo@...eaurora.org>,
        "mchehab@...nel.org" <mchehab@...nel.org>,
        "linux@...ck-us.net" <linux@...ck-us.net>,
        "x86@...nel.org" <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "platform-driver-x86@...r.kernel.org" 
        <platform-driver-x86@...r.kernel.org>,
        "jiri@...nulli.us" <jiri@...nulli.us>
Subject: RE: [patch v1] x86/platform/mellanox: introduce support for Mellanox
 systems platform



> -----Original Message-----
> From: Greg KH [mailto:gregkh@...uxfoundation.org]
> Sent: Monday, September 12, 2016 9:13 AM
> To: Vadim Pasternak <vadimp@...lanox.com>
> Cc: tglx@...utronix.de; mingo@...hat.com; hpa@...or.com;
> davem@...emloft.net; geert@...ux-m68k.org; akpm@...ux-foundation.org;
> kvalo@...eaurora.org; mchehab@...nel.org; linux@...ck-us.net;
> x86@...nel.org; linux-kernel@...r.kernel.org; platform-driver-
> x86@...r.kernel.org; jiri@...nulli.us
> Subject: Re: [patch v1] x86/platform/mellanox: introduce support for Mellanox
> systems platform
> 
> On Mon, Sep 12, 2016 at 06:29:58AM +0000, vadimp@...lanox.com wrote:
> > From: Vadim Pasternak <vadimp@...lanox.com>
> >
> > 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.
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.
If I will move PCI related stuff to separate driver, could you suggest some right location for that?

For example, could I have the code like in f.e. in arch/x86/platform/ts5500/ts5500.c as a platform initialization code? 

Thanks,
Vadim.

> thanks,
> 
> greg k-h