linux-kernel - RE: [PATCH v3 6/7] platform/mellanox: Introduce support for Mellanox register access driver

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Message-ID: <HE1PR0502MB375324E5F279A2733339365FA26F0@HE1PR0502MB3753.eurprd05.prod.outlook.com>
Date:   Sun, 27 May 2018 15:22:06 +0000
From:   Vadim Pasternak <vadimp@...lanox.com>
To:     Greg KH <gregkh@...uxfoundation.org>
CC:     "dvhart@...radead.org" <dvhart@...radead.org>,
        "andy.shevchenko@...il.com" <andy.shevchenko@...il.com>,
        "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>,
        Michael Shych <michaelsh@...lanox.com>,
        "ivecera@...hat.com" <ivecera@...hat.com>
Subject: RE: [PATCH v3 6/7] platform/mellanox: Introduce support for Mellanox
 register access driver



> -----Original Message-----
> From: Greg KH [mailto:gregkh@...uxfoundation.org]
> Sent: Sunday, May 27, 2018 6:14 PM
> To: Vadim Pasternak <vadimp@...lanox.com>
> Cc: dvhart@...radead.org; andy.shevchenko@...il.com; linux-
> kernel@...r.kernel.org; platform-driver-x86@...r.kernel.org; jiri@...nulli.us;
> Michael Shych <michaelsh@...lanox.com>; ivecera@...hat.com
> Subject: Re: [PATCH v3 6/7] platform/mellanox: Introduce support for Mellanox
> register access driver
> 
> On Sun, May 27, 2018 at 04:47:43PM +0000, Vadim Pasternak wrote:
> > Introduce new Mellanox platform driver to allow access to Mellanox
> > programmable device register space trough sysfs interface.
> > The driver purpose is to provide sysfs interface for user space for
> > the registers essential for system control and monitoring.
> > The sets of registers for sysfs access are supposed to be defined per
> > system type bases and include the registers related to system resets
> > operation, system reset causes monitoring and some kinds of mux selection.
> >
> > Signed-off-by: Vadim Pasternak <vadimp@...lanox.com>
> > ---
> > v1->v2:
> >  Changed added by Vadim:
> >  - Change ---help--- to help in Kconfig, according to new
> > requirements;
> > v2->v3:
> >  Comments pointed out by Darren:
> >  - Remove conditional assignment per attribute mode type, because mode
> >    will guard against not permitted access.
> >    Verified by Vadim.
> > ---
> >  drivers/platform/mellanox/Kconfig     |  11 ++
> >  drivers/platform/mellanox/Makefile    |   1 +
> >  drivers/platform/mellanox/mlxreg-io.c | 203
> > ++++++++++++++++++++++++++++++++++
> >  3 files changed, 215 insertions(+)
> >  create mode 100644 drivers/platform/mellanox/mlxreg-io.c
> >
> > diff --git a/drivers/platform/mellanox/Kconfig
> > b/drivers/platform/mellanox/Kconfig
> > index 591bccd..ddfae9fc 100644
> > --- a/drivers/platform/mellanox/Kconfig
> > +++ b/drivers/platform/mellanox/Kconfig
> > @@ -23,4 +23,15 @@ config MLXREG_HOTPLUG
> >  	  This driver handles hot-plug events for the power suppliers, power
> >  	  cables and fans on the wide range Mellanox IB and Ethernet systems.
> >
> > +config MLXREG_IO
> > +	tristate "Mellanox platform register access driver support"
> > +	depends on REGMAP
> > +	depends on HWMON
> > +	help
> > +	  This driver allows access to Mellanox programmable device register
> > +	  space trough sysfs interface. The sets of registers for sysfs access
> > +	  are defined per system type bases and includes the registers related
> > +	  to system resets operation, system reset causes monitoring and some
> > +	  kinds of mux selection.
> 
> No Documentation/ABI/ entries for these new sysfs files?  Not good :(
> 

Thanks Greg for your comment.

Should I call doc file like:
Documentation/ABI/stable/sysfs-driver-mlxreg-io
?

> greg k-h