linux-kernel - Re: [PATCH] i2c: i801: Register optional lis3lv02d i2c device on Dell machines

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Message-ID: <20170104220030.GD40341@dtor-ws>
Date:   Wed, 4 Jan 2017 14:00:30 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Wolfram Sang <wsa@...-dreams.de>
Cc:     Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        Pali Rohár <pali.rohar@...il.com>,
        Michał Kępień <kernel@...pniu.pl>,
        Jean Delvare <jdelvare@...e.com>,
        Steven Honeyman <stevenhoneyman@...il.com>,
        Valdis.Kletnieks@...edu,
        Jochen Eisinger <jochen@...guin-breeder.org>,
        Gabriele Mazzotta <gabriele.mzt@...il.com>,
        Andy Lutomirski <luto@...nel.org>, Mario_Limonciello@...l.com,
        Alex Hung <alex.hung@...onical.com>,
        Takashi Iwai <tiwai@...e.de>, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH] i2c: i801: Register optional lis3lv02d i2c device on
 Dell machines

On Wed, Jan 04, 2017 at 10:55:47PM +0100, Wolfram Sang wrote:
> 
> > From e362a0277fd1bd6112f258664d8831d9bc6b78da Mon Sep 17 00:00:00 2001
> > From: Dmitry Torokhov <dmitry.torokhov@...il.com>
> > Date: Wed, 4 Jan 2017 09:33:43 -0800
> > Subject: [PATCH] i2c: do not enable fall back to Host Notify by default
> > 
> > Falling back unconditionally to HostNotify as primary client's interrupt
> > breaks some drivers which alter their functionality depending on whether
> > interrupt is present or not, so let's introduce a board flag telling I2C
> > core explicitly if we want wired interrupt or HostNotify-based one:
> > I2C_CLIENT_HOST_NOTIFY.
> > 
> > For DT-based systems we introduce "host-notofy" property that we convert
> > to I2C_CLIENT_HOST_NOTIFY board flag.
> > 
> > Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
> 
> Yay, this looks better to me. One nit:
> 
> > +Alternatively, devices supporting SMbus Host Notify, and connected to
> > +adapters that support this feature, may use "host-notify" property. I2C
> > +core will create a virtual interrupt for Host Notify and assign it as
> > +primary interrupt for the slave.
> 
> This paragraph sounds Linux-ish while binding docs should be OS
> agnostic. Maybe we can shorten the second sentence to "It will be
> assigned then as the primary interrupt for the slave."?

Heh, I just sent out patch to DT folks. Provided that they are fine with
the new property I can either send V2 or you could edit when applying,
whatever is easier for you.

Thanks.

-- 
Dmitry