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

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Date:   Wed, 4 Jan 2017 10:45:08 +0100
From:   Jean Delvare <jdelvare@...e.de>
To:     Wolfram Sang <wsa@...-dreams.de>
Cc:     Pali Rohár <pali.rohar@...il.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>,
        kernel@...pniu.pl, 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, 28 Dec 2016 15:02:52 +0100, Wolfram Sang wrote:
> On Tue, Dec 27, 2016 at 02:51:01PM +0100, Pali Rohár wrote:
> > i2c_new_device() with lis3lv02d for i801 i2c bus needs to be called
> > after initializing i2c-i801 bus driver.
> >
> > I have no idea how to do it (properly) outside of i2c-i801.c file.
> 
> I once used bus_notifiers to achieve something similar. You could check
> arch/arm/mach-shmobile/regulator-quirk-rcar-gen2.c to see an action
> triggered once a client device got added, but you could act on another
> action like BUS_NOTIFY_BOUND_DRIVER. I used exactly that, too, somewhen
> somewhere.  Haven't checked if that helps here, too. And since we have 
> a
> precedence (Fujitsu case), I'll leave it to Jean who is the maintainer
> of this driver.

I don't have a strong opinion on the matter, whatever works is fine
with me.

-- 
Jean Delvare
SUSE L3 Support