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

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Message-ID: <20170104063642.GA20545@dtor-ws>
Date:   Tue, 3 Jan 2017 22:36:42 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Benjamin Tissoires <benjamin.tissoires@...hat.com>
Cc:     Pali Rohár <pali.rohar@...il.com>,
        Michał Kępień <kernel@...pniu.pl>,
        Jean Delvare <jdelvare@...e.com>,
        Wolfram Sang <wsa@...-dreams.de>,
        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 Tue, Jan 03, 2017 at 10:29:34PM +0100, Benjamin Tissoires wrote:
> On Jan 03 2017 or thereabouts, Dmitry Torokhov wrote:
>
> > Yet another option: can we add a new flag to i2c_board_info controlling
> > whether we want to enable/disable wiring up host notify interrupt?
> 
> That should be fairly easy to implement. For now, given that only Elan
> and Synaptics are the one in need for Host Notify, it could be better to
> request the Host Notify IRQ instead of disabling it unconditionally
> (which would make the current yet 8 years old lis3lv02d driver happy
> again).

I like that we have it done in i2c core instead of having drivers
implementing it individually. Since you are saying that handling host
notify is property of the slave/driver maybe we should be adding a flag
to the *i2c_driver* structure to let i2c core that we want to have host
notify mapped as interrupt if "native" interrupt is not supplied by the
platform code?

Thanks.

-- 
Dmitry