linux-kernel - Re: [PATCH 2/2] hwmon: add dt binding for max1619

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Message-ID: <CANk1AXQr1RzB9THosy+_8VPz4-GLzHSZYtGqf59S97aBThhaZA@mail.gmail.com>
Date:   Tue, 19 Sep 2017 13:11:22 -0500
From:   Alan Tull <atull@...nel.org>
To:     Rob Herring <robh@...nel.org>
Cc:     Guenter Roeck <linux@...ck-us.net>, linux-hwmon@...r.kernel.org,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Jean Delvare <jdelvare@...e.com>,
        Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH 2/2] hwmon: add dt binding for max1619

On Mon, Sep 18, 2017 at 4:11 PM, Rob Herring <robh@...nel.org> wrote:
> On Mon, Sep 11, 2017 at 12:58:57PM -0700, Guenter Roeck wrote:
>> On Mon, Sep 11, 2017 at 02:16:49PM -0500, Alan Tull wrote:
>> > Add new device tree binding for max1619.
>> >
>> > Signed-off-by: Alan Tull <atull@...nel.org>
>>
>> Technically that should already work, without explicit binding,
>> or did the i2c core change lately ?
>
> There was some work in that direction IIRC.

Yes, after Guenter replied I tried it without this patch and it
worked.  i2c drivers can have a 'detect' function that can check part
id, etc.  If detection succeeds, it will fill in the device name in
i2c_board_info->type and the i2c-core will enumerate using that.

Alan

>
> We don't really want to rely on that behavior and should have DT match
> strings.
>
> Rob