linux-kernel - Re: [PATCH] i2c: core: helper function to detect slave mode

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Message-ID: <CAHp75Ve87TE3y6hg1bMxSFAPVcY3wPifGuvtpXNhBw5-eOnPrg@mail.gmail.com>
Date:   Sat, 7 Jan 2017 00:45:51 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Vladimir Zapolskiy <vz@...ia.com>
Cc:     Luis Oliveira <Luis.Oliveira@...opsys.com>,
        Wolfram Sang <wsa@...-dreams.de>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        linux-i2c@...r.kernel.org, devicetree <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Ramiro.Oliveira@...opsys.com, Joao Pinto <Joao.Pinto@...opsys.com>,
        CARLOS.PALMINHA@...opsys.com
Subject: Re: [PATCH] i2c: core: helper function to detect slave mode

On Fri, Jan 6, 2017 at 11:46 PM, Vladimir Zapolskiy <vz@...ia.com> wrote:
>> +     if (IS_BUILTIN(CONFIG_OF) && dev->of_node) {
>
> IS_BUILTIN(CONFIG_OF) looks excessive, check for non-NULL dev->of_node
> should be sufficient.

Sorry, but you missed the point.
This will enable compile time optimization and basically be collapsed to no-op.

>> +             }
>> +     } else if (IS_BUILTIN(CONFIG_ACPI) && ACPI_HANDLE(dev)) {
>> +             dev_dbg(dev, "ACPI slave is not supported yet\n");
>> +     }
>
> If so, then it might be better to drop else-if stub for now.

Please, don't.

-- 
With Best Regards,
Andy Shevchenko