linux-kernel - Re: [PATCH] platform/x86: intel_cht_int33fe: Work around BIOS bug on some devices

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Message-ID: <CAHp75Vdityzx+fzU_q0vULGpT3ww8C0_D0fYtEW77Hyh1yTX6A@mail.gmail.com>
Date:   Mon, 14 Aug 2017 23:45:13 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andy@...radead.org>,
        Platform Driver <platform-driver-x86@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] platform/x86: intel_cht_int33fe: Work around BIOS bug on
 some devices

On Mon, Aug 14, 2017 at 11:14 PM, Hans de Goede <hdegoede@...hat.com> wrote:
> At least one BIOS enumerates the max17047 both through the INT33FE ACPI
> device (it is right there in the resources table) as well as through a
> separate MAX17047 device.
>
> This commit checks for the max17047 already being enumerated through
> a separate MAX17047 ACPI device and if so it uses the i2c-client
> instantiated for this and attaches the device-props for the max17047 to
> that i2c-client.

> +int cht_int33fe_check_for_max17047(struct device *dev, void *data)
> +{
> +       const char *name = dev_name(dev);
> +       struct i2c_client **max17047 = data;
> +
> +       if (name && strcmp(name, "i2c-MAX17047:00") == 0) {

Can we stop using bad practice of comparing against _instance_?
If device is suppose to be single in the system, wouldn't _HID be enough?

> +               *max17047 = to_i2c_client(dev);
> +               return 1;
> +       }
> +
> +       return 0;
> +}


-- 
With Best Regards,
Andy Shevchenko