linux-kernel - Re: [PATCH v4 1/2] platform: chrome: Add cros-usbpd-notify driver

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Date:   Mon, 13 Jan 2020 18:42:42 -0800
From:   Prashant Malani <pmalani@...omium.org>
To:     Enric Balletbo i Serra <enric.balletbo@...labora.com>
Cc:     Guenter Roeck <groeck@...omium.org>,
        Benson Leung <bleung@...omium.org>,
        Lee Jones <lee.jones@...aro.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Jon Flatley <jflat@...omium.org>,
        Gwendal Grignou <gwendal@...omium.org>
Subject: Re: [PATCH v4 1/2] platform: chrome: Add cros-usbpd-notify driver

Hi Enric,

> > Perhaps we should just make them two separate ifdef blocks, i.e #ifdef
> > CONFIG_OF, and then #ifdef CONFIG_ACPI? Would be great to hear your
> > recommendation here.
> >
>
> If understand correctly what you want is on some devices (usually the ones that
> use ACPI to instantiate the devices) use the notify ACPI callback, otherwise, on
> devices using OF to instantiate the devices, create a notifier. The driver
> should work on both cases. The problem is that CONFIG_OF and CONFIG_ACPI are not
>  exclusive and select one does not imply not select the other. So yes I'm fine
> on have both ifdef blocks, but in the cros_ec_dev (patch 2/2) you should
> register the notifier only if IS_ENABLED(CONFIG_OF)
>
Thanks. Will upload the updated patches soon.

Best regards,
> Cheers,
>  Enric
>
> > Thanks again!
> >