linux-kernel - Re: [PATCH v2 19/20] extcon: intel-cht-wc: Add support for registering a power

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Date:   Tue, 16 Nov 2021 17:19:07 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Mark Gross <markgross@...nel.org>,
        Andy Shevchenko <andy@...radead.org>,
        Wolfram Sang <wsa@...-dreams.de>,
        Sebastian Reichel <sre@...nel.org>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Ard Biesheuvel <ardb@...nel.org>, Len Brown <lenb@...nel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Yauhen Kharuzhy <jekhor@...il.com>,
        Tsuchiya Yuto <kitakar@...il.com>,
        Platform Driver <platform-driver-x86@...r.kernel.org>,
        linux-i2c <linux-i2c@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-efi <linux-efi@...r.kernel.org>
Subject: Re: [PATCH v2 19/20] extcon: intel-cht-wc: Add support for
 registering a power_supply class-device

On Sun, Nov 14, 2021 at 7:05 PM Hans de Goede <hdegoede@...hat.com> wrote:
>
> The bq25890 used on the Yogabook YB1-X90 / -X91 models relies on
> the extcon-driver's BC-1.2 charger detection, and the bq25890 driver
> expect this info to be  available through a parent power_supply
> class-device which models the detected charger (idem to how the Type-C
> TCPM code registers a power_supply classdev for the connected charger).
>
> Add support for registering the power_supply class-device expected
> by this setup.

...

> +       struct cht_wc_extcon_data *ext = power_supply_get_drvdata(psy);

> +       int ret = 0;

Not needed.

> +       switch (psp) {
> +       case POWER_SUPPLY_PROP_USB_TYPE:
> +               val->intval = ext->usb_type;
> +               break;
> +       case POWER_SUPPLY_PROP_ONLINE:
> +               val->intval = ext->usb_type ? 1 : 0;
> +               break;
> +       default:

> +               ret = -EINVAL;
> +               break;

return -EINVAL;

> +       }
> +
> +       return ret;

return 0;

> +}

P.S. And here you have a "break", which is nice!

-- 
With Best Regards,
Andy Shevchenko