linux-kernel - Re: [PATCH v2 18/20] extcon: intel-cht-wc: Refactor cht_wc_extcon_get

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Date:   Sat, 20 Nov 2021 00:44:56 +0900
From:   Chanwoo Choi <cwchoi00@...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>,
        linux-acpi@...r.kernel.org, Yauhen Kharuzhy <jekhor@...il.com>,
        Tsuchiya Yuto <kitakar@...il.com>,
        platform-driver-x86@...r.kernel.org, linux-i2c@...r.kernel.org,
        Linux PM list <linux-pm@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-efi@...r.kernel.org
Subject: Re: [PATCH v2 18/20] extcon: intel-cht-wc: Refactor cht_wc_extcon_get_charger()

Hi,

On Thu, Nov 18, 2021 at 7:31 AM Hans de Goede <hdegoede@...hat.com> wrote:
>
> Hi,
>
> On 11/17/21 08:15, Chanwoo Choi wrote:
> > Hello,
> >
> > I think that you need to squash it with patch21
> > I'm not sure that this patch is either atomic or not because
> > you remove the 'return EXTCON_CHG_USB_SDP/EXTCON_CHG_USB_SDP'
> > without explaining why it is no problem. Just mention that
> > pass the role to next 'switch' cases. But, before this change,
> > there were any reason to return the type of charger cable
> > before switch statement.
>
> The setting of usbsrc to "CHT_WC_USBSRC_TYPE_SDP << CHT_WC_USBSRC_TYPE_SHIFT"
> will make the following switch-case return EXTCON_CHG_USB_SDP
> just as before, so there is no functional change.
>
> > According to your patch description, you don't need
> > to make the separate patch of it. Please squash it with patch21.
>
> Having this refactoring in a separate patch makes it easier
> to see what is going on in patch 21. So I'm going to keep this
> as a separate patch for v3 of this series.

If you want to keep this  patch, please remove the following description.
Instead, just mention to focus on refactor it without behavior changes.

'This is a preparation patch for adding support for registering
a power_supply class device.'

>
>
> > On 21. 11. 15. 오전 2:03, Hans de Goede wrote:
> >> Refactor cht_wc_extcon_get_charger() to have all the returns are in
> >> the "switch (usbsrc)" cases.
> >>
> >> This is a preparation patch for adding support for registering
> >> a power_supply class device.
> >>
> >> Signed-off-by: Hans de Goede <hdegoede@...hat.com>
> >> ---
> >>   drivers/extcon/extcon-intel-cht-wc.c | 15 ++++++++-------
> >>   1 file changed, 8 insertions(+), 7 deletions(-)
> >>
> >> diff --git a/drivers/extcon/extcon-intel-cht-wc.c b/drivers/extcon/extcon-intel-cht-wc.c
> >> index 119b83793123..f2b93a99a625 100644
> >> --- a/drivers/extcon/extcon-intel-cht-wc.c
> >> +++ b/drivers/extcon/extcon-intel-cht-wc.c
> >> @@ -153,14 +153,15 @@ static int cht_wc_extcon_get_charger(struct cht_wc_extcon_data *ext,
> >>       } while (time_before(jiffies, timeout));
> >>         if (status != CHT_WC_USBSRC_STS_SUCCESS) {
> >> -        if (ignore_errors)
> >> -            return EXTCON_CHG_USB_SDP; /* Save fallback */
> >> +        if (!ignore_errors) {
> >> +            if (status == CHT_WC_USBSRC_STS_FAIL)
> >> +                dev_warn(ext->dev, "Could not detect charger type\n");
> >> +            else
> >> +                dev_warn(ext->dev, "Timeout detecting charger type\n");
> >> +        }
> >>   -        if (status == CHT_WC_USBSRC_STS_FAIL)
> >> -            dev_warn(ext->dev, "Could not detect charger type\n");
> >> -        else
> >> -            dev_warn(ext->dev, "Timeout detecting charger type\n");
> >> -        return EXTCON_CHG_USB_SDP; /* Save fallback */
> >> +        /* Save fallback */
> >> +        usbsrc = CHT_WC_USBSRC_TYPE_SDP << CHT_WC_USBSRC_TYPE_SHIFT;
> >>       }
> >>         usbsrc = (usbsrc & CHT_WC_USBSRC_TYPE_MASK) >> CHT_WC_USBSRC_TYPE_SHIFT;
> >>
> >
> >
>


-- 
Best Regards,
Chanwoo Choi