linux-kernel - Re: [PATCH v2 1/7] acpi: utils: move acpi_lpss

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Message-ID: <CAJZ5v0hihFa=M658GE2LtoKCnPkMQznXBtq9_+g0_4gFnw6qAg@mail.gmail.com>
Date:   Mon, 18 Jan 2021 17:06:30 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Daniel Scally <djrscally@...il.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        linux-gpio@...r.kernel.org, linux-i2c <linux-i2c@...r.kernel.org>,
        Platform Driver <platform-driver-x86@...r.kernel.org>,
        "open list:ACPI COMPONENT ARCHITECTURE (ACPICA)" <devel@...ica.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>, andy@...nel.org,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Wolfram Sang <wsa@...nel.org>,
        Lee Jones <lee.jones@...aro.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <mgross@...ux.intel.com>,
        Robert Moore <robert.moore@...el.com>,
        Erik Kaneda <erik.kaneda@...el.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Kieran Bingham <kieran.bingham@...asonboard.com>
Subject: Re: [PATCH v2 1/7] acpi: utils: move acpi_lpss_dep() to utils

On Mon, Jan 18, 2021 at 1:30 PM Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
>
> On Mon, Jan 18, 2021 at 12:34:22AM +0000, Daniel Scally wrote:
> > I need to be able to identify devices which declare themselves to be
> > dependent on other devices through _DEP; add this function to utils.c
> > and export it to the rest of the ACPI layer.
>
> Prefix -> "ACPI / utils: "

Preferably "ACPI: utils: " for that matter and yes, please rename the
function while moving it.

> Otherwise good to me
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
>
> > Suggested-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> > Signed-off-by: Daniel Scally <djrscally@...il.com>
> > ---
> > Changes in v2:
> >       - Introduced
> >
> >  drivers/acpi/acpi_lpss.c | 24 ------------------------
> >  drivers/acpi/internal.h  |  1 +
> >  drivers/acpi/utils.c     | 24 ++++++++++++++++++++++++
> >  3 files changed, 25 insertions(+), 24 deletions(-)
> >
> > diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
> > index be73974ce449..70c7d9a3f715 100644
> > --- a/drivers/acpi/acpi_lpss.c
> > +++ b/drivers/acpi/acpi_lpss.c
> > @@ -543,30 +543,6 @@ static struct device *acpi_lpss_find_device(const char *hid, const char *uid)
> >       return bus_find_device(&pci_bus_type, NULL, &data, match_hid_uid);
> >  }
> >
> > -static bool acpi_lpss_dep(struct acpi_device *adev, acpi_handle handle)
> > -{
> > -     struct acpi_handle_list dep_devices;
> > -     acpi_status status;
> > -     int i;
> > -
> > -     if (!acpi_has_method(adev->handle, "_DEP"))
> > -             return false;
> > -
> > -     status = acpi_evaluate_reference(adev->handle, "_DEP", NULL,
> > -                                      &dep_devices);
> > -     if (ACPI_FAILURE(status)) {
> > -             dev_dbg(&adev->dev, "Failed to evaluate _DEP.\n");
> > -             return false;
> > -     }
> > -
> > -     for (i = 0; i < dep_devices.count; i++) {
> > -             if (dep_devices.handles[i] == handle)
> > -                     return true;
> > -     }
> > -
> > -     return false;
> > -}
> > -
> >  static void acpi_lpss_link_consumer(struct device *dev1,
> >                                   const struct lpss_device_links *link)
> >  {
> > diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
> > index cb229e24c563..ee62c0973576 100644
> > --- a/drivers/acpi/internal.h
> > +++ b/drivers/acpi/internal.h
> > @@ -79,6 +79,7 @@ static inline void acpi_lpss_init(void) {}
> >  #endif
> >
> >  void acpi_apd_init(void);
> > +bool acpi_lpss_dep(struct acpi_device *adev, acpi_handle handle);
> >
> >  acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src);
> >  bool acpi_queue_hotplug_work(struct work_struct *work);
> > diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
> > index ddca1550cce6..78b38775f18b 100644
> > --- a/drivers/acpi/utils.c
> > +++ b/drivers/acpi/utils.c
> > @@ -807,6 +807,30 @@ static int acpi_dev_match_cb(struct device *dev, const void *data)
> >       return hrv == match->hrv;
> >  }
> >
> > +bool acpi_lpss_dep(struct acpi_device *adev, acpi_handle handle)
> > +{
> > +     struct acpi_handle_list dep_devices;
> > +     acpi_status status;
> > +     int i;
> > +
> > +     if (!acpi_has_method(adev->handle, "_DEP"))
> > +             return false;
> > +
> > +     status = acpi_evaluate_reference(adev->handle, "_DEP", NULL,
> > +                                      &dep_devices);
> > +     if (ACPI_FAILURE(status)) {
> > +             dev_dbg(&adev->dev, "Failed to evaluate _DEP.\n");
> > +             return false;
> > +     }
> > +
> > +     for (i = 0; i < dep_devices.count; i++) {
> > +             if (dep_devices.handles[i] == handle)
> > +                     return true;
> > +     }
> > +
> > +     return false;
> > +}
> > +
> >  /**
> >   * acpi_dev_present - Detect that a given ACPI device is present
> >   * @hid: Hardware ID of the device.
> > --
> > 2.25.1
> >
>
> --
> With Best Regards,
> Andy Shevchenko
>
>