linux-kernel - Re: [PATCH v6 02/11] firmware: raspberrypi: Introduce devm_rpi_firmware

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Message-ID: <e2aa9af87060b91397fc4e1485ecf3ab3876f874.camel@suse.de>
Date:   Wed, 16 Dec 2020 11:37:01 +0100
From:   Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
To:     Bartosz Golaszewski <bgolaszewski@...libre.com>
Cc:     Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        LKML <linux-kernel@...r.kernel.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        bcm-kernel-feedback-list@...adcom.com, linux-pwm@...r.kernel.org,
        arm-soc <linux-arm-kernel@...ts.infradead.org>,
        linux-devicetree <devicetree@...r.kernel.org>, wahrenst@....net,
        Linux Input <linux-input@...r.kernel.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        devel@...verdev.osuosl.org, Philipp Zabel <p.zabel@...gutronix.de>,
        linux-gpio <linux-gpio@...r.kernel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-clk <linux-clk@...r.kernel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        linux-rpi-kernel@...ts.infradead.org,
        Andy Shevchenko <andy.shevchenko@...il.com>
Subject: Re: [PATCH v6 02/11] firmware: raspberrypi: Introduce
 devm_rpi_firmware_get()

On Wed, 2020-12-16 at 11:35 +0100, Bartosz Golaszewski wrote:
> On Fri, Dec 11, 2020 at 5:48 PM Nicolas Saenz Julienne
> <nsaenzjulienne@...e.de> wrote:
> > 
> > It'll simplify the firmware handling for most consumers.
> > 
> > Suggested-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
> > Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
> > Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
> > ---
> > 
> > Changes since v4:
> >  - Rearrange function calls for clarity, same functionality
> > 
> > Changes since v2:
> > - Create devm_rpi_firmware_get()
> > 
> >  drivers/firmware/raspberrypi.c             | 29 ++++++++++++++++++++++
> >  include/soc/bcm2835/raspberrypi-firmware.h |  8 ++++++
> >  2 files changed, 37 insertions(+)
> > 
> > diff --git a/drivers/firmware/raspberrypi.c b/drivers/firmware/raspberrypi.c
> > index b65e4c495772..250e01680742 100644
> > --- a/drivers/firmware/raspberrypi.c
> > +++ b/drivers/firmware/raspberrypi.c
> > @@ -243,6 +243,13 @@ void rpi_firmware_put(struct rpi_firmware *fw)
> >  }
> >  EXPORT_SYMBOL_GPL(rpi_firmware_put);
> > 
> > +static void devm_rpi_firmware_put(void *data)
> > +{
> > +       struct rpi_firmware *fw = data;
> > +
> > +       rpi_firmware_put(fw);
> > +}
> > +
> >  static int rpi_firmware_probe(struct platform_device *pdev)
> >  {
> >         struct device *dev = &pdev->dev;
> > @@ -331,6 +338,28 @@ struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node)
> >  }
> >  EXPORT_SYMBOL_GPL(rpi_firmware_get);
> > 
> > +/**
> > + * devm_rpi_firmware_get - Get pointer to rpi_firmware structure.
> > + * @firmware_node:    Pointer to the firmware Device Tree node.
> > + *
> > + * Returns NULL is the firmware device is not ready.
> > + */
> > +struct rpi_firmware *devm_rpi_firmware_get(struct device *dev,
> > +                                          struct device_node *firmware_node)
> > +{
> > +       struct rpi_firmware *fw;
> > +
> > +       fw = rpi_firmware_get(firmware_node);
> > +       if (!fw)
> > +               return NULL;
> > +
> > +       if (devm_add_action_or_reset(dev, devm_rpi_firmware_put, fw))
> > +               return NULL;
> > +
> > +       return fw;
> > +}
> > +EXPORT_SYMBOL_GPL(devm_rpi_firmware_get);
> > +
> >  static const struct of_device_id rpi_firmware_of_match[] = {
> >         { .compatible = "raspberrypi,bcm2835-firmware", },
> >         {},
> > diff --git a/include/soc/bcm2835/raspberrypi-firmware.h b/include/soc/bcm2835/raspberrypi-firmware.h
> > index fdfef7fe40df..73ad784fca96 100644
> > --- a/include/soc/bcm2835/raspberrypi-firmware.h
> > +++ b/include/soc/bcm2835/raspberrypi-firmware.h
> > @@ -142,6 +142,8 @@ int rpi_firmware_property_list(struct rpi_firmware *fw,
> >                                void *data, size_t tag_size);
> >  void rpi_firmware_put(struct rpi_firmware *fw);
> >  struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node);
> > +struct rpi_firmware *devm_rpi_firmware_get(struct device *dev,
> > +                                          struct device_node *firmware_node);
> >  #else
> >  static inline int rpi_firmware_property(struct rpi_firmware *fw, u32 tag,
> >                                         void *data, size_t len)
> > @@ -160,6 +162,12 @@ static inline struct rpi_firmware *rpi_firmware_get(struct device_node *firmware
> >  {
> >         return NULL;
> >  }
> > +
> > +static inline struct rpi_firmware *devm_rpi_firmware_get(struct device *dev,
> > +                                       struct device_node *firmware_node)
> > +{
> > +       return NULL;
> > +}
> >  #endif
> > 
> >  #endif /* __SOC_RASPBERRY_FIRMWARE_H__ */
> > --
> > 2.29.2
> > 
> 
> Reviewed-by: Bartosz Golaszewski <bgolaszewski@...libre.com>

Thanks for the reviews!


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