Re: [PATCH v6 02/11] firmware: raspberrypi: Introduce devm_rpi_firmware_get()

[Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>]

On Fri, Dec 11, 2020 at 5:48 PM Nicolas Saenz Julienne
<nsaenzjulienne@xxxxxxx> wrote:
>
> It'll simplify the firmware handling for most consumers.
>
> Suggested-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@xxxxxxx>
> Reviewed-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
> ---
>
> 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@xxxxxxxxxxxx>