Re: [PATCH v18 3/5] phy: core: Add devm_phy_get_by_of_node()

[Neil Armstrong <neil.armstrong@linaro.org>]

On 9/17/26 13:07, Bryan O'Donoghue wrote:
> Add a devm variant of phy_get_by_of_node() to allow for the familiar
> pattern of having devres automatically release resources on the driver's
> exit path.
> 
> Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
> ---
>   drivers/phy/phy-core.c  | 36 +++++++++++++++++++++++++++++++++++-
>   include/linux/phy/phy.h |  7 +++++++
>   2 files changed, 42 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
> index 490a7cde6d40a..10e9323566803 100644
> --- a/drivers/phy/phy-core.c
> +++ b/drivers/phy/phy-core.c
> @@ -833,7 +833,7 @@ struct phy *phy_get(struct device *dev, const char *string)
>   
>   	link = device_link_add(dev, &phy->dev, DL_FLAG_STATELESS);
>   	if (!link)
> -		dev_dbg(dev, "failed to create device link to %s\n",
> +		dev_err(dev, "failed to create device link to %s\n",
>   			dev_name(phy->dev.parent));

This change belongs in another patch.

Neil>
>   out_unlock:
> @@ -1050,6 +1050,40 @@ struct phy *phy_get_by_of_node(struct device_node *np)
>   }
>   EXPORT_SYMBOL_GPL(phy_get_by_of_node);
>   
> +/**
> + * devm_phy_get_by_of_node() - devm managed lookup and obtain phy reference by device node
> + * @dev: device requesting the PHY
> + * @np: device_node of the PHY provider
> + *
> + * Returns phy associated with the device_node or ERR_PTR. devres manages
> + * releasing resources.
> + */
> +struct phy *devm_phy_get_by_of_node(struct device *dev, struct device_node *np)
> +{
> +	struct phy **ptr, *phy;
> +	struct device_link *link;
> +
> +	ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
> +	if (!ptr)
> +		return ERR_PTR(-ENOMEM);
> +
> +	phy = phy_get_by_of_node(np);
> +	if (IS_ERR(phy)) {
> +		devres_free(ptr);
> +		return phy;
> +	}
> +
> +	*ptr = phy;
> +	devres_add(dev, ptr);
> +	link = device_link_add(dev, &phy->dev, DL_FLAG_STATELESS);
> +	if (!link)
> +		dev_dbg(dev, "failed to create device link to %s\n",
> +			dev_name(phy->dev.parent));
> +
> +	return phy;
> +}
> +EXPORT_SYMBOL_GPL(devm_phy_get_by_of_node);
> +
>   /**
>    * phy_create() - create a new phy
>    * @dev: device that is creating the new phy
> diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
> index 71c2e16397130..14b924a88411f 100644
> --- a/include/linux/phy/phy.h
> +++ b/include/linux/phy/phy.h
> @@ -285,6 +285,7 @@ struct phy *devm_of_phy_optional_get(struct device *dev, struct device_node *np,
>   struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np,
>   				     int index);
>   struct phy *phy_get_by_of_node(struct device_node *np);
> +struct phy *devm_phy_get_by_of_node(struct device *dev, struct device_node *np);
>   void of_phy_put(struct phy *phy);
>   void phy_put(struct device *dev, struct phy *phy);
>   void devm_phy_put(struct device *dev, struct phy *phy);
> @@ -499,6 +500,12 @@ static inline struct phy *phy_get_by_of_node(struct device_node *np)
>   	return ERR_PTR(-ENOSYS);
>   }
>   
> +static inline struct phy *devm_phy_get_by_of_node(struct device *dev,
> +						  struct device_node *np)
> +{
> +	return ERR_PTR(-ENOSYS);
> +}
> +
>   static inline void of_phy_put(struct phy *phy)
>   {
>   }
>