linux-kernel - Re: [PATCH 1/3] phy: core: Add devm_of_phy_get_by

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Message-ID: <20150320212645.GA25405@dtor-ws>
Date:	Fri, 20 Mar 2015 14:26:45 -0700
From:	Dmitry Torokhov <dtor@...gle.com>
To:	Arun Ramamurthy <arun.ramamurthy@...adcom.com>
Cc:	Kishon Vijay Abraham I <kishon@...com>,
	Tony Prisk <linux@...sktech.co.nz>,
	Alan Stern <stern@...land.harvard.edu>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-usb@...r.kernel.org,
	Anatol Pomazau <anatol@...gle.com>,
	Jonathan Richardson <jonathar@...adcom.com>,
	Scott Branden <sbranden@...adcom.com>,
	Ray Jui <rjui@...adcom.com>,
	bcm-kernel-feedback-list@...adcom.com
Subject: Re: [PATCH 1/3] phy: core: Add devm_of_phy_get_by_index to phy-core

Hi Arun,

On Fri, Mar 20, 2015 at 02:07:08PM -0700, Arun Ramamurthy wrote:
> Adding devm_of_phy_get_by_index to get phys by supplying an index
> and not a phy name when multiple phys are declared
> 
> Reviewed-by: Ray Jui <rjui@...adcom.com>
> Reviewed-by: Scott Branden <sbranden@...adcom.com>
> Signed-off-by: Arun Ramamurthy <arun.ramamurthy@...adcom.com>
> ---
>  drivers/phy/phy-core.c  | 30 ++++++++++++++++++++++++++++++
>  include/linux/phy/phy.h |  2 ++
>  2 files changed, 32 insertions(+)
> 
> diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
> index a12d353..0c03876 100644
> --- a/drivers/phy/phy-core.c
> +++ b/drivers/phy/phy-core.c
> @@ -622,6 +622,36 @@ struct phy *devm_of_phy_get(struct device *dev, struct device_node *np,
>  EXPORT_SYMBOL_GPL(devm_of_phy_get);
>  
>  /**
> + * devm_of_phy_get_by_index() - lookup and obtain a reference to a phy by index.
> + * @dev: device that requests this phy
> + * @np: node containing the phy
> + * @index: index of the phy
> + *
> + * Gets the phy using _of_phy_get(), and associates a device with it using
> + * devres. On driver detach, release function is invoked on the devres data,
> + * then, devres data is freed.
> + *
> + */
> +struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np,
> +				     int index)
> +{
> +	struct phy **ptr, *phy;
> +
> +	ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
> +	if (!ptr)
> +		return ERR_PTR(-ENOMEM);
> +
> +	phy = _of_phy_get(np, index);
> +	if (!IS_ERR(phy)) {
> +		*ptr = phy;
> +		devres_add(dev, ptr);
> +	} else {
> +		devres_free(ptr);
> +	}
> +
> +	return phy;
> +}

You want EXPORT_SYMBOL_GPL(devm_of_phy_get_by_index); here.

> +/**
>   * phy_create() - create a new phy
>   * @dev: device that is creating the new phy
>   * @node: device node of the phy
> diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
> index a0197fa..ae2ffaf 100644
> --- a/include/linux/phy/phy.h
> +++ b/include/linux/phy/phy.h
> @@ -133,6 +133,8 @@ struct phy *devm_phy_get(struct device *dev, const char *string);
>  struct phy *devm_phy_optional_get(struct device *dev, const char *string);
>  struct phy *devm_of_phy_get(struct device *dev, struct device_node *np,
>  			    const char *con_id);
> +struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np,
> +				     int index);
>  void phy_put(struct phy *phy);
>  void devm_phy_put(struct device *dev, struct phy *phy);
>  struct phy *of_phy_get(struct device_node *np, const char *con_id);
> -- 
> 2.3.2
> 

-- 
Dmitry
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