linux-kernel - Re: [PATCH 3/6] phy: core: Support regulator supply for PHY power

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Message-ID: <53B3FBD2.3090003@cogentembedded.com>
Date:	Wed, 02 Jul 2014 16:32:18 +0400
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Roger Quadros <rogerq@...com>, tony@...mide.com, kishon@...com,
	balbi@...com
CC:	nsekhar@...com, nm@...com, george.cherian@...com,
	linux-omap@...r.kernel.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/6] phy: core: Support regulator supply for PHY power

Hello.

On 07/02/2014 04:03 PM, Roger Quadros wrote:

> Some PHYs can be powered by an external power regulator.
> e.g. USB_HS PHY on DRA7 SoC. Make the PHY core support a
> power regulator.

> Signed-off-by: Roger Quadros <rogerq@...com>
> ---
>   drivers/phy/phy-core.c  | 32 ++++++++++++++++++++++++++++++++
>   include/linux/phy/phy.h |  2 ++
>   2 files changed, 34 insertions(+)

> diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
> index 49c4465..d817107 100644
> --- a/drivers/phy/phy-core.c
> +++ b/drivers/phy/phy-core.c
[...]
> @@ -664,6 +689,10 @@ EXPORT_SYMBOL_GPL(devm_phy_create);
>   void phy_destroy(struct phy *phy)
>   {
>   	pm_runtime_disable(&phy->dev);
> +
> +	if (phy->pwr)
> +		regulator_put(phy->pwr);

    regulator_put() already handles NULL pointer.

> +
>   	device_unregister(&phy->dev);
>   }
>   EXPORT_SYMBOL_GPL(phy_destroy);
> @@ -800,6 +829,9 @@ static void phy_release(struct device *dev)
>
>   	phy = to_phy(dev);
>   	dev_vdbg(dev, "releasing '%s'\n", dev_name(dev));
> +	if (phy->pwr)
> +		regulator_put(phy->pwr);

    Same comment here.

> +
>   	ida_simple_remove(&phy_ida, phy->id);
>   	kfree(phy);
>   }

WBR, Sergei

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