linux-kernel - Re: [PATCH v2 04/30] usb: phy: nop: Handle power supply regulator for the PHY

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Date:	Tue, 5 Feb 2013 11:20:01 +0200
From:	Felipe Balbi <balbi@...com>
To:	Roger Quadros <rogerq@...com>
CC:	<tony@...mide.com>, <linux@....linux.org.uk>,
	<sameo@...ux.intel.com>, <balbi@...com>,
	<stern@...land.harvard.edu>, <gregkh@...uxfoundation.org>,
	<eballetbo@...il.com>, <javier@...hile0.org>,
	<sshtylyov@...sta.com>, <linux-usb@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 04/30] usb: phy: nop: Handle power supply regulator
 for the PHY

On Mon, Jan 28, 2013 at 01:30:05PM +0200, Roger Quadros wrote:
> We use "vcc" as the supply name for the PHY's power supply.
> The power supply will be enabled during .init() and disabled
> during .shutdown()
> 
> Signed-off-by: Roger Quadros <rogerq@...com>

Acked-by: Felipe Balbi <balbi@...com>

> ---
>  drivers/usb/otg/nop-usb-xceiv.c |   18 ++++++++++++++++++
>  1 files changed, 18 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/usb/otg/nop-usb-xceiv.c b/drivers/usb/otg/nop-usb-xceiv.c
> index 849eb9d..0a9628c 100644
> --- a/drivers/usb/otg/nop-usb-xceiv.c
> +++ b/drivers/usb/otg/nop-usb-xceiv.c
> @@ -33,11 +33,13 @@
>  #include <linux/usb/nop-usb-xceiv.h>
>  #include <linux/slab.h>
>  #include <linux/clk.h>
> +#include <linux/regulator/consumer.h>
>  
>  struct nop_usb_xceiv {
>  	struct usb_phy		phy;
>  	struct device		*dev;
>  	struct clk		*clk;
> +	struct regulator	*vcc;
>  };
>  
>  static struct platform_device *pd;
> @@ -70,6 +72,11 @@ static int nop_init(struct usb_phy *phy)
>  {
>  	struct nop_usb_xceiv *nop = dev_get_drvdata(phy->dev);
>  
> +	if (!IS_ERR(nop->vcc)) {
> +		if (regulator_enable(nop->vcc))
> +			dev_err(phy->dev, "Failed to enable power\n");
> +	}
> +
>  	if (!IS_ERR(nop->clk))
>  		clk_enable(nop->clk);
>  
> @@ -82,6 +89,11 @@ static void nop_shutdown(struct usb_phy *phy)
>  
>  	if (!IS_ERR(nop->clk))
>  		clk_disable(nop->clk);
> +
> +	if (!IS_ERR(nop->vcc)) {
> +		if (regulator_disable(nop->vcc))
> +			dev_err(phy->dev, "Failed to disable power\n");
> +	}
>  }
>  
>  static int nop_set_peripheral(struct usb_otg *otg, struct usb_gadget *gadget)
> @@ -153,6 +165,12 @@ static int nop_usb_xceiv_probe(struct platform_device *pdev)
>  		}
>  	}
>  
> +	nop->vcc = devm_regulator_get(&pdev->dev, "vcc");
> +	if (IS_ERR(nop->vcc)) {
> +		dev_dbg(&pdev->dev, "Error getting vcc regulator: %ld\n",
> +					PTR_ERR(nop->vcc));
> +	}
> +
>  	nop->dev		= &pdev->dev;
>  	nop->phy.dev		= nop->dev;
>  	nop->phy.label		= "nop-xceiv";
> -- 
> 1.7.4.1
> 

-- 
balbi

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