linux-kernel - Re: [PATCHv4 6/6] usb: dwc3: host: convey the PHYs to xhci

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Date:	Thu, 6 Nov 2014 12:55:39 +0530
From:	Kishon Vijay Abraham I <kishon@...com>
To:	Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	"balbi@...com" <balbi@...com>
CC:	Vivek Gautam <gautam.vivek@...sung.com>,
	<linux-kernel@...r.kernel.org>, <linux-usb@...r.kernel.org>,
	<andrew.kim@...el.com>
Subject: Re: [PATCHv4 6/6] usb: dwc3: host: convey the PHYs to xhci

Hi Felipe,

On Friday 17 October 2014 08:09 PM, Heikki Krogerus wrote:
> On some platforms a PHY may need to be handled also in the
> host controller driver. Exynos5420 SoC requires some "PHY
> tuning" based on the USB speed. This patch delivers dwc3's
> PHYs to the xhci platform device when it's created.
> 
> Signed-off-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
> Tested-by: Vivek Gautam <gautam.vivek@...sung.com>
> Acked-by: Felipe Balbi <balbi@...com>

Already see you acked-by, so I'm queueing this in my linux-phy tree.

Thanks
Kishon
> ---
>  drivers/usb/dwc3/host.c | 22 ++++++++++++++++------
>  1 file changed, 16 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
> index dcb8ca0..12bfd3c 100644
> --- a/drivers/usb/dwc3/host.c
> +++ b/drivers/usb/dwc3/host.c
> @@ -29,8 +29,7 @@ int dwc3_host_init(struct dwc3 *dwc)
>  	xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
>  	if (!xhci) {
>  		dev_err(dwc->dev, "couldn't allocate xHCI device\n");
> -		ret = -ENOMEM;
> -		goto err0;
> +		return -ENOMEM;
>  	}
>  
>  	dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask);
> @@ -60,22 +59,33 @@ int dwc3_host_init(struct dwc3 *dwc)
>  		goto err1;
>  	}
>  
> +	phy_create_lookup(dwc->usb2_generic_phy, "usb2-phy",
> +			  dev_name(&xhci->dev));
> +	phy_create_lookup(dwc->usb3_generic_phy, "usb3-phy",
> +			  dev_name(&xhci->dev));
> +
>  	ret = platform_device_add(xhci);
>  	if (ret) {
>  		dev_err(dwc->dev, "failed to register xHCI device\n");
> -		goto err1;
> +		goto err2;
>  	}
>  
>  	return 0;
> -
> +err2:
> +	phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
> +			  dev_name(&xhci->dev));
> +	phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
> +			  dev_name(&xhci->dev));
>  err1:
>  	platform_device_put(xhci);
> -
> -err0:
>  	return ret;
>  }
>  
>  void dwc3_host_exit(struct dwc3 *dwc)
>  {
> +	phy_remove_lookup(dwc->usb2_generic_phy, "usb2-phy",
> +			  dev_name(&dwc->xhci->dev));
> +	phy_remove_lookup(dwc->usb3_generic_phy, "usb3-phy",
> +			  dev_name(&dwc->xhci->dev));
>  	platform_device_unregister(dwc->xhci);
>  }
> 
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