linux-kernel - Re: [PATCH v2 6/8] usb: allow to supply the PHY in the drivers when using HCD

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Date:	Wed, 23 Jul 2014 18:59:41 +0800
From:	Peter Chen <peter.chen@...escale.com>
To:	Antoine Ténart 
	<antoine.tenart@...e-electrons.com>
CC:	<balbi@...com>, <gregkh@...uxfoundation.org>, <kishon@...com>,
	<stern@...land.harvard.edu>, <sergei.shtylyov@...entembedded.com>,
	<yoshihiro.shimoda.uh@...esas.com>,
	<alexandre.belloni@...e-electrons.com>,
	<thomas.petazzoni@...e-electrons.com>, <zmxu@...vell.com>,
	<jszhang@...vell.com>, <linux-usb@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 6/8] usb: allow to supply the PHY in the drivers
 when using HCD

On Tue, Jul 15, 2014 at 04:39:14PM +0200, Antoine Ténart wrote:
> This patch modify the generic code handling PHYs to allow them to be
> supplied from the drivers. This adds checks to ensure no PHY was already
> there when looking for one in the generic code. This also makes sure we
> do not modify its state in the generic HCD functions, it it was
> provided by the driver.

one extra "it"

> 
> Signed-off-by: Antoine Ténart <antoine.tenart@...e-electrons.com>
> ---
>  drivers/usb/core/hcd.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
> index 228bad89f09b..ce9ea309ab0f 100644
> --- a/drivers/usb/core/hcd.c
> +++ b/drivers/usb/core/hcd.c
> @@ -2650,7 +2650,7 @@ int usb_add_hcd(struct usb_hcd *hcd,
>  		}
>  	}
>  
> -	if (IS_ENABLED(CONFIG_GENERIC_PHY)) {
> +	if (IS_ENABLED(CONFIG_GENERIC_PHY) && !hcd->phy) {
>  		struct phy *phy = phy_get(hcd->self.controller, "usb");
>  
>  		if (IS_ERR(phy)) {
> @@ -2670,6 +2670,7 @@ int usb_add_hcd(struct usb_hcd *hcd,
>  				goto err_phy;
>  			}
>  			hcd->phy = phy;
> +			hcd->remove_phy = 1;
>  		}
>  	}
>  
> @@ -2816,7 +2817,7 @@ err_allocate_root_hub:
>  err_register_bus:
>  	hcd_buffer_destroy(hcd);
>  err_create_buf:
> -	if (IS_ENABLED(CONFIG_GENERIC_PHY) && hcd->phy) {
> +	if (IS_ENABLED(CONFIG_GENERIC_PHY) && hcd->remove_phy && hcd->phy) {
>  		phy_power_off(hcd->phy);
>  		phy_exit(hcd->phy);
>  		phy_put(hcd->phy);
> @@ -2900,7 +2901,7 @@ void usb_remove_hcd(struct usb_hcd *hcd)
>  	usb_deregister_bus(&hcd->self);
>  	hcd_buffer_destroy(hcd);
>  
> -	if (IS_ENABLED(CONFIG_GENERIC_PHY) && hcd->phy) {
> +	if (IS_ENABLED(CONFIG_GENERIC_PHY) && hcd->remove_phy && hcd->phy) {
>  		phy_power_off(hcd->phy);
>  		phy_exit(hcd->phy);
>  		phy_put(hcd->phy);
> -- 
> 1.9.1
> 

-- 

Best Regards,
Peter Chen
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