linux-kernel - Re: [PATCH] Fixed gpio polarity of gpio USB-phy reset.

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Date:	Thu, 14 Apr 2011 10:56:24 +0200
From:	Samuel Ortiz <sameo@...ux.intel.com>
To:	Juergen Kilb <J.Kilb@...tec.de>, balbi@...com
Cc:	linux-arm-kernel@...ts.infradead.org,
	dbrownell@...rs.sourceforge.net, gregkh@...e.de,
	linux-usb@...r.kernel.org, linux-omap@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Fixed gpio polarity of gpio USB-phy reset.

Hi Juergen,

On Thu, Apr 14, 2011 at 09:31:43AM +0200, Juergen Kilb wrote:
> With commit 19403165 a main part of ehci-omap.c moved to
> drivers/mfd/omap-usb-host.c created by commit 17cdd29d.
> Due to this reorganisation the polarity used to reset the
> external USB phy changed and USB host doesn't recognize
> any devices.
If that fix is correct, it looks like it should make its way to 2.6.39.
Felipe, are you ok with this fix ?

Cheers,
Samuel.

> Signed-off-by: Juergen Kilb <J.Kilb@...tec.de>
> ---
>  drivers/mfd/omap-usb-host.c |    8 ++++----
>  1 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
> index 53450f4..491cac5 100644
> --- a/drivers/mfd/omap-usb-host.c
> +++ b/drivers/mfd/omap-usb-host.c
> @@ -719,14 +719,14 @@ static int usbhs_enable(struct device *dev)
>  			gpio_request(pdata->ehci_data->reset_gpio_port[0],
>  						"USB1 PHY reset");
>  			gpio_direction_output
> -				(pdata->ehci_data->reset_gpio_port[0], 1);
> +				(pdata->ehci_data->reset_gpio_port[0], 0);
>  		}
>  
>  		if (gpio_is_valid(pdata->ehci_data->reset_gpio_port[1])) {
>  			gpio_request(pdata->ehci_data->reset_gpio_port[1],
>  						"USB2 PHY reset");
>  			gpio_direction_output
> -				(pdata->ehci_data->reset_gpio_port[1], 1);
> +				(pdata->ehci_data->reset_gpio_port[1], 0);
>  		}
>  
>  		/* Hold the PHY in RESET for enough time till DIR is high */
> @@ -906,11 +906,11 @@ static int usbhs_enable(struct device *dev)
>  
>  		if (gpio_is_valid(pdata->ehci_data->reset_gpio_port[0]))
>  			gpio_set_value
> -				(pdata->ehci_data->reset_gpio_port[0], 0);
> +				(pdata->ehci_data->reset_gpio_port[0], 1);
>  
>  		if (gpio_is_valid(pdata->ehci_data->reset_gpio_port[1]))
>  			gpio_set_value
> -				(pdata->ehci_data->reset_gpio_port[1], 0);
> +				(pdata->ehci_data->reset_gpio_port[1], 1);
>  	}
>  
>  end_count:
> -- 
> 1.7.0.4
> 

-- 
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