diff mbox

Fixed gpio polarity of gpio USB-phy reset.

Message ID 1302766303-1157-1-git-send-email-J.Kilb@phytec.de (mailing list archive)
State New, archived
Headers show

Commit Message

Juergen Kilb April 14, 2011, 7:31 a.m. UTC
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.

Signed-off-by: Juergen Kilb <J.Kilb@phytec.de>
---
 drivers/mfd/omap-usb-host.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

Comments

Samuel Ortiz April 14, 2011, 8:56 a.m. UTC | #1
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@phytec.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
>
Felipe Balbi April 14, 2011, 10:32 a.m. UTC | #2
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.
> 
> Signed-off-by: Juergen Kilb <J.Kilb@phytec.de>

Judging by how ehci-omap.c was before moving the code:

Acked-by: Felipe Balbi <balbi@ti.com>
Sergei Shtylyov April 14, 2011, 11:02 a.m. UTC | #3
Hello.

On 14-04-2011 11:31, 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.

    Pelase also specify the summaries of those commits -- for the human readers.

> Due to this reorganisation the polarity used to reset the
> external USB phy changed and USB host doesn't recognize
> any devices.

> Signed-off-by: Juergen Kilb <J.Kilb@phytec.de>

WBR, Sergei
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Steve Sakoman April 15, 2011, 1:17 p.m. UTC | #4
On Thu, Apr 14, 2011 at 3:32 AM, Felipe Balbi <balbi@ti.com> wrote:
> 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.
>>
>> Signed-off-by: Juergen Kilb <J.Kilb@phytec.de>
>
> Judging by how ehci-omap.c was before moving the code:
>
> Acked-by: Felipe Balbi <balbi@ti.com>

This fixes the issue on Overo:

Tested-by: Steve Sakoman <steve@sakoman.com>

Steve
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diff mbox

Patch

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: