[PATCH 1/2] usb_hub_power_on: wait for the power to be stable

[Eric Bénard]

Hi Sascha,

Le Tue, 28 Aug 2012 17:24:25 +0200,
Eric Bénard <eric at eukrea.com> a écrit :

> - the 100ms value is taken from Linux & u-boot

and in fact after a few more tests without debug enabled, it seems that
a 200 ms value would be needed to get it working reliable with several
peripherals  so please wait for v2 before applying thyis patch.

Thanks,
Eric
> - without this, I don't see peripherals connected to a hub
> connected to an i.MX35's host port.
> 
> Signed-off-by: Eric Bénard <eric at eukrea.com>
> ---
>  drivers/usb/core/usb.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
> index a5075d5..ae3eb88 100644
> --- a/drivers/usb/core/usb.c
> +++ b/drivers/usb/core/usb.c
> @@ -948,7 +948,7 @@ static void usb_hub_power_on(struct usb_hub_device *hub)
>  		usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
>  		USB_HUB_PRINTF("port %d returns %lX\n", i + 1, dev->status);
>  	}
> -	mdelay(20);
> +	mdelay(100);
>  }
>  
>  #define MAX_TRIES 5