lkml.org 
[lkml]   [2015]   [Feb]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 3/3] ARM: at91: dt: at91sam9n12ek: enable udp
Hi Sylvain,

On 02/09/2015 06:04 PM, Sylvain Rochet wrote:
> Hello Bo,
>
> On Mon, Feb 09, 2015 at 05:02:52PM +0800, Bo Shen wrote:
>> Enable usb device port on at91sam9n12ek board.
>>
>> Signed-off-by: Bo Shen <voice.shen@atmel.com>
>> ---
>>
>> arch/arm/boot/dts/at91sam9n12ek.dts | 5 +++++
>> 1 file changed, 5 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/at91sam9n12ek.dts b/arch/arm/boot/dts/at91sam9n12ek.dts
>> index 13bb24e..3e572e5 100644
>> --- a/arch/arm/boot/dts/at91sam9n12ek.dts
>> +++ b/arch/arm/boot/dts/at91sam9n12ek.dts
>> @@ -120,6 +120,11 @@
>> };
>> };
>>
>> + usb1: gadget@f803c000 {
>> + atmel,vbus-gpio = <&pioB 16 GPIO_ACTIVE_HIGH>;
>> + status = "okay";
>> + };
>> +
>
> There is an external resistor divider on PB16, acting like a pull-down
> (R22+R23). PB16 reset state is input, pull-up, schmitt trigger, you need
> to disable the pull-up in pinctrl this way:
>
> usb1: gadget@f803c000 {
> pinctrl-names = "default";
> pinctrl-0 = <&pinctrl_board_usb1>;
> …
> }
>
> pinctrl … {
> usb1 {
> pinctrl_board_usb1: usb1-board {
> atmel,pins = <AT91_PIOB 16 AT91_PERIPH_GPIO AT91_PINCTRL_DEGLITCH>; /* PB16, no pull up and deglitch */
> };
> };
> };

Thanks.

I will add it in next version.

>
> Sylvain
>

Best Regards,
Bo Shen



\
 
 \ /
  Last update: 2015-02-09 11:41    [W:0.092 / U:0.852 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site