* [U-Boot] [PATCH] at91sam9260ek: pull up on gpio
@ 2011-04-27 6:38 Prchal Jiří
2011-06-06 6:13 ` Reinhard Meyer
0 siblings, 1 reply; 2+ messages in thread
From: Prchal Jiří @ 2011-04-27 6:38 UTC (permalink / raw)
To: u-boot
This fixes floating pin PB14 (DRXD) if it is unconnected, witch cause sometimes to stop autoboot by receiving char
(noise). It turns internal pull up on this pin.
It turns pull up on all other pins where should be pull up and is set in driver too.
Signed-off-by: Jiri Prchal <jiri.prchal@aksignal.cz>
--- u-boot-2010.09/include/configs/at91sam9260ek.h.orig 2010-09-28 23:20:55.000000000 +0200
+++ u-boot-2010.09/include/configs/at91sam9260ek.h 2011-04-27 08:05:16.231133740 +0200
@@ -55,6 +55,7 @@
* Hardware drivers
*/
#define CONFIG_AT91_GPIO 1
+#define CONFIG_AT91_GPIO_PULLUP 1
#define CONFIG_ATMEL_USART 1
#undef CONFIG_USART0
#undef CONFIG_USART1
^ permalink raw reply [flat|nested] 2+ messages in thread
* [U-Boot] [PATCH] at91sam9260ek: pull up on gpio
2011-04-27 6:38 [U-Boot] [PATCH] at91sam9260ek: pull up on gpio Prchal Jiří
@ 2011-06-06 6:13 ` Reinhard Meyer
0 siblings, 0 replies; 2+ messages in thread
From: Reinhard Meyer @ 2011-06-06 6:13 UTC (permalink / raw)
To: u-boot
Dear Prchal Ji??,
> This fixes floating pin PB14 (DRXD) if it is unconnected, witch cause sometimes to stop autoboot by receiving char
> (noise). It turns internal pull up on this pin.
> It turns pull up on all other pins where should be pull up and is set in driver too.
>
> Signed-off-by: Jiri Prchal <jiri.prchal@aksignal.cz>
>
> --- u-boot-2010.09/include/configs/at91sam9260ek.h.orig 2010-09-28 23:20:55.000000000 +0200
> +++ u-boot-2010.09/include/configs/at91sam9260ek.h 2011-04-27 08:05:16.231133740 +0200
> @@ -55,6 +55,7 @@
> * Hardware drivers
> */
> #define CONFIG_AT91_GPIO 1
> +#define CONFIG_AT91_GPIO_PULLUP 1
> #define CONFIG_ATMEL_USART 1
> #undef CONFIG_USART0
> #undef CONFIG_USART1
This is based on old code.
Anyway, the Pull-Ups are enabled in the current (not yet in mainline) at91sam9260ek port.
Best Regards,
Reinhard
^ permalink raw reply [flat|nested] 2+ messages in thread
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2011-04-27 6:38 [U-Boot] [PATCH] at91sam9260ek: pull up on gpio Prchal Jiří
2011-06-06 6:13 ` Reinhard Meyer
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