Menu
▾
▴
Re: [Gumstix-users] GPIO 168 problem
|
From: Michael A. <all...@gm...> - 2015-09-03 11:14:06
|
That looks like a brown out, did you have a peripheral connected to the USB
port? how much current does it use, is it perhaps forming a short circuit?
I can't help you much beyond this point, other than to suggest looking at
various signals with a scope and trying to figure out what is causing the
board to go down...
On 3 September 2015 at 13:05, Sergio Sanchez Vega <
ser...@gm...> wrote:
> Well...I compiled again .dts files with the suggestion you made in
> omap3-overo-base.dtsi:
> /* HS USB Port 2 Power */
> hsusb2_power: hsusb2_power_reg {
> compatible = "regulator-fixed";
> regulator-name = "hsusb2_vbus";
> regulator-min-microvolt = <5000000>;
> regulator-max-microvolt = <5000000>;
> startup-delay-us = <70000>;
> regulator-always-on;
> };
>
>
> And It doesn't work properly, because when I set value to 1 in gpio, the
> board restarts:
> root@ssanchez-GT150-F1:~# cd /sys/class/gpio
> root@ssanchez-GT150-F1:/sys/class/gpio# ls
> export gpiochip128 gpiochip32 gpiochip64 unexport
> gpiochip0 gpiochip160 gpiochip492 gpiochip96
> root@ssanchez-GT150-F1:/sys/class/gpio# echo 168 > export
> #### NOW IT LETS ME CREATE gpio168!!!!
> root@ssanchez-GT150-F1:/sys/class/gpio# cd gpio168
> root@ssanchez-GT150-F1:/sys/class/gpio/gpio168# ls
> active_low device direction edge power subsystem uevent value
> root@ssanchez-GT150-F1:/sys/class/gpio/gpio168# cd active_low
> -bash: cd: active_low: Not a directory
> root@ssanchez-GT150-F1:/sys/class/gpio/gpio168# cat active_low
> 0
> root@ssanchez-GT150-F1:/sys/class/gpio/gpio168# echo out > direction
> root@ssanchez-GT150-F1:/sys/class/gpio/gpio168# ls
> active_low device direction edge power subsystem uevent value
> root@ssanchez-GT150-F1:/sys/class/gpio/gpio168# echo 1 > value
> #### THE BOARD RESTARTS
> root@ssanchez-GT150-F1:/sys/class/gpio/gpio168# � t
> U-Boot SPL 2014.10-g2775fbf (Sep 03 2015 - 12:10:31)
> SPL: Please implement spl_start_uboot() for your board
> SPL: Direct Linux boot not active!
> reading u-boot.img
> reading u-boot.img
> ...
>
>
> On 03/09/15 10:07, Michael Allwright wrote:
>
> and also probably remove the "enable-active-high" statement...
>
> On 3 September 2015 at 10:05, Michael Allwright <all...@gm...> <all...@gm...> wrote:
>
> Depending on the nature of the hardware involved, drivers can have
> both optional/required attributes. Optional attributes are normally
> used where the driver will enable a certain feature if the required
> resources (irqs, dmas, gpio lines etc) are made available.
>
> On closer inspection of the dts snippet from above, this is just a
> fixed regulator and the gpio control is indeed optional as opposed to
> required: Documentation/devicetree/bindings/regulator/fixed-regulator.txt
>
> In the top level DTS I would remove the gpio control and add regulator-always-on
>
> /* HS USB Port 2 Power */
> hsusb2_power: hsusb2_power_reg {
> compatible = "regulator-fixed";
> regulator-name = "hsusb2_vbus";
> regulator-min-microvolt = <5000000>;
> regulator-max-microvolt = <5000000>;
> startup-delay-us = <70000>;
> regulator-always-on;
> enable-active-high;
> };
>
> After doing this, I believe (I haven't personally tested this exact
> configuration) that the overlaying mechanism will use this definition
> instead, overriding what was in the DTSI. GPIO 168 should then be
> available for export via sysfs...
>
>
> On 2 September 2015 at 18:07, Scott Ellis <sc...@ju...> <sc...@ju...> wrote:
>
> 'required property' meaning what exactly?
>
> Is that something defined in the driver or in the dts?
>
> What would the override statement look like in the top level dts?
>
>
> "Michael Allwright" <all...@gm...> <all...@gm...> said:
>
>
> ------------------------------------------------------------------------------
> Monitor Your Dynamic Infrastructure at Any Scale With Datadog!
> Get real-time metrics from all of your servers, apps and tools
> in one place.
> SourceForge users - Click here to start your Free Trial of Datadog now!http://pubads.g.doubleclick.net/gampad/clk?id=241902991&iu=/4140_______________________________________________
> gumstix-users mailing lis...@li...https://lists.sourceforge.net/lists/listinfo/gumstix-users
> You could check if the gpio is a required property of that node. If it
> isn't, you could override it in the top level DTS...
>
> Scott Ellis <sc...@ju...> <sc...@ju...> schrieb am Mi., 2. Sep. 2015 17:47:
>
>
> I think you are prevented from gaining sysfs control of the gpio
> because of this section in the omap3-overo-base.dtsi
>
> /* HS USB Port 2 Power */
> hsusb2_power: hsusb2_power_reg {
> compatible = "regulator-fixed";
> regulator-name = "hsusb2_vbus";
> regulator-min-microvolt = <5000000>;
> regulator-max-microvolt = <5000000>;
> gpio = <&gpio6 8 0>; /*
> gpio_168: vbus enable */
> startup-delay-us = <70000>;
> enable-active-high;
> };
>
>
> This claim of the gpio by the usb driver prevents any other use.
> At least that's my theory.
>
> I have the same issue for another system, but the same basic problem.
>
> I know that doesn't really help.
>
>
> "Sergio Sanchez Vega" <ser...@gm...> <ser...@gm...> said:
>
>
> ------------------------------------------------------------------------------
>
> Monitor Your Dynamic Infrastructure at Any Scale With Datadog!
> Get real-time metrics from all of your servers, apps and tools
> in one place.
> SourceForge users - Click here to start your Free Trial of Datadog now!
>
>
> http://pubads.g.doubleclick.net/gampad/clk?id=241902991&iu=/4140_______________________________________________
>
> gumstix-users mailing lis...@li...https://lists.sourceforge.net/lists/listinfo/gumstix-users
> Somebody can help me???
> I just wanna power off and power on the USB device plugged in my Overo
> board.
>
> Thanks
>
> On 28/08/15 17:19, Sergio Sanchez Vega wrote:
>
> I am trying to use GPIO 168 in my Gumstix Overo AirSTORM-Y COM (I want
> to be able to reset the usb device pluged) but I can't see it in
> /sys/class/gpio
> I try to create it but it doesn't allow me:
> root@ssanchez-GT150-F1:/sys/class/gpio# echo 168 > export
> -bash: echo: write error: Device or resource busy
> root@ssanchez-GT150-F1:/sys/class/gpio#
>
>
> I try to compile a new u-boot using the next commands but It has the
> same result:
> git clone git://github.com/gumstix/u-boot.git<http://github.com/gumstix/u-boot.git> <http://github.com/gumstix/u-boot.git>
> cd u-boot
> git checkout v2015.04
> make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- omap3_overo_config
> # Now I edit the .config file and change
> CONFIG_DEFAULT_DEVICE_TREE=""to
> CONFIG_DEFAULT_DEVICE_TREE="omap3-overo-storm-tobi"
> make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- all
>
>
> Can you help me?
> Thanks!!!!
>
>
>
>
> ------------------------------------------------------------------------------
> Monitor Your Dynamic Infrastructure at Any Scale With Datadog!
> Get real-time metrics from all of your servers, apps and tools
> in one place.
> SourceForge users - Click here to start your Free Trial of Datadog now!http://pubads.g.doubleclick.net/gampad/clk?id=241902991&iu=/4140
> _______________________________________________
> gumstix-users mailing lis...@li...https://lists.sourceforge.net/lists/listinfo/gumstix-users
>
>
>
> ------------------------------------------------------------------------------
> Monitor Your Dynamic Infrastructure at Any Scale With Datadog!
> Get real-time metrics from all of your servers, apps and tools
> in one place.
> SourceForge users - Click here to start your Free Trial of Datadog now!http://pubads.g.doubleclick.net/gampad/clk?id=241902991&iu=/4140
> _______________________________________________
> gumstix-users mailing lis...@li...https://lists.sourceforge.net/lists/listinfo/gumstix-users
>
> ------------------------------------------------------------------------------
> Monitor Your Dynamic Infrastructure at Any Scale With Datadog!
> Get real-time metrics from all of your servers, apps and tools
> in one place.
> SourceForge users - Click here to start your Free Trial of Datadog now!http://pubads.g.doubleclick.net/gampad/clk?id=241902991&iu=/4140
> _______________________________________________
> gumstix-users mailing lis...@li...https://lists.sourceforge.net/lists/listinfo/gumstix-users
>
>
>
>
> ------------------------------------------------------------------------------
> Monitor Your Dynamic Infrastructure at Any Scale With Datadog!
> Get real-time metrics from all of your servers, apps and tools
> in one place.
> SourceForge users - Click here to start your Free Trial of Datadog now!
> http://pubads.g.doubleclick.net/gampad/clk?id=241902991&iu=/4140
> _______________________________________________
> gumstix-users mailing list
> gum...@li...
> https://lists.sourceforge.net/lists/listinfo/gumstix-users
>
>
|