Ok, think I kind of maybe figured it out.
looks like the nxp hdmi interface apparently uses these pins as well... so
I have to disable it...
are the HDMI and eMMC really that hard tied together?
I couldn't find a way to disable one with out the other, or maybe I'm just
an idiot.
anyway off to pull a new image, and flash to an SD card, so I can boot
without eMMC. and a serial console...
On Monday, March 7, 2016 at 1:22:43 PM UTC-5, Delbert Martin wrote:
>
> Trying to enable PRUs and set P8 45,46 to output just to test some IO
> toggle using R30 on PRU1
> OVERLAY: project-00A0.dts:
> /dts-v1/;
> /plugin/;
> /{
> compatible = "ti,beaglebone","ti,beaglebone-black";
> part-number = "project";
> version = "00A0";
>
> exclusive-use =
> "P8.45",
> "P8.46";
> fragment@0 {
> target = <&am33xx_pinmux>;
> __overlay__ {
> bone_project_pins: pinmux_project_pins {
> pinctrl-single,pins=<0x0a0 0x05 0x0a4 0x05>;
> };
> };
> };
> fragment@1 {
> target = <&ocp>;
> __overlay__ {
> project {
> compatible = "bone-pinmux-helper";
> status = "okay";
> pinctrl-names = "default";
> pinctrl-0 = <&bone_project_pins>;
> };
> };
> };
> fragment@2 {
> target = <&pruss>;
> __overlay__ {
> status = "okay";
> };
> };
> };
>
> /sys/devices/platform/bone-capemgr/slots:
> 0: PF---- -1
> 1: PF---- -1
> 2: PF---- -1
> 3: PF---- -1
> 5: P-O-L- 0 Override Board Name,00A0,Override Manuf,project
>
> From /sys/kernel/debug/pinctrl/44e10800.pinmux/pins
> ...
> pin 40 (44e108a0.0) 00000008 pinctrl-single
> pin 41 (44e108a4.0) 00000008 pinctrl-single
> pin 42 (44e108a8.0) 00000008 pinctrl-single
> pin 43 (44e108ac.0) 00000008 pinctrl-single
> ...
>
> Just saying I would expect these to be set to 0x05 instead of 0x00,
> Stranger yet, I'm sure there is some kind of non-obvious reason that in
> the overlay file, you reference the pin as offset 0x0a0/0x0a4 when their
> real offsets are 0x44310800... wait, i see it there.. nevermind.
> anyway should pins be showing the value of 8 instead of 5?
>
>
>
>
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