Here is the dmesg output:
xsentius@beaglebone:~/attemp2/overlay$ dmesg | tail -n 16
[ 407.585016] bone-capemgr bone_capemgr.9: part_number 'EBB-PRU-Example',
version 'N/A'
[ 407.585197] bone-capemgr bone_capemgr.9: slot #7: generic override
[ 407.585242] bone-capemgr bone_capemgr.9: bone: Using override eeprom
data at slot 7
[ 407.585290] bone-capemgr bone_capemgr.9: slot #7: 'Override Board
Name,00A0,Override Manuf,EBB-PRU-Example'
[ 407.585560] bone-capemgr bone_capemgr.9: slot #7: Requesting part
number/version based 'EBB-PRU-Example-00A0.dtbo
[ 407.585608] bone-capemgr bone_capemgr.9: slot #7: Requesting firmware
'EBB-PRU-Example-00A0.dtbo' for board-name 'Override Board Name', version
'00A0'
[ 407.586139] bone-capemgr bone_capemgr.9: slot #7: dtbo
'EBB-PRU-Example-00A0.dtbo' loaded; converting to live tree
[ 407.592577] bone-capemgr bone_capemgr.9: slot #7: #3 overlays
[ 407.610703] omap_hwmod: pruss: failed to hardreset
[ 407.631137] gpio-of-helper gpio_helper.11: could not find pctldev for
node /ocp/i2c@44e0b000/tps@24/regulators/regulator@1, deferring probe
[ 407.637371] platform gpio_helper.11: Driver gpio-of-helper requests
probe deferral
[ 407.637787] bone-capemgr bone_capemgr.9: slot #7: Applied #3 overlays.
[ 407.720074] pruss_uio 4a300000.pruss: could not find pctldev for node /
ocp/interrupt-controller@48200000, deferring probe
[ 407.720133] pruss_uio 4a300000.pruss: pins are not configured from the
driver
[ 407.768723] gpio-of-helper gpio_helper.11: could not find pctldev for
node /ocp/i2c@44e0b000/tps@24/regulators/regulator@1, deferring probe
[ 407.768810] platform gpio_helper.11: Driver gpio-of-helper requests
probe deferral
On Monday, April 4, 2016 at 4:47:26 AM UTC+3, Xsentius wrote:
>
> Hello all,
>
> I am trying to load the sample overlay from Derek Molloy's book, here is
> the .dto file:
>
> /* Device Tree Overlay for enabling the pins that are used in Chapter 13
>> * This overlay is based on the BB-PRU-01 overlay
>> * Written by Derek Molloy for the book "Exploring BeagleBone: Tools and
>> * Techniques for Building with Embedded Linux" by John Wiley & Sons, 2014
>> * ISBN 9781118935125. Please see the file README.md in the repository root
>> * directory for copyright and GNU GPLv3 license information.
>> */
>> /dts-v1/;
>> /plugin/;
>> / {
>> compatible = "ti,beaglebone", "ti,beaglebone-black";
>> part-number = "EBB-PRU-Example";
>> version = "00A0";
>> /* This overlay uses the following resources */
>> exclusive-use =
>> "P9.11", "P9.13", "P9.27", "P9.28", "pru0";
>> fragment@0 {
>> target = <&am33xx_pinmux>;
>> __overlay__ {
>> gpio_pins: pinmux_gpio_pins { // The GPIO pins
>> pinctrl-single,pins = <
>> 0x070 0x07 // P9_11 MODE7 | OUTPUT | GPIO pull-down
>> 0x074 0x27 // P9_13 MODE7 | INPUT | GPIO pull-down
>> >;
>> };
>> pru_pru_pins: pinmux_pru_pru_pins { // The PRU pin modes
>> pinctrl-single,pins = <
>> 0x1a4 0x05 // P9_27 pr1_pru0_pru_r30_5, MODE5 | OUTPUT |
>> PRU
>> 0x19c 0x26 // P9_28 pr1_pru0_pru_r31_3, MODE6 | INPUT |
>> PRU
>> >;
>> };
>> };
>> };
>> fragment@1 { // Enable the PRUSS
>> target = <&pruss>;
>> __overlay__ {
>> status = "okay";
>> pinctrl-names = "default";
>> pinctrl-0 = <&pru_pru_pins>;
>> };
>> };
>> fragment@2 { // Enable the GPIOs
>> target = <&ocp>;
>> __overlay__ {
>> gpio_helper {
>> compatible = "gpio-of-helper";
>> status = "okay";
>> pinctrl-names = "default";
>> pinctrl-0 = <&gpio_pins>;
>> };
>> };
>> };
>> };
>>
>>
> First I compile it:
>
> dtc -O dtb -o EBB-PRU-Example-00A0.dtbo -b 0 -@ EBB-PRU-Example.dts
>
>
>
>
> and then as instructed I do:
> sudo cp EBB‐PRU‐Example‐00A0.dtbo /lib/firmware
> sudo sh ‐c "echo EBB‐PRU‐Example > $SLOTS"
>
> Now when I check $SLOTS:
>
> xsentius@beaglebone:~/attemp2/overlay$ cat $SLOTS
> 0: 54:PF---
> 1: 55:PF---
> 2: 56:PF---
> 3: 57:PF---
> 4: ff:P-O-- Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G
> 5: ff:P-O-- Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI
> 6: ff:P-O-- Bone-Black-HDMIN,00A0,Texas Instrument,BB-BONELT-HDMIN
> 7: ff:P-O-L Override Board Name,00A0,Override Manuf,EBB-PRU-Example
>
>
> I can see it is loaded successfully, however when I check $PINS:
>
>
>
>
> xsentius@beaglebone:~/attemp2/overlay$ sudo cat $PINS|grep '103\|105'
> pin 103 (44e1099c) 00000027 pinctrl-single
> pin 105 (44e109a4) 00000027 pinctrl-single
>
>
> I see that their values are not changed. They should be equal to 26 and 5.
>
> What do you think the problem might be?
>
>
> Thanks
>
>
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