• State TI Thinks Resolved
  • Locked Locked
  • Replies 6 replies
  • Answers 2 answers
  • Subscribers 101 subscribers
  • Views 1116 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Original question:

AM437x EVM SDK

Linux/PROCESSOR-SDK-AM437X: Device tree syntax error

Zhiwei Wang
Intellectual 450 points
Part Number: PROCESSOR-SDK-AM437X
Other Parts Discussed in Thread: AM4372

Tool/software: Linux

Hi,

I have the dts file looks like this:

#include "am4372.dtsi"
#include <dt-bindings/pinctrl/am43xx.h>
#include <dt-bindings/pwm/pwm.h>
#include <dt-bindings/gpio/gpio.h>

&spi2 {
pinctrl-0 = <&spi2_pins>;
status = "okay";

spidev@0 {
compatible = "ti,tianma";
spi-max-frequency = <24000000>;
reg = <0>;
};

lcdReset-gpios = <&gpio5 4 GPIO_ACTIVE_LOW>;
};

however, the compiler says the line lcdReset-gpios has error. and I do not see syntax error here. no matter where I move this line to, the error follows until I remove this line. Where did I do wrong.

Thanks

  • 0
    TI__Guru**** 170625 points

    Hi Wang,

    Do you use AM437x TI PSDK v4.03?

    We do not have "lcdReset-gpios" DTS entry available to use. You should use "reset-gpios" and/or "enable-gpios" DTS entries. And you should use these entries inside the LCD node. See for example below DTS file:

    linux-4.9.69/arch/arm/boot/dts/am437x-sk-evm.dts

    lcd0: display {
    compatible = "newhaven,nhd-4.3-480272ef-atxl", "panel-dpi";
    label = "lcd";

    enable-gpios = <&gpio1 7 GPIO_ACTIVE_HIGH>;


    edt-ft5306@38 {
    status = "okay";
    compatible = "edt,edt-ft5306", "edt,edt-ft5x06";

    reset-gpios = <&gpio1 28 GPIO_ACTIVE_LOW>;



    Regards,
    Pavel

  • 0 in reply to Pavel Botev
    Intellectual 450 points
    Hi, Pavel,

    Thanks for reply. Yes, we are using AM437x TI sdk v 4.03.05 as reference design.

    The purpose of the GPIO is we added a LCD reset pin which use GPIO5_4. However the compiler complains about syntax error on the line where I specify the gpios.

    Any thoughts?
  • 0 in reply to Zhiwei Wang
    Intellectual 450 points
    The gcc version is 5.4.0
  • 0 in reply to Zhiwei Wang
    TI__Guru**** 170625 points

    Zhiwei Wang said:
    The purpose of the GPIO is we added a LCD reset pin which use GPIO5_4. However the compiler complains about syntax error on the line where I specify the gpios.

    Any thoughts?

    We do not have "lcdReset-gpios" DTS entry available to use. You should use "reset-gpios" and/or "enable-gpios" DTS entries. And you should use these entries inside the LCD node.

  • 0 in reply to Zhiwei Wang
    TI__Guru**** 170625 points

    Zhiwei Wang said:
    The gcc version is 5.4.0

    You should use 6.2.1. This is the version that comes with PSDK v4.03:

    ti-processor-sdk-linux-am437x-evm-04.03.00.05/linux-devkit/sysroots/x86_64-arago-linux/usr/bin/arm-linux-gnueabihf-gcc-6.2.1

    Regards,
    Pavel

  • 0
    TI__Genius 13567 points
    Zhiwei,

    reset-gpios and enable-gpios are key words that you need to use