adafruit-mirror/zephyr
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions 9

boards: imx93_evk: add overlay to connect user button to pcal6524

Browse source 
Apply this overlay to test RFU_BTN1 and RFU_BTN2 on PCAL6524.

The user buttons RFU_BTN1 and RFU_BTN2 is connected to i.MX 93 GPIO by
default, but can be changed to connect to onboard GPIO expander
PCAL6524. To do this, switch SW1006 to 0000, then switch SW1005 to 0101.

Signed-off-by: Chekhov Ma <chekhov.ma@nxp.com>
This commit is contained in:
Chekhov Ma 2024-09-19 15:54:44 +08:00 committed by Alberto Escolar
parent a3f863e3f1
commit 10ab352478
2 changed files with 55 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

22
boards/nxp/imx93_evk/doc/index.rst
View file

@ -140,6 +140,28 @@ over dts config. For instance, if ``CONFIG_CAN`` is enabled, MUX A is selected
even if ``mux="B";`` is configured in dts, and an warning would be reported in
the log.
User Button GPIO Option
--------------------------
The user buttons RFU_BTN1 and RFU_BTN2 is connected to i.MX 93 GPIO by default,
but can be changed to connect to onboard GPIO expander PCAL6524 with on-board DIP
switches. To do this, switch SW1006 to 0000, then switch SW1005 to 0101. An devicetree
overlay is included to support this.
Run following command to test user buttons on PCAL6524:
.. zephyr-app-commands::
:zephyr-app: samples/basic/button
:host-os: unix
:board: imx93_evk/mimx9352/a55
:goals: build
:gen-args: -DEXTRA_DTC_OVERLAY_FILE=imx93_evk_mimx9352_exp_btn.overlay
Run the app, press RFU_BTN1 and the red LED turns on accordingly.
Note: The overlay only supports ``mimx9352/a55``, but can be extended to support
``mimx9352/m33`` if I2C and PCAL6524 is enabled.
Programming and Debugging (A55)
*******************************

33
boards/nxp/imx93_evk/dts/imx93_evk_mimx9352_exp_btn.overlay Normal file
View file

@ -0,0 +1,33 @@
/*
* Copyright 2024 NXP
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* Apply this overlay to test RFU_BTN1 and RFU_BTN2 on PCAL6524.
*
* The user buttons RFU_BTN1 and RFU_BTN2 is connected to i.MX 93 GPIO by default,
* but can be changed to connect to onboard GPIO expander PCAL6524. To do this,
* switch SW1006 to 0000, then switch SW1005 to 0101.
*/
/* Remove default keys */
/delete-node/ &btn_1;
/delete-node/ &btn_2;
/ {
keys {
compatible = "gpio-keys";
btn_1: btn_1{
label = "BTN1";
gpios = <&gpio_exp1 5 GPIO_ACTIVE_LOW>;
};
btn_2: btn_2{
label = "BTN2";
gpios = <&gpio_exp1 6 GPIO_ACTIVE_LOW>;
};
};
};