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

boards: shields: lcd_par_s035: enable reset gpio within input module

Browse source 
The LCD_PAR_S035 display module shares the reset pin between the display
module and the touchscreen controller. The touchscreen controller needs
the reset pin to be toggled low during boot in order to select the
expected I2C address. However, the reset sequence must occur before the
display is initialized. To enable this, set a custom INPUT driver init
priority when using this display module, so that INPUT drivers start
after MIPI DBI drivers but before DISPLAY drivers.

Since the reset sequence is now operating as expected, we no longer need
to use the alt-addr probing method. This method was previously only
working correctly because boards using this display were configuring
the display INT pin using the pin control API prior to resetting the
display, so when the display was reset it would select the alt-addr
I2C address.

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
This commit is contained in:
Daniel DeGrasse 2024-08-26 15:58:32 +00:00 committed by Fabio Baltieri
parent 22a922fded
commit f8f70c2ac7
2 changed files with 10 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
boards/shields/lcd_par_s035/Kconfig.defconfig
View file

@ -28,4 +28,13 @@ config INPUT_GT911_INTERRUPT
endif # LVGL
if INPUT
# GT911 driver drives reset pin low, so it needs to initialize before
# the display driver but after the MIPI DBI driver
config INPUT_INIT_PRIORITY
default 82
endif # INPUT
endif # SHIELD_LCD_PAR_S035

2
boards/shields/lcd_par_s035/lcd_par_s035_8080.overlay
View file

@ -24,8 +24,8 @@
gt911_lcd_par_s035: gt911-lcd_par_s035@5d {
compatible = "goodix,gt911";
reg = <0x5d>;
alt-addr = <0x14>;
irq-gpios = <&nxp_lcd_8080_connector 9 GPIO_ACTIVE_HIGH>;
reset-gpios = <&nxp_lcd_8080_connector 11 GPIO_ACTIVE_LOW>;
};
};