SIMPLE_PANEL currently only depends on PANEL && BACKLIGHT, but the code makes references to dm_gpio_set_value and gpio_request_by_name. These are defined in drivers/gpio/gpio-uclass.c, so a dependency on DM_GPIO corrects these link errors:
aarch64-linux-gnu-ld.bfd: drivers/built-in.o: in function `simple_panel_set_backlight': /home/kameliya/u-boot/drivers/video/simple_panel.c:42: undefined reference to `dm_gpio_set_value' aarch64-linux-gnu-ld.bfd: drivers/built-in.o: in function `simple_panel_enable_backlight': /home/kameliya/u-boot/drivers/video/simple_panel.c:27: undefined reference to `dm_gpio_set_value' aarch64-linux-gnu-ld.bfd: drivers/built-in.o: in function `simple_panel_of_to_plat': /home/kameliya/u-boot/drivers/video/simple_panel.c:72: undefined reference to `gpio_request_by_name'
This issue is only exposed if you have a board which enables CONFIG_DM_VIDEO without CONFIG_DM_GPIO; so far, none do, but soon a QEMU board may.
Signed-off-by: Asherah Connor ashe@kivikakk.ee
---
drivers/video/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index 667157c2e9..220c008f8a 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -209,7 +209,7 @@ config PANEL
config SIMPLE_PANEL bool "Enable simple panel support" - depends on PANEL && BACKLIGHT + depends on PANEL && BACKLIGHT && DM_GPIO default y help This turns on a simple panel driver that enables a compatible