From: Arnd Bergmann <arnd@arndb.de>

max8971 is written to work with or without extcon, but it fails
to link when built-in when the extcon subsystem is in a loadable
module:

x86_64-linux-ld: drivers/power/supply/max8971_charger.o: in function `max8971_probe':
max8971_charger.c:(.text+0x2ab): undefined reference to `extcon_find_edev_by_node'

Add the appropriate dependency that allows the working cases but
prevents the link failure.

Fixes: 60cd40eee4f4 ("power: supply: Add support for Maxim MAX8971 charger")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/power/supply/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index 797c8d1b04aa..daab8214e225 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -621,6 +621,7 @@ config CHARGER_MAX77976
 config CHARGER_MAX8971
 	tristate "Maxim MAX8971 battery charger driver"
 	depends on I2C
+	depends on EXTCON || !EXTCON
 	select REGMAP_I2C
 	help
 	  The MAX8971 is a compact, high-frequency, high-efficiency switch-mode
-- 
2.39.5

On Sat, 03 May 2025 16:04:26 +0200, Arnd Bergmann wrote:
> max8971 is written to work with or without extcon, but it fails
> to link when built-in when the extcon subsystem is in a loadable
> module:
> 
> x86_64-linux-ld: drivers/power/supply/max8971_charger.o: in function `max8971_probe':
> max8971_charger.c:(.text+0x2ab): undefined reference to `extcon_find_edev_by_node'
> 
> [...]

Applied, thanks!

[1/1] power: supply: add EXTCON dependency
      commit: 1ea48c51f03fc3186ee0bcc05d06b652c209e0ae

Best regards,
-- 
Sebastian Reichel <sebastian.reichel@collabora.com>