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leds: rt8515: add V4L2_FLASH_LED_CLASS dependency

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The leds-rt8515 driver can optionall use the v4l2 flash led class,
but it causes a link error when that class is in a loadable module
and the rt8515 driver itself is built-in:

ld.lld: error: undefined symbol: v4l2_flash_init
>>> referenced by leds-rt8515.c
>>>               leds/flash/leds-rt8515.o:(rt8515_probe) in archive
drivers/built-in.a

Adding 'depends on V4L2_FLASH_LED_CLASS' in Kconfig would avoid that,
but it would make it impossible to use the driver without the
v4l2 support.

Add the same dependency that the other users of this class have
instead, which just prevents the broken configuration.

Fixes: e1c6edcbea ("leds: rt8515: Add Richtek RT8515 LED driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
This commit is contained in:
Arnd Bergmann 2021-02-04 16:39:44 +01:00 committed by Pavel Machek
parent 92bf22614b
commit dbeb02a0bc
1 changed files with 1 additions and 0 deletions
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drivers/leds/flash/Kconfig
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@ -5,6 +5,7 @@ if LEDS_CLASS_FLASH
config LEDS_RT8515
tristate "LED support for Richtek RT8515 flash/torch LED"
depends on GPIOLIB
depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS
help
This option enables support for the Richtek RT8515 flash
and torch LEDs found on some mobile phones.