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fbdev: sis: enforce selection of at least one backend 

The sis framebuffer driver complains with a compile-time warning
if neither the FB_SIS_300 nor FB_SIS_315 symbols are selected:

drivers/video/fbdev/sis/sis_main.c:61:2: warning: #warning Neither CONFIG_FB_SIS_300 nor CONFIG_FB_SIS_315 is se

This is reasonable because it doesn't work in that case, but it's
also annoying for randconfig builds and is one of the most common
warnings I'm seeing on ARM now.

This changes the Kconfig logic to prevent the silly configuration,
by always selecting the FB_SIS_300 variant if the other one is
not set.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Arnd Bergmann 2015-11-27 15:33:11 +01:00 committed by Tomi Valkeinen
parent 34280340b1
commit 5b833fea43
1 changed files with 1 additions and 0 deletions
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drivers/video/fbdev/Kconfig
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@ -1506,6 +1506,7 @@ config FB_SIS
select FB_CFB_COPYAREA
select FB_CFB_IMAGEBLIT
select FB_BOOT_VESA_SUPPORT if FB_SIS = y
select FB_SIS_300 if !FB_SIS_315
help
This is the frame buffer device driver for the SiS 300, 315, 330
and 340 series as well as XGI V3XT, V5, V8, Z7 graphics chipsets.