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staging/olpc_dcon: fix kconfig to fix build errors

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Fix build errors when GPIO_CS5535=m and FB_OLPC_DCON=y
by preventing that kconfig combination.

These build errors are caused by having a kconfig bool symbol
(FB_OLPC_DCON_1) that depend on a tristate symbol (GPIO_CS5535),
but when the tristate symbol is =m, the bool symbol is =y.

  drivers/built-in.o: In function `dcon_read_status_xo_1':
  olpc_dcon_xo_1.c:(.text+0x359531): undefined reference to `cs5535_gpio_set'
  drivers/built-in.o: In function `dcon_wiggle_xo_1':
  olpc_dcon_xo_1.c:(.text+0x35959f): undefined reference to `cs5535_gpio_set'
  olpc_dcon_xo_1.c:(.text+0x359610): undefined reference to `cs5535_gpio_clear'
  drivers/built-in.o:olpc_dcon_xo_1.c:(.text+0x3596a1): more undefined references to `cs5535_gpio_clear' follow
  drivers/built-in.o: In function `dcon_wiggle_xo_1':
  olpc_dcon_xo_1.c:(.text+0x359708): undefined reference to `cs5535_gpio_set'
  drivers/built-in.o: In function `dcon_init_xo_1':
  olpc_dcon_xo_1.c:(.text+0x35989b): undefined reference to `cs5535_gpio_clear'
  olpc_dcon_xo_1.c:(.text+0x3598b5): undefined reference to `cs5535_gpio_isset'
  olpc_dcon_xo_1.c:(.text+0x359963): undefined reference to `cs5535_gpio_setup_event'
  olpc_dcon_xo_1.c:(.text+0x359980): undefined reference to `cs5535_gpio_set_irq'
  olpc_dcon_xo_1.c:(.text+0x359a36): undefined reference to `cs5535_gpio_set'

However, adding GPIO_CS5535 to the Kconfig dependencies also creates
a kconfig recursive dependency error on powerpc:
  drivers/i2c/Kconfig:5:error: recursive dependency detected!
  drivers/i2c/Kconfig:5:	symbol I2C is selected by FB_OLPC_DCON
  drivers/staging/olpc_dcon/Kconfig:1:	symbol FB_OLPC_DCON depends on GPIO_CS5535
  drivers/gpio/Kconfig:577:	symbol GPIO_CS5535 depends on GPIOLIB
  drivers/gpio/Kconfig:38:	symbol GPIOLIB is selected by ARCH_REQUIRE_GPIOLIB
  drivers/gpio/Kconfig:23:	symbol ARCH_REQUIRE_GPIOLIB is selected by MCU_MPC8349EMITX
  arch/powerpc/platforms/Kconfig:351:	symbol MCU_MPC8349EMITX depends on I2C

This is due to FB_OLPC_DCON selecting I2C instead of depending on it,
so change the select to a dependency.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc:	Daniel Drake <dsd@laptop.org>
Cc:	Jens Frederich <jfrederich@gmail.com>
Cc:	Jon Nettleton <jon.nettleton@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Randy Dunlap 2013-10-13 12:30:00 -07:00 committed by Greg Kroah-Hartman
parent fcd70b4b08
commit d6ae99d04e
1 changed files with 2 additions and 1 deletions
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3
drivers/staging/olpc_dcon/Kconfig
View File

@ -1,7 +1,8 @@
config FB_OLPC_DCON
tristate "One Laptop Per Child Display CONtroller support"
depends on OLPC && FB
select I2C
depends on I2C
depends on (GPIO_CS5535 || GPIO_CS5535=n)
select BACKLIGHT_CLASS_DEVICE
---help---
In order to support very low power operation, the XO laptop uses a