mfd: Combine MFD_SUPPORT and MFD_CORE

Commit Message

Luciano Coelho Aug. 29, 2011, 6:41 p.m. UTC

From: Randy Dunlap <[e-mail]>

Combine MFD_SUPPORT (which only enabled the remainder of the MFD
menu) and MFD_CORE.  This allows other drivers to select MFD_CORE
without needing to also select MFD_SUPPORT, which fixes some
kconfig unmet dependency warnings.  Modeled after I2C kconfig.

[Forward-ported to 3.1-rc4.  This fixes a warning when some drivers,
such as RADIO_WL1273, are selected, but MFD_SUPPORT is not. -- Luca]

Signed-off-by: Randy Dunlap <[e-mail]>
Reported-by: Johannes Berg <[e-mail]>
Cc: Jean Delvare <[e-mail]>
Cc: Tony Lindgren <[e-mail]>
Cc: Grant Likely <[e-mail]>
Signed-off-by: Luciano Coelho <[e-mail]>
---

I guess this should fix the problem.  I've simple forward-ported
Randy's patch to the latest mainline kernel.  I don't know via which
tree this should go in, though.

NOTE: I have *not* tested this very thoroughly.  But at least
omap2plus stuff seems to work okay with this change.  MFD_SUPPORT is
also selected by a couple of "tile" platforms defconfigs, but I guess
the Kconfig system should take care of it.

 arch/arm/mach-omap2/Kconfig |    2 +-
 drivers/gpio/Kconfig        |    3 +-
 drivers/mfd/Kconfig         |   54 +++---------------------------------------
 3 files changed, 6 insertions(+), 53 deletions(-)

Comments

Arnd Bergmann Aug. 31, 2011, 4:49 p.m. UTC | #1

On Monday 29 August 2011, Luciano Coelho wrote:
> From: Randy Dunlap <[e-mail]>
> 
> Combine MFD_SUPPORT (which only enabled the remainder of the MFD
> menu) and MFD_CORE.  This allows other drivers to select MFD_CORE
> without needing to also select MFD_SUPPORT, which fixes some
> kconfig unmet dependency warnings.  Modeled after I2C kconfig.
> 
> [Forward-ported to 3.1-rc4.  This fixes a warning when some drivers,
> such as RADIO_WL1273, are selected, but MFD_SUPPORT is not. -- Luca]
> 
> Signed-off-by: Randy Dunlap <[e-mail]>
> Reported-by: Johannes Berg <[e-mail]>
> Cc: Jean Delvare <[e-mail]>
> Cc: Tony Lindgren <[e-mail]>
> Cc: Grant Likely <[e-mail]>
> Signed-off-by: Luciano Coelho <[e-mail]>
> ---
> 
> I guess this should fix the problem.  I've simple forward-ported
> Randy's patch to the latest mainline kernel.  I don't know via which
> tree this should go in, though.
> 
> NOTE: I have not tested this very thoroughly.  But at least
> omap2plus stuff seems to work okay with this change.  MFD_SUPPORT is
> also selected by a couple of "tile" platforms defconfigs, but I guess
> the Kconfig system should take care of it.

Doing this is a good idea, but incidentally I have just spent some time
with the same problem and ended up with a solution that I like better,
which is removing CONFIG_MFD_SUPPORT altogether.

The point is that there is no use enabling MFD_CORE if you don't also
enable any of the specific drivers. MFD_SUPPORT was added as a 'menuconfig'
before we had Kconfig warn about broken dependencies, so everything was
fine. Since Kconfig now issues the warnings, I think it would be better
to just turn the MFD menu into a plain 'menu' and remove all the
'depends on MFD_SUPPORT' and 'select MFD_SUPPORT' lines from the other
Kconfig files.

	Arnd
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Luciano Coelho Sept. 2, 2011, 11:54 a.m. UTC | #2

On Wed, 2011-08-31 at 18:49 +0200, Arnd Bergmann wrote: 
> On Monday 29 August 2011, Luciano Coelho wrote:
> > From: Randy Dunlap <[e-mail]>
> > 
> > Combine MFD_SUPPORT (which only enabled the remainder of the MFD
> > menu) and MFD_CORE.  This allows other drivers to select MFD_CORE
> > without needing to also select MFD_SUPPORT, which fixes some
> > kconfig unmet dependency warnings.  Modeled after I2C kconfig.
> > 
> > [Forward-ported to 3.1-rc4.  This fixes a warning when some drivers,
> > such as RADIO_WL1273, are selected, but MFD_SUPPORT is not. -- Luca]
> > 
> > Signed-off-by: Randy Dunlap <[e-mail]>
> > Reported-by: Johannes Berg <[e-mail]>
> > Cc: Jean Delvare <[e-mail]>
> > Cc: Tony Lindgren <[e-mail]>
> > Cc: Grant Likely <[e-mail]>
> > Signed-off-by: Luciano Coelho <[e-mail]>
> > ---
> > 
> > I guess this should fix the problem.  I've simple forward-ported
> > Randy's patch to the latest mainline kernel.  I don't know via which
> > tree this should go in, though.
> > 
> > NOTE: I have not tested this very thoroughly.  But at least
> > omap2plus stuff seems to work okay with this change.  MFD_SUPPORT is
> > also selected by a couple of "tile" platforms defconfigs, but I guess
> > the Kconfig system should take care of it.
> 
> Doing this is a good idea, but incidentally I have just spent some time
> with the same problem and ended up with a solution that I like better,
> which is removing CONFIG_MFD_SUPPORT altogether.
> 
> The point is that there is no use enabling MFD_CORE if you don't also
> enable any of the specific drivers. MFD_SUPPORT was added as a 'menuconfig'
> before we had Kconfig warn about broken dependencies, so everything was
> fine. Since Kconfig now issues the warnings, I think it would be better
> to just turn the MFD menu into a plain 'menu' and remove all the
> 'depends on MFD_SUPPORT' and 'select MFD_SUPPORT' lines from the other
> Kconfig files.

Yes, this makes sense.  I think your solution is indeed cleaner.  If you
want to send it it's fine with me.  I don't really have any preference,
I just wanted to clean a problem that was reported to me. ;)

If you send your changes, my patch can be ignored, otherwise, I can send
a v2 with the changes Jean proposed.

Jean Delvare Sept. 2, 2011, 12:37 p.m. UTC | #3

Hi Arnd,

On Wed, 31 Aug 2011 18:49:37 +0200, Arnd Bergmann wrote:
> On Monday 29 August 2011, Luciano Coelho wrote:
> > From: Randy Dunlap <[e-mail]>
> > 
> > Combine MFD_SUPPORT (which only enabled the remainder of the MFD
> > menu) and MFD_CORE.  This allows other drivers to select MFD_CORE
> > without needing to also select MFD_SUPPORT, which fixes some
> > kconfig unmet dependency warnings.  Modeled after I2C kconfig.
> > 
> > [Forward-ported to 3.1-rc4.  This fixes a warning when some drivers,
> > such as RADIO_WL1273, are selected, but MFD_SUPPORT is not. -- Luca]
> > 
> > Signed-off-by: Randy Dunlap <[e-mail]>
> > Reported-by: Johannes Berg <[e-mail]>
> > Cc: Jean Delvare <[e-mail]>
> > Cc: Tony Lindgren <[e-mail]>
> > Cc: Grant Likely <[e-mail]>
> > Signed-off-by: Luciano Coelho <[e-mail]>
> > ---
> > 
> > I guess this should fix the problem.  I've simple forward-ported
> > Randy's patch to the latest mainline kernel.  I don't know via which
> > tree this should go in, though.
> > 
> > NOTE: I have not tested this very thoroughly.  But at least
> > omap2plus stuff seems to work okay with this change.  MFD_SUPPORT is
> > also selected by a couple of "tile" platforms defconfigs, but I guess
> > the Kconfig system should take care of it.
> 
> Doing this is a good idea, but incidentally I have just spent some time
> with the same problem and ended up with a solution that I like better,
> which is removing CONFIG_MFD_SUPPORT altogether.
> 
> The point is that there is no use enabling MFD_CORE if you don't also
> enable any of the specific drivers.

Same holds for pretty much every subsystem, right?

> MFD_SUPPORT was added as a 'menuconfig'
> before we had Kconfig warn about broken dependencies, so everything was
> fine. Since Kconfig now issues the warnings, I think it would be better
> to just turn the MFD menu into a plain 'menu' and remove all the
> 'depends on MFD_SUPPORT' and 'select MFD_SUPPORT' lines from the other
> Kconfig files.

This would make it impossible to turn off all MFD drivers at once. I
think this is considered a feature, at least I find it very convenient
to be able to "kill" a subsystem completely. And in the past few years
many subsystems were turned from menu to menuconfig for this reason.
But maybe MFD is a special case here.

Anyway, if you want your patch to be applied, you'll have to send it
for review first, as at this point all we have is Luciano's proposal.

Arnd Bergmann Sept. 2, 2011, 3:49 p.m. UTC | #4

On Friday 02 September 2011, Jean Delvare wrote:
> > Doing this is a good idea, but incidentally I have just spent some time
> > with the same problem and ended up with a solution that I like better,
> > which is removing CONFIG_MFD_SUPPORT altogether.
> > 
> > The point is that there is no use enabling MFD_CORE if you don't also
> > enable any of the specific drivers.
> 
> Same holds for pretty much every subsystem, right?

I think not: MFD is a bit different from other subsystems in that it does
not have a user space interface by itself. It's also different from bus
drivers in that it is not specific to some particular class of hardware,
since it only abstracts devices that do multiple things independent of
how they do them.

It is similar to MISC_DEVICES (drivers/misc) in some regards, and I
would also like to turn that one back from menuconfig into menu for
the same reasons.

> > MFD_SUPPORT was added as a 'menuconfig'
> > before we had Kconfig warn about broken dependencies, so everything was
> > fine. Since Kconfig now issues the warnings, I think it would be better
> > to just turn the MFD menu into a plain 'menu' and remove all the
> > 'depends on MFD_SUPPORT' and 'select MFD_SUPPORT' lines from the other
> > Kconfig files.
> 
> This would make it impossible to turn off all MFD drivers at once. I
> think this is considered a feature, at least I find it very convenient
> to be able to "kill" a subsystem completely. And in the past few years
> many subsystems were turned from menu to menuconfig for this reason.
> But maybe MFD is a special case here.

I agree that it's convenient for a lot of subsystems to be able to
turn them off entirely, but in case of MFD and MISC, I cannot see a clear
use case for that.

> Anyway, if you want your patch to be applied, you'll have to send it
> for review first, as at this point all we have is Luciano's proposal.

Ok. I had actually meant to send this mail out before the patches, but
apparently it got stuck in my mail client.

	Arnd
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Patch

diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
index 57b66d5..1046923 100644
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -14,7 +14,7 @@  config ARCH_OMAP2PLUS_TYPICAL
 	select SERIAL_OMAP_CONSOLE
 	select I2C
 	select I2C_OMAP
-	select MFD_SUPPORT
+	select MFD_CORE
 	select MENELAUS if ARCH_OMAP2
 	select TWL4030_CORE if ARCH_OMAP3 || ARCH_OMAP4
 	select TWL4030_POWER if ARCH_OMAP3 || ARCH_OMAP4
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index d539efd..fbc5fd4 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -180,7 +180,7 @@  config GPIO_SCH
 
 config GPIO_VX855
 	tristate "VIA VX855/VX875 GPIO"
-	depends on MFD_SUPPORT && PCI
+	depends on PCI
 	select MFD_CORE
 	select MFD_VX855
 	help
@@ -417,7 +417,6 @@  config GPIO_TIMBERDALE
 config GPIO_RDC321X
 	tristate "RDC R-321x GPIO support"
 	depends on PCI
-	select MFD_SUPPORT
 	select MFD_CORE
 	select MFD_RDC321X
 	help
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 21574bd..1836cdf 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -2,10 +2,9 @@ 
 # Multifunction miscellaneous devices
 #
 
-menuconfig MFD_SUPPORT
-	bool "Multifunction device drivers"
+menuconfig MFD_CORE
+	tristate "Multifunction device drivers"
 	depends on HAS_IOMEM
-	default y
 	help
 	  Multifunction devices embed several functions (e.g. GPIOs,
 	  touchscreens, keyboards, current regulators, power management chips,
@@ -18,16 +17,11 @@  menuconfig MFD_SUPPORT
 
 	  This option alone does not add any kernel code.
 
-if MFD_SUPPORT
-
-config MFD_CORE
-	tristate
-	default n
+if MFD_CORE
 
 config MFD_88PM860X
 	bool "Support Marvell 88PM8606/88PM8607"
 	depends on I2C=y && GENERIC_HARDIRQS
-	select MFD_CORE
 	help
 	  This supports for Marvell 88PM8606/88PM8607 Power Management IC.
 	  This includes the I2C driver and the core APIs _only_, you have to
@@ -55,14 +49,12 @@  config MFD_SM501_GPIO
 config MFD_ASIC3
 	bool "Support for Compaq ASIC3"
 	depends on GENERIC_HARDIRQS && GPIOLIB && ARM
-	select MFD_CORE
 	 ---help---
 	  This driver supports the ASIC3 multifunction chip found on many
 	  PDAs (mainly iPAQ and HTC based ones)
 
 config MFD_DAVINCI_VOICECODEC
 	tristate
-	select MFD_CORE
 
 config MFD_DM355EVM_MSP
 	bool "DaVinci DM355 EVM microcontroller"
@@ -75,7 +67,6 @@  config MFD_DM355EVM_MSP
 config MFD_TI_SSP
 	tristate "TI Sequencer Serial Port support"
 	depends on ARCH_DAVINCI_TNETV107X
-	select MFD_CORE
 	---help---
 	  Say Y here if you want support for the Sequencer Serial Port
 	  in a Texas Instruments TNETV107X SoC.
@@ -93,7 +84,6 @@  config HTC_EGPIO
 
 config HTC_PASIC3
 	tristate "HTC PASIC3 LED/DS1WM chip support"
-	select MFD_CORE
 	help
 	  This core driver provides register access for the LED/DS1WM
 	  chips labeled "AIC2" and "AIC3", found on HTC Blueangel and
@@ -124,7 +114,6 @@  config TPS6105X
 	tristate "TPS61050/61052 Boost Converters"
 	depends on I2C
 	select REGULATOR
-	select MFD_CORE
 	select REGULATOR_FIXED_VOLTAGE
 	help
 	  This option enables a driver for the TP61050/TPS61052
@@ -147,7 +136,6 @@  config TPS65010
 
 config TPS6507X
 	tristate "TPS6507x Power Management / Touch Screen chips"
-	select MFD_CORE
 	depends on I2C
 	help
 	  If you say yes here you get support for the TPS6507x series of
@@ -160,7 +148,6 @@  config TPS6507X
 config MFD_TPS6586X
 	bool "TPS6586x Power Management chips"
 	depends on I2C=y && GPIOLIB && GENERIC_HARDIRQS
-	select MFD_CORE
 	help
 	  If you say yes here you get support for the TPS6586X series of
 	  Power Management chips.
@@ -174,7 +161,6 @@  config MFD_TPS6586X
 config MFD_TPS65910
 	bool "TPS65910 Power Management chip"
 	depends on I2C=y && GPIOLIB
-	select MFD_CORE
 	select GPIO_TPS65910
 	help
 	  if you say yes here you get support for the TPS65910 series of
@@ -186,7 +172,6 @@  config MFD_TPS65912
 
 config MFD_TPS65912_I2C
 	bool "TPS95612 Power Management chip with I2C"
-	select MFD_CORE
 	select MFD_TPS65912
 	depends on I2C=y && GPIOLIB
 	help
@@ -195,7 +180,6 @@  config MFD_TPS65912_I2C
 
 config MFD_TPS65912_SPI
 	bool "TPS65912 Power Management chip with SPI"
-	select MFD_CORE
 	select MFD_TPS65912
 	depends on SPI_MASTER && GPIOLIB
 	help
@@ -252,7 +236,6 @@  config TWL4030_POWER
 config MFD_TWL4030_AUDIO
 	bool
 	depends on TWL4030_CORE
-	select MFD_CORE
 	default n
 
 config TWL6030_PWM
@@ -267,13 +250,11 @@  config TWL6030_PWM
 config TWL6040_CORE
 	bool
 	depends on TWL4030_CORE && GENERIC_HARDIRQS
-	select MFD_CORE
 	default n
 
 config MFD_STMPE
 	bool "Support STMicroelectronics STMPE"
 	depends on I2C=y && GENERIC_HARDIRQS
-	select MFD_CORE
 	help
 	  Support for the STMPE family of I/O Expanders from
 	  STMicroelectronics.
@@ -296,7 +277,6 @@  config MFD_STMPE
 config MFD_TC3589X
 	bool "Support Toshiba TC35892 and variants"
 	depends on I2C=y && GENERIC_HARDIRQS
-	select MFD_CORE
 	help
 	  Support for the Toshiba TC35892 and variants I/O Expander.
 
@@ -311,7 +291,6 @@  config MFD_TMIO
 config MFD_T7L66XB
 	bool "Support Toshiba T7L66XB"
 	depends on ARM && HAVE_CLK
-	select MFD_CORE
 	select MFD_TMIO
 	help
 	  Support for Toshiba Mobile IO Controller T7L66XB
@@ -319,7 +298,6 @@  config MFD_T7L66XB
 config MFD_TC6387XB
 	bool "Support Toshiba TC6387XB"
 	depends on ARM && HAVE_CLK
-	select MFD_CORE
 	select MFD_TMIO
 	help
 	  Support for Toshiba Mobile IO Controller TC6387XB
@@ -327,7 +305,6 @@  config MFD_TC6387XB
 config MFD_TC6393XB
 	bool "Support Toshiba TC6393XB"
 	depends on GPIOLIB && ARM
-	select MFD_CORE
 	select MFD_TMIO
 	help
 	  Support for Toshiba Mobile IO Controller TC6393XB
@@ -356,7 +333,6 @@  config PMIC_ADP5520
 config MFD_MAX8925
 	bool "Maxim Semiconductor MAX8925 PMIC Support"
 	depends on I2C=y && GENERIC_HARDIRQS
-	select MFD_CORE
 	help
 	  Say yes here to support for Maxim Semiconductor MAX8925. This is
 	  a Power Management IC. This driver provies common support for
@@ -366,7 +342,6 @@  config MFD_MAX8925
 config MFD_MAX8997
 	bool "Maxim Semiconductor MAX8997/8966 PMIC Support"
 	depends on I2C=y && GENERIC_HARDIRQS
-	select MFD_CORE
 	help
 	  Say yes here to support for Maxim Semiconductor MAX8998/8966.
 	  This is a Power Management IC with RTC, Flash, Fuel Gauge, Haptic,
@@ -378,7 +353,6 @@  config MFD_MAX8997
 config MFD_MAX8998
 	bool "Maxim Semiconductor MAX8998/National LP3974 PMIC Support"
 	depends on I2C=y && GENERIC_HARDIRQS
-	select MFD_CORE
 	help
 	  Say yes here to support for Maxim Semiconductor MAX8998 and
 	  National Semiconductor LP3974. This is a Power Management IC.
@@ -388,7 +362,6 @@  config MFD_MAX8998
 
 config MFD_WM8400
 	tristate "Support Wolfson Microelectronics WM8400"
-	select MFD_CORE
 	depends on I2C
 	help
 	  Support for the Wolfson Microelecronics WM8400 PMIC and audio
@@ -402,7 +375,6 @@  config MFD_WM831X
 
 config MFD_WM831X_I2C
 	bool "Support Wolfson Microelectronics WM831x/2x PMICs with I2C"
-	select MFD_CORE
 	select MFD_WM831X
 	depends on I2C=y && GENERIC_HARDIRQS
 	help
@@ -413,7 +385,6 @@  config MFD_WM831X_I2C
 
 config MFD_WM831X_SPI
 	bool "Support Wolfson Microelectronics WM831x/2x PMICs with SPI"
-	select MFD_CORE
 	select MFD_WM831X
 	depends on SPI_MASTER && GENERIC_HARDIRQS
 	help
@@ -487,7 +458,6 @@  config MFD_WM8350_I2C
 
 config MFD_WM8994
 	bool "Support Wolfson Microelectronics WM8994"
-	select MFD_CORE
 	depends on I2C=y && GENERIC_HARDIRQS
 	help
 	  The WM8994 is a highly integrated hi-fi CODEC designed for
@@ -526,7 +496,6 @@  config MFD_MC13783
 config MFD_MC13XXX
 	tristate "Support Freescale MC13783 and MC13892"
 	depends on SPI_MASTER
-	select MFD_CORE
 	select MFD_MC13783
 	help
 	  Support for the Freescale (Atlas) PMIC and audio CODECs
@@ -548,7 +517,6 @@  config ABX500_CORE
 config AB3100_CORE
 	bool "ST-Ericsson AB3100 Mixed Signal Circuit core functions"
 	depends on I2C=y && ABX500_CORE
-	select MFD_CORE
 	default y if ARCH_U300
 	help
 	  Select this to enable the AB3100 Mixed Signal IC core
@@ -579,7 +547,6 @@  config EZX_PCAP
 config AB8500_CORE
 	bool "ST-Ericsson AB8500 Mixed Signal Power Management chip"
 	depends on GENERIC_HARDIRQS && ABX500_CORE
-	select MFD_CORE
 	help
 	  Select this option to enable access to AB8500 power management
 	  chip. This connects to U8500 either on the SSP/SPI bus (deprecated
@@ -614,7 +581,6 @@  config AB8500_GPADC
 
 config AB3550_CORE
         bool "ST-Ericsson AB3550 Mixed Signal Circuit core functions"
-	select MFD_CORE
 	depends on I2C=y && GENERIC_HARDIRQS && ABX500_CORE
 	help
 	  Select this to enable the AB3550 Mixed Signal IC core
@@ -629,7 +595,6 @@  config AB3550_CORE
 config MFD_DB8500_PRCMU
 	bool "ST-Ericsson DB8500 Power Reset Control Management Unit"
 	depends on UX500_SOC_DB8500
-	select MFD_CORE
 	help
 	  Select this option to enable support for the DB8500 Power Reset
 	  and Control Management Unit. This is basically an autonomous
@@ -639,7 +604,6 @@  config MFD_DB8500_PRCMU
 config MFD_DB5500_PRCMU
 	bool "ST-Ericsson DB5500 Power Reset Control Management Unit"
 	depends on UX500_SOC_DB5500
-	select MFD_CORE
 	help
 	  Select this option to enable support for the DB5500 Power Reset
 	  and Control Management Unit. This is basically an autonomous
@@ -648,7 +612,6 @@  config MFD_DB5500_PRCMU
 
 config MFD_CS5535
 	tristate "Support for CS5535 and CS5536 southbridge core functions"
-	select MFD_CORE
 	depends on PCI && X86
 	---help---
 	  This is the core driver for CS5535/CS5536 MFD functions.  This is
@@ -656,7 +619,6 @@  config MFD_CS5535
 
 config MFD_TIMBERDALE
 	tristate "Support for the Timberdale FPGA"
-	select MFD_CORE
 	depends on PCI && GPIOLIB
 	---help---
 	This is the core driver for the timberdale FPGA. This device is a
@@ -668,14 +630,12 @@  config MFD_TIMBERDALE
 config LPC_SCH
 	tristate "Intel SCH LPC"
 	depends on PCI
-	select MFD_CORE
 	help
 	  LPC bridge function of the Intel SCH provides support for
 	  System Management Bus and General Purpose I/O.
 
 config MFD_RDC321X
 	tristate "Support for RDC-R321x southbridge"
-	select MFD_CORE
 	depends on PCI
 	help
 	  Say yes here if you want to have support for the RDC R-321x SoC
@@ -684,7 +644,6 @@  config MFD_RDC321X
 
 config MFD_JANZ_CMODIO
 	tristate "Support for Janz CMOD-IO PCI MODULbus Carrier Board"
-	select MFD_CORE
 	depends on PCI
 	help
 	  This is the core driver for the Janz CMOD-IO PCI MODULbus
@@ -694,7 +653,6 @@  config MFD_JANZ_CMODIO
 
 config MFD_JZ4740_ADC
 	bool "Support for the JZ4740 SoC ADC core"
-	select MFD_CORE
 	select GENERIC_IRQ_CHIP
 	depends on MACH_JZ4740
 	help
@@ -704,7 +662,6 @@  config MFD_JZ4740_ADC
 config MFD_VX855
 	tristate "Support for VIA VX855/VX875 integrated south bridge"
 	depends on PCI
-	select MFD_CORE
 	help
 	  Say yes here to enable support for various functions of the
 	  VIA VX855/VX875 south bridge. You will need to enable the vx855_spi
@@ -713,7 +670,6 @@  config MFD_VX855
 config MFD_WL1273_CORE
 	tristate "Support for TI WL1273 FM radio."
 	depends on I2C
-	select MFD_CORE
 	default n
 	help
 	  This is the core driver for the TI WL1273 FM radio. This MFD
@@ -735,7 +691,6 @@  config MFD_PM8XXX
 config MFD_PM8921_CORE
 	tristate "Qualcomm PM8921 PMIC chip"
 	depends on MSM_SSBI
-	select MFD_CORE
 	select MFD_PM8XXX
 	help
 	  If you say yes to this option, support will be included for the
@@ -762,7 +717,6 @@  config TPS65911_COMPARATOR
 
 config MFD_AAT2870_CORE
 	bool "Support for the AnalogicTech AAT2870"
-	select MFD_CORE
 	depends on I2C=y && GPIOLIB
 	help
 	  If you say yes here you get support for the AAT2870.
@@ -770,7 +724,7 @@  config MFD_AAT2870_CORE
 	  additional drivers must be enabled in order to use the
 	  functionality of the device.
 
-endif # MFD_SUPPORT
+endif # MFD_CORE
 
 menu "Multimedia Capabilities Port drivers"
 	depends on ARCH_SA1100