mfd: More verbose MFD Kconfig entry
For people to be able to intellingibly decide if they want to enable MFD
drivers or not, we have to give them a much better description of what they
are.
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 9da0e50..29781ca 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -7,7 +7,16 @@
depends on HAS_IOMEM
default y
help
- Configure MFD device drivers.
+ Multifunction devices embed several functions (e.g. GPIOs,
+ touchscreens, keyboards, current regulators, power management chips,
+ etc...) in one single integrated circuit. They usually talk to the
+ main CPU through one or more IRQ lines and low speed data busses (SPI,
+ I2C, etc..). They appear as one single device to the main system
+ through the data bus and the MFD framework allows for sub devices
+ (a.k.a. functions) to appear as discrete platform devices.
+ MFDs are typically found on embedded platforms.
+
+ This option alone does not add any kernel code.
if MFD_SUPPORT