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.

1 files changed, 10 insertions, 1 deletions

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 9da0e504bbe9..29781ca1eb6f 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -7,7 +7,16 @@ menuconfig MFD_SUPPORT
         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