The realtek driver use the MFD core API and thus must select MFD_CORE. Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
@@ -66,6 +66,7 @@ config MFD_SM501_GPIO
config MFD_RTSX_PCI
tristate "Support for Realtek PCI-E card reader"
depends on PCI
+ select MFD_CORE
help
This supports for Realtek PCI-Express card reader including rts5209,
rts5229, rtl8411, etc. Realtek card reader supports access to many
Samuel Ortiz