Build in multi card reader in acer aspire one is from ENE Technology.
Here is an instruction to compile the kernel module driver

Download the driver

unzip to /usr/src/keucr-0.0.1
create /usr/src/keucr-0.0.1/dkms.conf file

PACKAGE_NAME="keucr"
PACKAGE_VERSION="0.0.1"
CLEAN="rm -f *.*o"
BUILT_MODULE_NAME[0]="keucr"
MAKE[0]="make -C $kernel_source_dir M=$dkms_tree/$PACKAGE_NAME/$PACKAGE_VERSION/build"
DEST_MODULE_LOCATION[0]="/extra"
AUTOINSTALL="yes"


#dkms add -m keucr -v 0.0.1
#dkms build -m keucr -v 0.0.1
#dkms install -m keucr -v 0.0.1
#cat keucr >> /etc/modules


more info