Update gpiommc to use configfs

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11887 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/mmc_over_gpio/Makefile

@@ -16,7 +16,7 @@ include $(INCLUDE_DIR)/package.mk
 define KernelPackage/mmc-over-gpio
   SUBMENU:=Other modules
   DEPENDS:=@GPIO_SUPPORT +kmod-mmc-spi +kmod-spi-gpio
-  KCONFIG:=CONFIG_GPIOMMC
+  KCONFIG:=CONFIG_GPIOMMC CONFIG_CONFIGFS_FS=y
   TITLE:=MMC/SD card over GPIO support
   FILES:=$(LINUX_DIR)/drivers/mmc/host/gpiommc.$(LINUX_KMOD_SUFFIX)
   AUTOLOAD:=$(call AutoLoad,93,spi_gpio gpiommc)

package/mmc_over_gpio/files/mmc_over_gpio.init

@@ -2,20 +2,59 @@
 # Copyright (C) 2008 OpenWrt.org
 START=90
 
-SYSFS="/sys"
-SYSFS_DRIVERDIR="$SYSFS/bus/platform/drivers/gpiommc"
+CONFIGFS_DIR="/config/gpiommc"
 
 # add_device(name, DI_pin, DO_pin, CLK_pin, CS_pin, mode)
 add_device() {
-	echo -n "$1" "$2" "$3" "$4" "$5" "$6" > $SYSFS_DRIVERDIR/add
+	local dir="$CONFIGFS_DIR/$1"
+
+	mkdir $dir
+	[ $? -eq 0 ] || return 1
+	echo $2 > $dir/gpio_data_in
+	[ $? -eq 0 ] || return 1
+	echo $3 > $dir/gpio_data_out
+	[ $? -eq 0 ] || return 1
+	echo $4 > $dir/gpio_clock
+	[ $? -eq 0 ] || return 1
+	echo $5 > $dir/gpio_chipselect
+	[ $? -eq 0 ] || return 1
+	echo $6 > $dir/spi_mode
+	[ $? -eq 0 ] || return 1
+	# XXX We have more config options available. Use defaults for now.
+
+	echo 1 > $dir/register
+	[ $? -eq 0 ] || return 1
+
+	return 0
 }
 
 # remove_device(name)
 remove_device() {
-	echo -n "$1" > $SYSFS_DRIVERDIR/remove
+	local dir="$CONFIGFS_DIR/$1"
+
+	rmdir $dir
+}
+
+mount_configfs() {
+	# FIXME: This should probably be done somewhere else.
+	mount | grep configfs
+	if [ $? -eq 0 ]; then
+		# already mounted
+		return 0
+	fi
+	mkdir -p /config
+	[ $? -eq 0 ] || return 1
+	mount configfs -t configfs /config
+	[ $? -eq 0 ] || return 1
+
+	return 0
 }
 
 start() {
+	# Make sure configfs is mounted
+	mount_configfs
+	[ $? -eq 0 ] || return 1
+
 	#FIXME we should use a config file, but I dunno how that parser works.
 	add_device "default" 5 4 3 7 0
 }