drivers/loop: Move drivers/loop.c to drivers/loop/losetup.c

drivers/Kconfig

@@ -27,13 +27,7 @@ config DEV_RANDOM
 	default n
 	depends on ARCH_HAVE_RNG
 
-config LOOP
-	bool "Enable loop device"
-	default n
-	---help---
-		Supports the standard loop device that can be used to export a
-		file (or character device) as a block device.  See losetup() and
-		loteardown() in include/nuttx/fs/fs.h.
+source drivers/loop/Kconfig
 
 menu "Buffering"
 

drivers/Makefile

@@ -55,6 +55,7 @@ include bch$(DELIM)Make.defs
 include input$(DELIM)Make.defs
 include discrete$(DELIM)Make.defs
 include lcd$(DELIM)Make.defs
+include loop$(DELIM)Make.defs
 include mmcsd$(DELIM)Make.defs
 include mtd$(DELIM)Make.defs
 include eeprom$(DELIM)Make.defs
@@ -76,7 +77,7 @@ ifneq ($(CONFIG_NFILE_DESCRIPTORS),0)
   CSRCS += dev_null.c dev_zero.c
 
 ifneq ($(CONFIG_DISABLE_MOUNTPOINT),y)
-  CSRCS += ramdisk.c loop.c
+  CSRCS += ramdisk.c
 ifeq ($(CONFIG_DRVR_WRITEBUFFER),y)
   CSRCS += rwbuffer.c
 else

drivers/README.txt

@@ -21,11 +21,6 @@ dev_null.c and dev_zero.c
   want to register these devices (devnull_register() and
   devzero_register()).
 
-loop.c
-  Supports the standard loop device that can be used to export a
-  file (or character device) as a block device.  See losetup() and
-  loteardown() in include/nuttx/fs/fs.h.
-
 pwm.c
   Provides the "upper half" of a pulse width modulation (PWM) driver.
   The "lower half" of the PWM driver is provided by device-specific
@@ -36,18 +31,10 @@ ramdisk.c
   a block driver that can be mounted as a files system.  See
   include/nuttx/fs/ramdisk.h.
 
-timer.c
-  Provides the "upper half" for a generic timer driver.  See
-  include/nuttx/timers/timer.h for more information.
-
 rwbuffer.c
   A facility that can be use by any block driver in-order to add
   writing buffering and read-ahead buffering.
 
-watchdog.c
-  Provides the "upper half" for a generic watchdog driver.  See
-  include/nuttx/timers/watchdog.h for more information.
-
 Subdirectories of this directory:
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
@@ -94,6 +81,11 @@ lcd/
   Drivers for parallel and serial LCD and OLED type devices.  These
   drivers support interfaces as defined in include/nuttx/lcd/lcd.h
 
+loop/
+  Supports the standard loop device that can be used to export a
+  file (or character device) as a block device.  See losetup() and
+  loteardown() in include/nuttx/fs/fs.h.
+
 mmcsd/
   Support for MMC/SD block drivers.  MMC/SD block drivers based on
   SPI and SDIO/MCI interfaces are supported.  See include/nuttx/mmcsd.h
@@ -153,6 +145,17 @@ spi/
 syslog/
   System logging devices. See include/syslog.h and include/nuttx/syslog/syslog.h
 
+timers/
+  Includes support for various timer devices including:
+
+  - An "upper half" for a generic timer driver.  See
+    include/nuttx/timers/timer.h for more information.
+
+  - An "upper half" for a generic watchdog driver.  See
+    include/nuttx/timers/watchdog.h for more information.
+
+  - RTC drivers
+
 usbdev/
   USB device drivers.  See also include/nuttx/usb/usbdev.h
 

drivers/loop/Kconfig

+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
+
+config LOOP
+	bool "Enable loop device"
+	default n
+	---help---
+		Supports the standard loop device that can be used to export a
+		file (or character device) as a block device.

drivers/loop/Make.defs

+############################################################################
+# drivers/loop/Make.defs
+#
+#   Copyright (C) 2015 Gregory Nutt. All rights reserved.
+#   Author: Gregory Nutt <gnutt@nuttx.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+# 3. Neither the name NuttX nor the names of its contributors may be
+#    used to endorse or promote products derived from this software
+#    without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+############################################################################
+
+# Loop device can only be used with mountpoint support
+
+ifneq ($(CONFIG_DISABLE_MOUNTPOINT),y)
+
+# Include loop device support
+
+ifneq ($(CONFIG_LOOP),y)
+# CSRCS += loop.c
+endif
+
+CSRCS += losetup.c
+
+# Add loop devicer build support
+
+DEPPATH += --dep-path loop
+VPATH += :loop
+CFLAGS += ${shell $(INCDIR) $(INCDIROPT) "$(CC)" $(TOPDIR)$(DELIM)drivers$(DELIM)loop}
+
+endif

drivers/loop.c → drivers/loop/losetup.c

 /****************************************************************************
- * drivers/loop.c
+ * drivers/losetup.c
  *
- *   Copyright (C) 2008-2009, 2011, 2014 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2008-2009, 2011, 2014-2015 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without