Subject: [PATCH] [acpi driver model] Add interface for registering proc directories

- Create drivers/acpi/drivers/core/proc.c and implement
  acpi_driver_proc_{add,remove} that are to be called
  when a driver is registered and unregistered.

Signed-off-by: Patrick Mochel <mochel@linux.intel.com>

---

 drivers/acpi/drivers/core/Makefile |    1 +
 drivers/acpi/drivers/core/proc.c   |   54 ++++++++++++++++++++++++++++++++++++
 drivers/acpi/drivers/core/proc.h   |   26 +++++++++++++++++
 3 files changed, 81 insertions(+), 0 deletions(-)
 create mode 100644 drivers/acpi/drivers/core/proc.c
 create mode 100644 drivers/acpi/drivers/core/proc.h

applies-to: 093741e077bbf6377c23f2098a0c0b8ce7877ed5
ee20481e40253422d456a07b41b3b419b3a3250d
diff --git a/drivers/acpi/drivers/core/Makefile b/drivers/acpi/drivers/core/Makefile
index b9c847a..caed047 100644
--- a/drivers/acpi/drivers/core/Makefile
+++ b/drivers/acpi/drivers/core/Makefile
@@ -3,6 +3,7 @@ obj-y	:=	bus.o device.o driver.o event.o
 obj-y	+=	lib.o
 
 obj-$(CONFIG_ACPI_DM_SYSFS)	+=	sysfs.o
+obj-$(CONFIG_ACPI_DM_SYSFS)	+=	proc.o
 
 
 ifeq ($(CONFIG_ACPI_DM_DEBUG),y)
diff --git a/drivers/acpi/drivers/core/proc.c b/drivers/acpi/drivers/core/proc.c
new file mode 100644
index 0000000..ad6c09a
--- /dev/null
+++ b/drivers/acpi/drivers/core/proc.c
@@ -0,0 +1,54 @@
+/**
+ *	drivers/acpi/drivers/core/proc.c - ACPI proc file management
+ *
+ *	Copyright (C) 2006 Patrick Mochel
+ *
+ */
+
+#include "core.h"
+
+
+/**
+ *	acpi_driver_proc_add - Create a driver's proc directory.
+ *	@d:	The ACPI driver.
+ *
+ *	This creates a directory in /proc/acpi/ with the name
+ *	in the acpi_driver_proc structure (usually the name of
+ *	the driver).
+ *
+ *	It uses that directory to set ->d_parent in the 
+ *	acpi_driver_proc structure, for use by the functions to
+ *	add/remove device directories.
+ */
+
+int acpi_driver_proc_add(struct acpi_device_driver * d)
+{
+	struct acpi_driver_proc * adp = d->d_proc;
+	struct proc_dir_entry * dir;
+	int ret = 0;
+
+	dir = proc_mkdir(adp->p_name, acpi_root_dir);
+	if (dir)
+		adp->p_parent = dir;
+	else
+		return -ENODEV;
+	return ret;
+}
+
+
+/**
+ *	acpi_driver_proc_remove - Remove a driver's proc directory.
+ *	@d:	The ACPI driver.
+ *
+ *	Remove the driver's directory from /proc/acpi/ and 
+ *	set p_parent == NULL in the driver's acpi_driver_proc 
+ *	structure.
+ */
+
+void acpi_driver_proc_remove(struct acpi_device_driver * d)
+{
+	struct acpi_driver_proc * adp = d->d_proc;
+
+	adp->p_parent = NULL;
+	remove_proc_entry(adp->p_name, acpi_root_dir);
+}
diff --git a/drivers/acpi/drivers/core/proc.h b/drivers/acpi/drivers/core/proc.h
new file mode 100644
index 0000000..53c1e25
--- /dev/null
+++ b/drivers/acpi/drivers/core/proc.h
@@ -0,0 +1,26 @@
+/**
+ *	drivers/acpi/drivers/core/proc.h
+ *
+ *	proc filesystem directory and file management for 
+ *	ACPI drivers and devices.
+ */
+
+#ifdef CONFIG_ACPI_DM_PROC
+
+extern int acpi_driver_proc_add(struct acpi_device_driver *);
+extern void acpi_driver_proc_remove(struct acpi_device_driver *);
+
+#else	/* CONFIG_ACPI_DM_PROC */
+
+static inline int acpi_driver_proc_add(struct acpi_device_driver * drv)
+{
+	return 0;
+}
+
+static inline void acpi_driver_proc_remove(struct acpi_device_driver * drv)
+{
+
+}
+
+
+#endif	/* CONFIG_ACPI_DM_PROC */
---
0.99.9.GIT