ACPI: add a Kconfig option for ACPI procfs interface

Add a kconfig option CONFIG_ACPI_PROCFS to make procfs interface
a configurable attribute of ACPI.

No procfs interface is actually deprecated,
and no sysfs interface is added in this patch.

CONGI_ACPI_PROCFS is used to mark procfs interface as deprecated
once the same function is duplicated in sysfs.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

2 files changed, 19 insertions, 0 deletions

diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index 30f3c8c9c12a..9bc37529f4cd 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -256,3 +256,12 @@ Why:	Speedstep-centrino driver with ACPI hooks and acpi-cpufreq driver are
 Who:    Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
 
 ---------------------------
+
+What:   ACPI procfs interface
+When:   July 2007
+Why:    After ACPI sysfs conversion, ACPI attributes will be duplicated
+        in sysfs and the ACPI procfs interface should be removed.
+Who:    Zhang Rui <rui.zhang@intel.com>
+
+---------------------------
+
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 0f9d4be7ed75..1f82ceba4646 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -77,6 +77,16 @@ config ACPI_SLEEP_PROC_SLEEP
           Create /proc/acpi/sleep
           Deprecated by /sys/power/state
 
+config ACPI_PROCFS
+        bool "Procfs interface (deprecated)"
+        depends on ACPI
+        default y
+        ---help---
+          Procfs interface for ACPI is made optional for back-compatible.
+          As the same functions are duplicated in sysfs interface
+          and this proc interface will be removed some time later,
+          it's marked as deprecated.
+
 config ACPI_AC
         tristate "AC Adapter"
         depends on X86