ACPI video: make procfs I/F depend on CONFIG_ACPI_PROCFS

Mark ACPI video driver procfs I/F deprecated, including:
/proc/acpi/video/*/info
/proc/acpi/video/*/DOS
/proc/acpi/video/*/ROM
/proc/acpi/video/*/POST
/proc/acpi/video/*/POST_info
/proc/acpi/video/*/*/info
/proc/acpi/video/*/*/state
/proc/acpi/video/*/*/EDID
and
/proc/acpi/video/*/*/brightness, because
1. we already have the sysfs I/F /sysclass/backlight/ as the replacement
of /proc/acpi/video/*/*/brightness.
2. the other procfs I/F is not useful for userspace.

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

2 files changed, 82 insertions, 50 deletions

diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 6f66a937ba20..354e613f3ca4 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -56,6 +56,7 @@ config ACPI_PROCFS
 
           /proc/acpi/processor/*/throttling (/sys/class/thermal/
                 cooling_device*/*)
+          /proc/acpi/video/*/brightness (/sys/class/backlight/)
           This option has no effect on /proc/acpi/ files
           and functions which do not yet exist in /sys.
 
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 9865d46f49a8..909ae7bf3b93 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -152,7 +152,9 @@ struct acpi_video_bus {
         struct acpi_video_bus_flags flags;
         struct list_head video_device_list;
         struct mutex device_list_lock;  /* protects video_device_list */
+#ifdef CONFIG_ACPI_PROCFS
         struct proc_dir_entry *dir;
+#endif
         struct input_dev *input;
         char phys[32];  /* for input device */
         struct notifier_block pm_nb;
@@ -208,6 +210,7 @@ struct acpi_video_device {
         struct output_device *output_dev;
 };
 
+#ifdef CONFIG_ACPI_PROCFS
 /* bus */
 static int acpi_video_bus_info_open_fs(struct inode *inode, struct file *file);
 static const struct file_operations acpi_video_bus_info_fops = {
@@ -307,6 +310,7 @@ static const struct file_operations acpi_video_device_EDID_fops = {
         .llseek = seq_lseek,
         .release = single_release,
 };
+#endif /* CONFIG_ACPI_PROCFS */
 
 static const char device_decode[][30] = {
         "motherboard VGA device",
@@ -450,16 +454,6 @@ static struct thermal_cooling_device_ops video_cooling_ops = {
 /* device */
 
 static int
-acpi_video_device_query(struct acpi_video_device *device, unsigned long long *state)
-{
-        int status;
-
-        status = acpi_evaluate_integer(device->dev->handle, "_DGS", NULL, state);
-
-        return status;
-}
-
-static int
 acpi_video_device_get_state(struct acpi_video_device *device,
                             unsigned long long *state)
 {
@@ -698,46 +692,6 @@ acpi_video_device_EDID(struct acpi_video_device *device,
 
 /* bus */
 
-static int
-acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
-{
-        int status;
-        unsigned long long tmp;
-        union acpi_object arg0 = { ACPI_TYPE_INTEGER };
-        struct acpi_object_list args = { 1, &arg0 };
-
-
-        arg0.integer.value = option;
-
-        status = acpi_evaluate_integer(video->device->handle, "_SPD", &args, &tmp);
-        if (ACPI_SUCCESS(status))
-                status = tmp ? (-EINVAL) : (AE_OK);
-
-        return status;
-}
-
-static int
-acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long long *id)
-{
-        int status;
-
-        status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
-
-        return status;
-}
-
-static int
-acpi_video_bus_POST_options(struct acpi_video_bus *video,
-                            unsigned long long *options)
-{
-        int status;
-
-        status = acpi_evaluate_integer(video->device->handle, "_VPO", NULL, options);
-        *options &= 3;
-
-        return status;
-}
-
 /*
  *  Arg:
  *      video           : video bus device pointer
@@ -1159,6 +1113,7 @@ static int acpi_video_bus_check(struct acpi_video_bus *video)
 /* --------------------------------------------------------------------------
                               FS Interface (/proc)
    -------------------------------------------------------------------------- */
+#ifdef CONFIG_ACPI_PROCFS
 
 static struct proc_dir_entry *acpi_video_dir;
 
@@ -1198,6 +1153,18 @@ acpi_video_device_info_open_fs(struct inode *inode, struct file *file)
                            PDE(inode)->data);
 }
 
+static int
+acpi_video_device_query(struct acpi_video_device *device,
+                        unsigned long long *state)
+{
+        int status;
+
+        status = acpi_evaluate_integer(device->dev->handle, "_DGS",
+                                       NULL, state);
+
+        return status;
+}
+
 static int acpi_video_device_state_seq_show(struct seq_file *seq, void *offset)
 {
         int status;
@@ -1492,6 +1459,19 @@ static int acpi_video_bus_ROM_open_fs(struct inode *inode, struct file *file)
         return single_open(file, acpi_video_bus_ROM_seq_show, PDE(inode)->data);
 }
 
+static int
+acpi_video_bus_POST_options(struct acpi_video_bus *video,
+                            unsigned long long *options)
+{
+        int status;
+
+        status = acpi_evaluate_integer(video->device->handle, "_VPO",
+                                       NULL, options);
+        *options &= 3;
+
+        return status;
+}
+
 static int acpi_video_bus_POST_info_seq_show(struct seq_file *seq, void *offset)
 {
         struct acpi_video_bus *video = seq->private;
@@ -1530,6 +1510,16 @@ acpi_video_bus_POST_info_open_fs(struct inode *inode, struct file *file)
                            PDE(inode)->data);
 }
 
+static int
+acpi_video_bus_get_POST(struct acpi_video_bus *video, unsigned long long *id)
+{
+        int status;
+
+        status = acpi_evaluate_integer(video->device->handle, "_GPD", NULL, id);
+
+        return status;
+}
+
 static int acpi_video_bus_POST_seq_show(struct seq_file *seq, void *offset)
 {
         struct acpi_video_bus *video = seq->private;
@@ -1572,6 +1562,25 @@ static int acpi_video_bus_DOS_open_fs(struct inode *inode, struct file *file)
         return single_open(file, acpi_video_bus_DOS_seq_show, PDE(inode)->data);
 }
 
+static int
+acpi_video_bus_set_POST(struct acpi_video_bus *video, unsigned long option)
+{
+        int status;
+        unsigned long long tmp;
+        union acpi_object arg0 = { ACPI_TYPE_INTEGER };
+        struct acpi_object_list args = { 1, &arg0 };
+
+
+        arg0.integer.value = option;
+
+        status = acpi_evaluate_integer(video->device->handle, "_SPD",
+                                       &args, &tmp);
+        if (ACPI_SUCCESS(status))
+                status = tmp ? (-EINVAL) : (AE_OK);
+
+        return status;
+}
+
 static ssize_t
 acpi_video_bus_write_POST(struct file *file,
                           const char __user * buffer,
@@ -1722,6 +1731,24 @@ static int acpi_video_bus_remove_fs(struct acpi_device *device)
 
         return 0;
 }
+#else
+static inline int acpi_video_device_add_fs(struct acpi_device *device)
+{
+        return 0;
+}
+static inline int acpi_video_device_remove_fs(struct acpi_device *device)
+{
+        return 0;
+}
+static inline int acpi_video_bus_add_fs(struct acpi_device *device)
+{
+        return 0;
+}
+static inline int acpi_video_bus_remove_fs(struct acpi_device *device)
+{
+        return 0;
+}
+#endif /* CONFIG_ACPI_PROCFS */
 
 /* --------------------------------------------------------------------------
                                  Driver Interface
@@ -2557,9 +2584,11 @@ int acpi_video_register(void)
                 return 0;
         }
 
+#ifdef CONFIG_ACPI_PROCFS
         acpi_video_dir = proc_mkdir(ACPI_VIDEO_CLASS, acpi_root_dir);
         if (!acpi_video_dir)
                 return -ENODEV;
+#endif
 
         result = acpi_bus_register_driver(&acpi_video_bus);
         if (result < 0) {
@@ -2588,7 +2617,9 @@ void acpi_video_unregister(void)
         }
         acpi_bus_unregister_driver(&acpi_video_bus);
 
+#ifdef CONFIG_ACPI_PROCFS
         remove_proc_entry(ACPI_VIDEO_CLASS, acpi_root_dir);
+#endif
 
         register_count = 0;