Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / acpi / proc.c

diff --git a/kernel/drivers/acpi/proc.c b/kernel/drivers/acpi/proc.c
new file mode 100644 (file)
index 0000000..75c28ea
--- /dev/null
+++ b/kernel/drivers/acpi/proc.c
@@ -0,0 +1,154 @@
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/export.h>
+#include <linux/suspend.h>
+#include <linux/bcd.h>
+#include <linux/acpi.h>
+#include <asm/uaccess.h>
+
+#include "sleep.h"
+#include "internal.h"
+
+#define _COMPONENT             ACPI_SYSTEM_COMPONENT
+
+/*
+ * this file provides support for:
+ * /proc/acpi/wakeup
+ */
+
+ACPI_MODULE_NAME("sleep")
+
+static int
+acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset)
+{
+       struct list_head *node, *next;
+
+       seq_printf(seq, "Device\tS-state\t  Status   Sysfs node\n");
+
+       mutex_lock(&acpi_device_lock);
+       list_for_each_safe(node, next, &acpi_wakeup_device_list) {
+               struct acpi_device *dev =
+                   container_of(node, struct acpi_device, wakeup_list);
+               struct acpi_device_physical_node *entry;
+
+               if (!dev->wakeup.flags.valid)
+                       continue;
+
+               seq_printf(seq, "%s\t  S%d\t",
+                          dev->pnp.bus_id,
+                          (u32) dev->wakeup.sleep_state);
+
+               mutex_lock(&dev->physical_node_lock);
+
+               if (!dev->physical_node_count) {
+                       seq_printf(seq, "%c%-8s\n",
+                               dev->wakeup.flags.run_wake ? '*' : ' ',
+                               device_may_wakeup(&dev->dev) ?
+                                       "enabled" : "disabled");
+               } else {
+                       struct device *ldev;
+                       list_for_each_entry(entry, &dev->physical_node_list,
+                                       node) {
+                               ldev = get_device(entry->dev);
+                               if (!ldev)
+                                       continue;
+
+                               if (&entry->node !=
+                                               dev->physical_node_list.next)
+                                       seq_printf(seq, "\t\t");
+
+                               seq_printf(seq, "%c%-8s  %s:%s\n",
+                                       dev->wakeup.flags.run_wake ? '*' : ' ',
+                                       (device_may_wakeup(&dev->dev) ||
+                                       device_may_wakeup(ldev)) ?
+                                       "enabled" : "disabled",
+                                       ldev->bus ? ldev->bus->name :
+                                       "no-bus", dev_name(ldev));
+                               put_device(ldev);
+                       }
+               }
+
+               mutex_unlock(&dev->physical_node_lock);
+       }
+       mutex_unlock(&acpi_device_lock);
+       return 0;
+}
+
+static void physical_device_enable_wakeup(struct acpi_device *adev)
+{
+       struct acpi_device_physical_node *entry;
+
+       mutex_lock(&adev->physical_node_lock);
+
+       list_for_each_entry(entry,
+               &adev->physical_node_list, node)
+               if (entry->dev && device_can_wakeup(entry->dev)) {
+                       bool enable = !device_may_wakeup(entry->dev);
+                       device_set_wakeup_enable(entry->dev, enable);
+               }
+
+       mutex_unlock(&adev->physical_node_lock);
+}
+
+static ssize_t
+acpi_system_write_wakeup_device(struct file *file,
+                               const char __user * buffer,
+                               size_t count, loff_t * ppos)
+{
+       struct list_head *node, *next;
+       char strbuf[5];
+       char str[5] = "";
+
+       if (count > 4)
+               count = 4;
+
+       if (copy_from_user(strbuf, buffer, count))
+               return -EFAULT;
+       strbuf[count] = '\0';
+       sscanf(strbuf, "%s", str);
+
+       mutex_lock(&acpi_device_lock);
+       list_for_each_safe(node, next, &acpi_wakeup_device_list) {
+               struct acpi_device *dev =
+                   container_of(node, struct acpi_device, wakeup_list);
+               if (!dev->wakeup.flags.valid)
+                       continue;
+
+               if (!strncmp(dev->pnp.bus_id, str, 4)) {
+                       if (device_can_wakeup(&dev->dev)) {
+                               bool enable = !device_may_wakeup(&dev->dev);
+                               device_set_wakeup_enable(&dev->dev, enable);
+                       } else {
+                               physical_device_enable_wakeup(dev);
+                       }
+                       break;
+               }
+       }
+       mutex_unlock(&acpi_device_lock);
+       return count;
+}
+
+static int
+acpi_system_wakeup_device_open_fs(struct inode *inode, struct file *file)
+{
+       return single_open(file, acpi_system_wakeup_device_seq_show,
+                          PDE_DATA(inode));
+}
+
+static const struct file_operations acpi_system_wakeup_device_fops = {
+       .owner = THIS_MODULE,
+       .open = acpi_system_wakeup_device_open_fs,
+       .read = seq_read,
+       .write = acpi_system_write_wakeup_device,
+       .llseek = seq_lseek,
+       .release = single_release,
+};
+
+int __init acpi_sleep_proc_init(void)
+{
+       /* 'wakeup device' [R/W] */
+       proc_create("wakeup", S_IFREG | S_IRUGO | S_IWUSR,
+                   acpi_root_dir, &acpi_system_wakeup_device_fops);
+
+       return 0;
+}