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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144// SPDX-License-Identifier: GPL-2.0#include <linux/proc_fs.h>#include <linux/seq_file.h>#include <linux/string_choices.h>#include <linux/suspend.h>#include <linux/bcd.h>#include <linux/acpi.h>#include <linux/uaccess.h>
#include "sleep.h"#include "internal.h"
/* * this file provides support for: * /proc/acpi/wakeup */
static intacpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset){ struct acpi_device *dev, *tmp;
seq_printf(seq, "Device\tS-state\t Status Sysfs node\n");
mutex_lock(&acpi_device_lock); list_for_each_entry_safe(dev, tmp, &acpi_wakeup_device_list, wakeup_list) { struct acpi_device_physical_node *entry;
if (!dev->wakeup.flags.valid) continue;
seq_printf(seq, "%s\t S%llu\t", dev->pnp.bus_id, dev->wakeup.sleep_state);
mutex_lock(&dev->physical_node_lock);
if (!dev->physical_node_count) { seq_printf(seq, "%c%-8s\n", dev->wakeup.flags.valid ? '*' : ' ', str_enabled_disabled(device_may_wakeup(&dev->dev))); } 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.valid ? '*' : ' ', str_enabled_disabled(device_may_wakeup(ldev) || device_may_wakeup(&dev->dev)), 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_tacpi_system_write_wakeup_device(struct file *file, const char __user * buffer, size_t count, loff_t * ppos){ struct acpi_device *dev, *tmp; 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_entry_safe(dev, tmp, &acpi_wakeup_device_list, 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 intacpi_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 proc_ops acpi_system_wakeup_device_proc_ops = { .proc_open = acpi_system_wakeup_device_open_fs, .proc_read = seq_read, .proc_write = acpi_system_write_wakeup_device, .proc_lseek = seq_lseek, .proc_release = single_release,};
void __init acpi_sleep_proc_init(void){ /* 'wakeup device' [R/W] */ proc_create("wakeup", 0644, acpi_root_dir, &acpi_system_wakeup_device_proc_ops);}