From f2b56bc808addb908a5bf435d9b942c02af9a7c4 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Thu, 6 Jan 2011 23:34:22 +0100 Subject: [PATCH] ACPI / PM: Use device wakeup flags for handling ACPI wakeup devices There are ACPI devices (buttons and the laptop lid) that can wake up the system from sleep states and have no "physical" companion devices. The ACPI subsystem uses two flags, wakeup.state.enabled and wakeup.flags.always_enabled, for handling those devices, but they are not accessible through the standard device wakeup infrastructure. User space can only control them via the /proc/acpi/wakeup interface that is not really convenient (e.g. the way in which devices are enabled to wake up the system is not portable between different systems, because it requires one to know the devices' "names" used in the system's ACPI tables). To address this problem, use standard device wakeup flags instead of the special ACPI flags for handling those devices. In particular, use device_set_wakeup_capable() to mark the ACPI wakeup devices during initialization and use device_set_wakeup_enable() to allow or disallow them to wake up the system from sleep states. Rework the /proc/acpi/wakeup interface to take these changes into account. Signed-off-by: Rafael J. Wysocki Signed-off-by: Len Brown --- drivers/acpi/button.c | 4 ++-- drivers/acpi/proc.c | 19 +++++++++++++------ drivers/acpi/scan.c | 2 +- drivers/acpi/wakeup.c | 18 ++++++++++-------- 4 files changed, 26 insertions(+), 17 deletions(-) diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c index 71ef9cd0735f..234c104fcdd8 100644 --- a/drivers/acpi/button.c +++ b/drivers/acpi/button.c @@ -426,7 +426,7 @@ static int acpi_button_add(struct acpi_device *device) acpi_enable_gpe(device->wakeup.gpe_device, device->wakeup.gpe_number); device->wakeup.run_wake_count++; - device->wakeup.state.enabled = 1; + device_set_wakeup_enable(&device->dev, true); } printk(KERN_INFO PREFIX "%s [%s]\n", name, acpi_device_bid(device)); @@ -449,7 +449,7 @@ static int acpi_button_remove(struct acpi_device *device, int type) acpi_disable_gpe(device->wakeup.gpe_device, device->wakeup.gpe_number); device->wakeup.run_wake_count--; - device->wakeup.state.enabled = 0; + device_set_wakeup_enable(&device->dev, false); } acpi_button_remove_fs(device); diff --git a/drivers/acpi/proc.c b/drivers/acpi/proc.c index 129effbb7bd4..f5f986991b52 100644 --- a/drivers/acpi/proc.c +++ b/drivers/acpi/proc.c @@ -311,7 +311,9 @@ acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset) dev->pnp.bus_id, (u32) dev->wakeup.sleep_state, dev->wakeup.flags.run_wake ? '*' : ' ', - dev->wakeup.state.enabled ? "enabled" : "disabled"); + (device_may_wakeup(&dev->dev) + || (ldev && device_may_wakeup(ldev))) ? + "enabled" : "disabled"); if (ldev) seq_printf(seq, "%s:%s", ldev->bus ? ldev->bus->name : "no-bus", @@ -328,8 +330,10 @@ static void physical_device_enable_wakeup(struct acpi_device *adev) { struct device *dev = acpi_get_physical_device(adev->handle); - if (dev && device_can_wakeup(dev)) - device_set_wakeup_enable(dev, adev->wakeup.state.enabled); + if (dev && device_can_wakeup(dev)) { + bool enable = !device_may_wakeup(dev); + device_set_wakeup_enable(dev, enable); + } } static ssize_t @@ -360,9 +364,12 @@ acpi_system_write_wakeup_device(struct file *file, continue; if (!strncmp(dev->pnp.bus_id, str, 4)) { - dev->wakeup.state.enabled = - dev->wakeup.state.enabled ? 0 : 1; - physical_device_enable_wakeup(dev); + 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; } } diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 29ef505c487b..bf7acbff1f5f 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -803,7 +803,7 @@ static void acpi_bus_set_run_wake_flags(struct acpi_device *device) /* Power button, Lid switch always enable wakeup */ if (!acpi_match_device_ids(device, button_device_ids)) { device->wakeup.flags.run_wake = 1; - device->wakeup.flags.always_enabled = 1; + device_set_wakeup_capable(&device->dev, true); return; } diff --git a/drivers/acpi/wakeup.c b/drivers/acpi/wakeup.c index f62a50c3ed34..f252d0de9922 100644 --- a/drivers/acpi/wakeup.c +++ b/drivers/acpi/wakeup.c @@ -37,11 +37,12 @@ void acpi_enable_wakeup_devices(u8 sleep_state) container_of(node, struct acpi_device, wakeup_list); if (!dev->wakeup.flags.valid - || !(dev->wakeup.state.enabled || dev->wakeup.prepare_count) - || sleep_state > (u32) dev->wakeup.sleep_state) + || sleep_state > (u32) dev->wakeup.sleep_state + || !(device_may_wakeup(&dev->dev) + || dev->wakeup.prepare_count)) continue; - if (dev->wakeup.state.enabled) + if (device_may_wakeup(&dev->dev)) acpi_enable_wakeup_device_power(dev, sleep_state); /* The wake-up power should have been enabled already. */ @@ -63,14 +64,15 @@ void acpi_disable_wakeup_devices(u8 sleep_state) container_of(node, struct acpi_device, wakeup_list); if (!dev->wakeup.flags.valid - || !(dev->wakeup.state.enabled || dev->wakeup.prepare_count) - || (sleep_state > (u32) dev->wakeup.sleep_state)) + || sleep_state > (u32) dev->wakeup.sleep_state + || !(device_may_wakeup(&dev->dev) + || dev->wakeup.prepare_count)) continue; acpi_gpe_wakeup(dev->wakeup.gpe_device, dev->wakeup.gpe_number, ACPI_GPE_DISABLE); - if (dev->wakeup.state.enabled) + if (device_may_wakeup(&dev->dev)) acpi_disable_wakeup_device_power(dev); } } @@ -84,8 +86,8 @@ int __init acpi_wakeup_device_init(void) struct acpi_device *dev = container_of(node, struct acpi_device, wakeup_list); - if (dev->wakeup.flags.always_enabled) - dev->wakeup.state.enabled = 1; + if (device_can_wakeup(&dev->dev)) + device_set_wakeup_enable(&dev->dev, true); } mutex_unlock(&acpi_device_lock); return 0;