Hi!
> From: Zhang Rui <rui.zhang at intel.com>
>
> Add "sleep_state" and "wakeup" attributes for devices that can wakeup a sleep system.
> They are located under sysfs device tree, i.e. /sys/device/acpi_system/.../xxx/.
> "sleep_state" indicates the lowest power system sleeping state that can be entered while still providing wake functionality.
> #echo 1 or 0 >/sys/devices/acpi_system/.../xxx/wakeup can be used to enable/disable the device's ability to wake a sleeping system.
>
> Signed-off-by: Zhang Rui <rui.zhang at intel.com>
> ---
> drivers/acpi/scan.c | 12 +++++
> drivers/acpi/sleep/proc.c | 90 ++++++++++++++++++++++++++++++++++++++++++--
> include/acpi/acpi_drivers.h | 6 ++
> 3 files changed, 105 insertions(+), 3 deletions(-)
>
> Index: linux-2.6.20-rc2-mm1/drivers/acpi/sleep/proc.c
> ===================================================================
> --- linux-2.6.20-rc2-mm1.orig/drivers/acpi/sleep/proc.c 2007-01-06 18:17:53.000000000 +0800
> +++ linux-2.6.20-rc2-mm1/drivers/acpi/sleep/proc.c 2007-01-06 18:18:01.000000000 +0800
> @@ -296,6 +296,93 @@ static int alarm_add_sysfs(void)
> return sysfs_create_file(&power_subsys.kset.kobj, &alarm_attr.attr);
> }
>
> +/*
> + * "sleep_state" and "wakeup" attributes are created when device is registered
> + */
> +extern struct list_head acpi_wakeup_device_list;
> +extern spinlock_t acpi_device_lock;
> +
> +static ssize_t
> +acpi_sleep_state_show(struct device *dev, struct device_attribute *attr, char* buf){
> + struct acpi_device *acpi_dev = to_acpi_device(dev);
CodingStyle.
> + return sprintf(buf, "%2d\n", (u32) acpi_dev->wakeup.sleep_state);
This exports ACPI Sx states as integers; but those make no sense on
non-acpi systems. Exporting /sys/power/state -like things might be
berrer?
Pavel
--
Thanks for all the (sleeping) penguins.
