summaryrefslogtreecommitdiff
path: root/drivers/acpi/acpi_tad.c
AgeCommit message (Collapse)Author
2018-10-18ACPI: TAD: Add low-level support for real time capabilityRafael J. Wysocki
Add low-level support for the (optional) real time capability of the ACPI Time and Alarm Device (TAD) to the ACPI TAD driver. This allows the real time to be acquired or set via sysfs with the help of the _GRT and _SRT methods of the TAD, respectively. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2018-03-20ACPI: Add Time and Alarm Device (TAD) driverRafael J. Wysocki
Introduce a driver for the ACPI Time and Alarm Device (TAD) based on Section 9.18 of ACPI 6.2. This driver only supports the system wakeup capabilities of the TAD which are mandatory. Support for the RTC capabilities of the TAD will be added to it in the future. This driver is entirely sysfs-based. It provides attributes (under the TAD platform device) to allow user space to manage the AC and DC wakeup timers of the TAD: set and read their values, set and check their expire timer wake policies, check and clear their status and check the capabilities of the TAD reported by AML. The DC timer attributes are only present if the TAD supports a separate DC alarm timer. The wakeup events handling and power management of the TAD is expected to be taken care of by the ACPI PM domain attached to its platform device. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>