Hi, This short series adds supports for ACPI Fixed Function Hardware(FFH) based Opregion that is being added to ACPI v6.5 The ACPICA support for the same is now merged and imported into linux-next via PM tree. The first patch adds a generic FFH OpRegion handler. Since handling of FFH OpRegion is very platform and the generic handlers just call the platform/ architecture specific callbacks for all the work. The last/second patch adds the ARM64 specific callback which handles FFH OpRegion using arch specific SMC/HVC instructions using SMCCC. The specification can be found at [1]. [1] https://developer.arm.com/docs/den0048/latest Sudeep Holla (2): ACPI: Implement a generic FFH Opregion handler arm64: Add architecture specific ACPI FFH Opregion callbacks arch/arm64/kernel/acpi.c | 106 +++++++++++++++++++++++++++++++++++++++ drivers/acpi/Kconfig | 10 ++++ drivers/acpi/Makefile | 1 + drivers/acpi/acpi_ffh.c | 55 ++++++++++++++++++++ drivers/acpi/bus.c | 6 +++ include/linux/acpi.h | 7 +++ 6 files changed, 185 insertions(+) create mode 100644 drivers/acpi/acpi_ffh.c -- 2.38.1
