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The same virtual GPIO strategy is also used for the AXP288 PMIC in that various control methods that are used to do power rail handling and sensor reading/setting will touch GPIO fields defined under the PMIC device. The GPIO fileds are only defined by the ACPI code while the actual hardware doesn't really have a GPIO controller, but to make those control method execution succeed, we have to install a GPIO handler for the PMIC device handle. Since we do not need the virtual GPIO strategy, we can simply do nothing in that handler. Signed-off-by: Aaron Lu <aaron.lu@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>