Sorry to delaying this, once again :S I found something in the linux pinctrl driver (linux/drivers/pinctrl/intel/pinctrl-intel.c). Look for intel_config_get/set(), intel_pad_usable() and intel_pad_owned_by_host(). pinctrl only allows to control pads that have ownership set to driver. That confirms my initial idea that driver mode is to control which pads are allowed to be altered by the OS (driver mode) or not (ACPI mode). Further, it applies to GPI, as well as GPO.

Patch set 2:Code-Review -1

View Change

To view, visit change 44471. To unsubscribe, or for help writing mail filters, visit settings.