• Mika Westerberg's avatar
    ACPICA: ACPI 6.2: Add support for PinConfig() resource · 97028ce6
    Mika Westerberg authored
    ACPICA commit a06fdba686cefccd5dd5b93b52fa0f1e3f984906
    
    ACPI 6.2 introduced a new resource that is used to specify fine-grained
    configuration of a pin or set of pins used by a device. The ASL syntax of
    this new resource looks like:
    
      PinConfig (Shared/Exclusive, PinConfigType, PinConfigValue,
                 ResourceSource, ResourceSourceIndex, ResourceUsage,
                 DescriptorName, Vendordata) {Pin List}
    
    PinConfigType is an integer with following accepted values:
    
      0x00 (Default) - No configuration is applied to the pin
      0x01 (Bias Pull-up) - Pin is pulled up using certain size resistor
      0x02 (Bias Pull-down) - Pin is pulled down using certain size resistor
      0x03 (Bias Default) - Set to default biasing
      0x04 (Bias Disable) - All bias settings will be disabled
      0x05 (Bias High Impedance) - Configure the pin as hi_z
      0x06 (Bias Bus Hold) - Configure the pin in a weak latch state where
                             it drives the last value on a tristate bus
      0x07 (Drive Open Drain) - Configure the pin into open drain state
      0x08 (Drive Open Source) - Configure the pin into open source state
      0x09 (Drive Push Pull) - Configure the pin into push-pull state
      0x0a (Drive Strength) - How much the pin can supply current
      0x0b (Slew Rate) - Configure slew rate of the pin
      0x0c (Input Debounce) - Enable input debouncer for the pin
      0x0d (Input Schmitt Trigger) - Enable schmitt trigger for the pin
      0x0e - 0x7f - Reserved
      0x80 - 0xff - Vendor defined types
    
    The PinConfigValue depends on the type and is expressed as units
    suitable for that type (for example bias uses Ohms).
    
    Link: https://github.com/acpica/acpica/commit/a06fdba6Signed-off-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
    Signed-off-by: default avatarLv Zheng <lv.zheng@intel.com>
    Signed-off-by: default avatarBob Moore <robert.moore@intel.com>
    Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
    97028ce6
acutils.h 21 KB