ACPICA: ACPI 6.2: Add support for PinConfig() resource

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/a06fdba6
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 22 insertions, 1 deletions

diff --git a/drivers/acpi/acpica/utresrc.c b/drivers/acpi/acpica/utresrc.c
index 8dd09952b826..2d3e9888837d 100644
--- a/drivers/acpi/acpica/utresrc.c
+++ b/drivers/acpi/acpica/utresrc.c
@@ -291,6 +291,25 @@ const char *acpi_gbl_pt_decode[] = {
 	"/* UNKNOWN parity keyword */"
 };
 
+/* pin_config type */
+
+const char *acpi_gbl_ptyp_decode[] = {
+	"Default",
+	"Bias Pull-up",
+	"Bias Pull-down",
+	"Bias Default",
+	"Bias Disable",
+	"Bias High Impedance",
+	"Bias Bus Hold",
+	"Drive Open Drain",
+	"Drive Open Source",
+	"Drive Push Pull",
+	"Drive Strength",
+	"Slew Rate",
+	"Input Debounce",
+	"Input Schmitt Trigger",
+};
+
 #endif
 
 /*
@@ -334,6 +353,7 @@ const u8 acpi_gbl_resource_aml_sizes[] = {
 	ACPI_AML_SIZE_LARGE(struct aml_resource_gpio),
 	ACPI_AML_SIZE_LARGE(struct aml_resource_pin_function),
 	ACPI_AML_SIZE_LARGE(struct aml_resource_common_serialbus),
+	ACPI_AML_SIZE_LARGE(struct aml_resource_pin_config),
 };
 
 const u8 acpi_gbl_resource_aml_serial_bus_sizes[] = {
@@ -385,7 +405,8 @@ static const u8 acpi_gbl_resource_types[] = {
 	ACPI_FIXED_LENGTH,	/* 0B Extended* address */
 	ACPI_VARIABLE_LENGTH,	/* 0C Gpio* */
 	ACPI_VARIABLE_LENGTH,	/* 0D pin_function */
-	ACPI_VARIABLE_LENGTH	/* 0E *serial_bus */
+	ACPI_VARIABLE_LENGTH,	/* 0E *serial_bus */
+	ACPI_VARIABLE_LENGTH,	/* 0F pin_config */
 };
 
 /*******************************************************************************