From 97028ce6fca0fec53ee71e2fd5acfb2dc8430f1f Mon Sep 17 00:00:00 2001 From: Mika Westerberg Date: Mon, 5 Jun 2017 16:39:19 +0800 Subject: 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 Signed-off-by: Lv Zheng Signed-off-by: Bob Moore Signed-off-by: Rafael J. Wysocki --- drivers/acpi/acpica/amlresrc.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'drivers/acpi/acpica/amlresrc.h') diff --git a/drivers/acpi/acpica/amlresrc.h b/drivers/acpi/acpica/amlresrc.h index e34396cab75d..6f8d8f903ffd 100644 --- a/drivers/acpi/acpica/amlresrc.h +++ b/drivers/acpi/acpica/amlresrc.h @@ -85,6 +85,8 @@ #define ACPI_RESTAG_PHASE "_PHA" #define ACPI_RESTAG_PIN "_PIN" #define ACPI_RESTAG_PINCONFIG "_PPI" +#define ACPI_RESTAG_PINCONFIG_TYPE "_TYP" +#define ACPI_RESTAG_PINCONFIG_VALUE "_VAL" #define ACPI_RESTAG_POLARITY "_POL" #define ACPI_RESTAG_REGISTERBITOFFSET "_RBO" #define ACPI_RESTAG_REGISTERBITWIDTH "_RBW" @@ -425,6 +427,26 @@ struct aml_resource_pin_function { #define AML_RESOURCE_PIN_FUNCTION_REVISION 1 /* ACPI 6.2 */ +struct aml_resource_pin_config { + AML_RESOURCE_LARGE_HEADER_COMMON u8 revision_id; + u16 flags; + u8 pin_config_type; + u32 pin_config_value; + u16 pin_table_offset; + u8 res_source_index; + u16 res_source_offset; + u16 vendor_offset; + u16 vendor_length; + /* + * Optional fields follow immediately: + * 1) PIN list (Words) + * 2) Resource Source String + * 3) Vendor Data bytes + */ +}; + +#define AML_RESOURCE_PIN_CONFIG_REVISION 1 /* ACPI 6.2 */ + /* restore default alignment */ #pragma pack() @@ -468,6 +490,7 @@ union aml_resource { struct aml_resource_uart_serialbus uart_serial_bus; struct aml_resource_common_serialbus common_serial_bus; struct aml_resource_pin_function pin_function; + struct aml_resource_pin_config pin_config; /* Utility overlays */ -- cgit v1.2.3