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ACPI: SPCR: Add support for the new 16550-compatible Serial Port Subtype 

The Microsoft Debug Port Table 2 (DBG2) specification revision
May 31, 2017 added definition of the 16550-compatible Serial Port
Subtype with parameters defined in Generic Address Structure (GAS) [1]

Add its support in the SPCR table parsing routine.

[1] https://docs.microsoft.com/en-us/windows-hardware/drivers/bringup/acpi-debug-port-table

Signed-off-by: Marcin Wojtas <mw@semihalf.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Marcin Wojtas 2021-07-14 23:43:46 +02:00 committed by Rafael J. Wysocki
parent 7c60610d47
commit 2aaea6a164
1 changed files with 1 additions and 0 deletions
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1
drivers/acpi/spcr.c
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@ -136,6 +136,7 @@ int __init acpi_parse_spcr(bool enable_earlycon, bool enable_console)
break;
case ACPI_DBG2_16550_COMPATIBLE:
case ACPI_DBG2_16550_SUBSET:
case ACPI_DBG2_16550_WITH_GAS:
uart = "uart";
break;
default: