The Microsoft Debug Port Table 2 (DBG2) specification revision May 31, 2017 adds support for 16550-compatible Serial Port Subtype with parameters defined in Generic Address Structure (GAS) [1] Add its support in SPCR parsing routine. [1] https://docs.microsoft.com/en-us/windows-hardware/drivers/bringup/acpi-debug-port-table Signed-off-by: Marcin Wojtas <mw@xxxxxxxxxxxx> --- include/acpi/actbl1.h | 1 + drivers/acpi/spcr.c | 1 + 2 files changed, 2 insertions(+) diff --git a/include/acpi/actbl1.h b/include/acpi/actbl1.h index ce59903c2695..f746012eba8d 100644 --- a/include/acpi/actbl1.h +++ b/include/acpi/actbl1.h @@ -498,6 +498,7 @@ struct acpi_dbg2_device { #define ACPI_DBG2_ARM_SBSA_GENERIC 0x000E #define ACPI_DBG2_ARM_DCC 0x000F #define ACPI_DBG2_BCM2835 0x0010 +#define ACPI_DBG2_16550_WITH_GAS 0x0012 #define ACPI_DBG2_1394_STANDARD 0x0000 diff --git a/drivers/acpi/spcr.c b/drivers/acpi/spcr.c index 88460bacd5ae..25c2d0be953e 100644 --- a/drivers/acpi/spcr.c +++ b/drivers/acpi/spcr.c @@ -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: -- 2.29.0
