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path: root/drivers/acpi
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-rw-r--r--drivers/acpi/spcr.c18
1 files changed, 16 insertions, 2 deletions
diff --git a/drivers/acpi/spcr.c b/drivers/acpi/spcr.c
index 3afa8c1fa127..29050630f3da 100644
--- a/drivers/acpi/spcr.c
+++ b/drivers/acpi/spcr.c
@@ -74,8 +74,22 @@ int __init parse_spcr(bool earlycon)
goto done;
}
- iotype = table->serial_port.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY ?
- "mmio" : "io";
+ if (table->serial_port.space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
+ switch (table->serial_port.access_width) {
+ default:
+ pr_err("Unexpected SPCR Access Width. Defaulting to byte size\n");
+ case ACPI_ACCESS_SIZE_BYTE:
+ iotype = "mmio";
+ break;
+ case ACPI_ACCESS_SIZE_WORD:
+ iotype = "mmio16";
+ break;
+ case ACPI_ACCESS_SIZE_DWORD:
+ iotype = "mmio32";
+ break;
+ }
+ } else
+ iotype = "io";
switch (table->interface_type) {
case ACPI_DBG2_ARM_SBSA_32BIT: