diff options
Diffstat (limited to 'drivers/acpi/spcr.c')
| -rw-r--r-- | drivers/acpi/spcr.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/acpi/spcr.c b/drivers/acpi/spcr.c index cd36a97b0ea2..d4d52d5e9016 100644 --- a/drivers/acpi/spcr.c +++ b/drivers/acpi/spcr.c @@ -141,12 +141,23 @@ int __init acpi_parse_spcr(bool enable_earlycon, bool enable_console) case ACPI_DBG2_16550_NVIDIA: uart = "uart"; break; + case ACPI_DBG2_RISCV_SBI_CON: + uart = "sbi"; + break; default: err = -ENOENT; goto done; } - switch (table->baud_rate) { + /* + * SPCR 1.09 defines Precise Baud Rate Filed contains a specific + * non-zero baud rate which overrides the value of the Configured + * Baud Rate field. If this field is zero or not present, Configured + * Baud Rate is used. + */ + if (table->precise_baudrate) + baud_rate = table->precise_baudrate; + else switch (table->baud_rate) { case 0: /* * SPCR 1.04 defines 0 as a preconfigured state of UART. |