diff options
Diffstat (limited to 'drivers/acpi/spcr.c')
| -rw-r--r-- | drivers/acpi/spcr.c | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/drivers/acpi/spcr.c b/drivers/acpi/spcr.c index e94b2023eed5..324b35bfe781 100644 --- a/drivers/acpi/spcr.c +++ b/drivers/acpi/spcr.c @@ -53,17 +53,24 @@ static bool qdf2400_erratum_44_present(struct acpi_table_header *h) */ static bool xgene_8250_erratum_present(struct acpi_table_spcr *tb) { + bool xgene_8250 = false; + if (tb->interface_type != ACPI_DBG2_16550_COMPATIBLE) return false; - if (memcmp(tb->header.oem_id, "APMC0D", ACPI_OEM_ID_SIZE)) + if (memcmp(tb->header.oem_id, "APMC0D", ACPI_OEM_ID_SIZE) && + memcmp(tb->header.oem_id, "HPE ", ACPI_OEM_ID_SIZE)) return false; if (!memcmp(tb->header.oem_table_id, "XGENESPC", ACPI_OEM_TABLE_ID_SIZE) && tb->header.oem_revision == 0) - return true; + xgene_8250 = true; - return false; + if (!memcmp(tb->header.oem_table_id, "ProLiant", + ACPI_OEM_TABLE_ID_SIZE) && tb->header.oem_revision == 1) + xgene_8250 = true; + + return xgene_8250; } /** @@ -182,11 +189,19 @@ int __init parse_spcr(bool earlycon) uart = "qdf2400_e44"; } - if (xgene_8250_erratum_present(table)) + if (xgene_8250_erratum_present(table)) { iotype = "mmio32"; - snprintf(opts, sizeof(opts), "%s,%s,0x%llx,%d", uart, iotype, - table->serial_port.address, baud_rate); + /* for xgene v1 and v2 we don't know the clock rate of the + * UART so don't attempt to change to the baud rate state + * in the table because driver cannot calculate the dividers + */ + snprintf(opts, sizeof(opts), "%s,%s,0x%llx", uart, iotype, + table->serial_port.address); + } else { + snprintf(opts, sizeof(opts), "%s,%s,0x%llx,%d", uart, iotype, + table->serial_port.address, baud_rate); + } pr_info("console: %s\n", opts); |