diff options
| -rw-r--r-- | drivers/acpi/ec.c | 37 |
1 files changed, 31 insertions, 6 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index f70796081c4c..3fcb9132881e 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -119,6 +119,7 @@ static struct acpi_ec { } *boot_ec, *first_ec; static int EC_FLAGS_MSI; /* Out-of-spec MSI controller */ +static int EC_FLAGS_VALIDATE_ECDT; /* ASUStec ECDTs need to be validated */ /* -------------------------------------------------------------------------- Transaction Management @@ -899,6 +900,33 @@ static const struct acpi_device_id ec_device_ids[] = { {"", 0}, }; +/* ASUStek often supplies us with broken ECDT, validate it */ +static int ec_validate_ecdt(const struct dmi_system_id *id) +{ + EC_FLAGS_VALIDATE_ECDT = 1; + return 0; +} + +/* MSI EC needs special treatment, enable it */ +static int ec_flag_msi(const struct dmi_system_id *id) +{ + EC_FLAGS_MSI = 1; + EC_FLAGS_VALIDATE_ECDT = 1; + return 0; +} + +static struct dmi_system_id __initdata ec_dmi_table[] = { + { + ec_flag_msi, "MSI hardware", { + DMI_MATCH(DMI_BIOS_VENDOR, "Micro-Star"), + DMI_MATCH(DMI_CHASSIS_VENDOR, "MICRO-Star") }, NULL}, + { + ec_validate_ecdt, "ASUS hardware", { + DMI_MATCH(DMI_BIOS_VENDOR, "ASUS") }, NULL}, + {}, +}; + + int __init acpi_ec_ecdt_probe(void) { acpi_status status; @@ -911,11 +939,7 @@ int __init acpi_ec_ecdt_probe(void) /* * Generate a boot ec context */ - if (dmi_name_in_vendors("Micro-Star") || - dmi_name_in_vendors("Notebook")) { - pr_info(PREFIX "Enabling special treatment for EC from MSI.\n"); - EC_FLAGS_MSI = 1; - } + dmi_check_system(ec_dmi_table); status = acpi_get_table(ACPI_SIG_ECDT, 1, (struct acpi_table_header **)&ecdt_ptr); if (ACPI_SUCCESS(status)) { @@ -926,7 +950,7 @@ int __init acpi_ec_ecdt_probe(void) boot_ec->handle = ACPI_ROOT_OBJECT; acpi_get_handle(ACPI_ROOT_OBJECT, ecdt_ptr->id, &boot_ec->handle); /* Don't trust ECDT, which comes from ASUSTek */ - if (!dmi_name_in_vendors("ASUS") && EC_FLAGS_MSI == 0) + if (!EC_FLAGS_VALIDATE_ECDT) goto install; saved_ec = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL); if (!saved_ec) @@ -934,6 +958,7 @@ int __init acpi_ec_ecdt_probe(void) memcpy(saved_ec, boot_ec, sizeof(struct acpi_ec)); /* fall through */ } + /* This workaround is needed only on some broken machines, * which require early EC, but fail to provide ECDT */ printk(KERN_DEBUG PREFIX "Look up EC in DSDT\n"); |