diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/acpi/device.c | 101 | ||||
| -rw-r--r-- | src/include/acpi/acpi_device.h | 5 |
2 files changed, 76 insertions, 30 deletions
diff --git a/src/acpi/device.c b/src/acpi/device.c index 8b03bfd6af..9e8efa4e8c 100644 --- a/src/acpi/device.c +++ b/src/acpi/device.c @@ -53,7 +53,7 @@ const char *acpi_device_name(const struct device *dev) return NULL; /* Check for device specific handler */ - if (dev->ops->acpi_name) + if (dev->ops && dev->ops->acpi_name) return dev->ops->acpi_name(dev); /* Walk up the tree to find if any parent can identify this device */ @@ -658,10 +658,48 @@ static void acpi_dp_free(struct acpi_dp *dp) } } +static bool acpi_dp_write_properties(struct acpi_dp *prop, const char *uuid) +{ + struct acpi_dp *dp; + char *prop_count = NULL; + + /* Print base properties */ + for (dp = prop; dp; dp = dp->next) { + if (dp->type == ACPI_DP_TYPE_TABLE || + dp->type == ACPI_DP_TYPE_CHILD || + dp->type == ACPI_DP_TYPE_PACKAGE) + continue; + + /* + * The UUID and package is only added when + * we come across the first property. This + * is to avoid creating a zero-length package + * in situations where there are only children. + */ + if (!prop_count) { + /* ToUUID (dp->uuid) */ + acpigen_write_uuid(uuid); + /* + * Package (PROP), element count determined as + * it is populated + */ + prop_count = acpigen_write_package(0); + } + (*prop_count)++; + acpi_dp_write_property(dp); + } + if (prop_count) { + /* Package (PROP) length, if a package was written */ + acpigen_pop_len(); + return true; + } + return false; +} + void acpi_dp_write(struct acpi_dp *table) { struct acpi_dp *dp, *prop; - char *dp_count, *prop_count = NULL; + char *dp_count; int child_count = 0; if (!table || table->type != ACPI_DP_TYPE_TABLE || !table->next) @@ -677,37 +715,17 @@ void acpi_dp_write(struct acpi_dp *table) dp_count = acpigen_write_package(0); /* Print base properties */ - for (dp = prop; dp; dp = dp->next) { - if (dp->type == ACPI_DP_TYPE_CHILD) { + if (acpi_dp_write_properties(prop, table->uuid)) + *dp_count += 2; + + /* Count child properties */ + for (dp = prop; dp; dp = dp->next) + if (dp->type == ACPI_DP_TYPE_CHILD) child_count++; - } else { - /* - * The UUID and package is only added when - * we come across the first property. This - * is to avoid creating a zero-length package - * in situations where there are only children. - */ - if (!prop_count) { - *dp_count += 2; - /* ToUUID (ACPI_DP_UUID) */ - acpigen_write_uuid(ACPI_DP_UUID); - /* - * Package (PROP), element count determined as - * it is populated - */ - prop_count = acpigen_write_package(0); - } - (*prop_count)++; - acpi_dp_write_property(dp); - } - } - if (prop_count) { - /* Package (PROP) length, if a package was written */ - acpigen_pop_len(); - } + /* Add child properties to the base table */ if (child_count) { - /* Update DP package count to 2 or 4 */ + /* Update DP package count */ *dp_count += 2; /* ToUUID (ACPI_DP_CHILD_UUID) */ acpigen_write_uuid(ACPI_DP_CHILD_UUID); @@ -722,6 +740,12 @@ void acpi_dp_write(struct acpi_dp *table) acpigen_pop_len(); } + /* Write packages of properties with unique UUID */ + for (dp = prop; dp; dp = dp->next) + if (dp->type == ACPI_DP_TYPE_PACKAGE) + if (acpi_dp_write_properties(dp->child, dp->uuid)) + *dp_count += 2; + /* Package (DP) length */ acpigen_pop_len(); @@ -746,6 +770,7 @@ static struct acpi_dp *acpi_dp_new(struct acpi_dp *dp, enum acpi_dp_type type, memset(new, 0, sizeof(*new)); new->type = type; new->name = name; + new->uuid = ACPI_DP_UUID; if (dp) { /* Add to end of property list */ @@ -863,6 +888,22 @@ struct acpi_dp *acpi_dp_add_child(struct acpi_dp *dp, const char *name, return new; } +struct acpi_dp *acpi_dp_add_package(struct acpi_dp *dp, struct acpi_dp *package) +{ + struct acpi_dp *new; + + if (!dp || !package || package->type != ACPI_DP_TYPE_TABLE) + return NULL; + + new = acpi_dp_new(dp, ACPI_DP_TYPE_PACKAGE, NULL); + if (new) { + new->uuid = package->name; + new->child = package; + } + + return new; +} + struct acpi_dp *acpi_dp_add_array(struct acpi_dp *dp, struct acpi_dp *array) { struct acpi_dp *new; diff --git a/src/include/acpi/acpi_device.h b/src/include/acpi/acpi_device.h index 20dd8a4080..2c2c67a119 100644 --- a/src/include/acpi/acpi_device.h +++ b/src/include/acpi/acpi_device.h @@ -15,11 +15,13 @@ enum acpi_dp_type { ACPI_DP_TYPE_TABLE, ACPI_DP_TYPE_ARRAY, ACPI_DP_TYPE_CHILD, + ACPI_DP_TYPE_PACKAGE, }; struct acpi_dp { enum acpi_dp_type type; const char *name; + const char *uuid; struct acpi_dp *next; union { struct acpi_dp *child; @@ -464,6 +466,9 @@ void acpi_device_add_power_res(const struct acpi_power_res_params *params); /* Start a new Device Property table with provided ACPI reference */ struct acpi_dp *acpi_dp_new_table(const char *ref); +/* Add package of device properties with a unique UUID */ +struct acpi_dp *acpi_dp_add_package(struct acpi_dp *dp, struct acpi_dp *package); + /* Add integer Device Property */ struct acpi_dp *acpi_dp_add_integer(struct acpi_dp *dp, const char *name, uint64_t value); |