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Diffstat (limited to 'src/acpi/device.c')
-rw-r--r--src/acpi/device.c101
1 files changed, 71 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;