@@ -784,6 +784,29 @@ struct sdca_entity_iot {
bool is_dataport;
};
+/**
+ * enum sdca_clock_type - SDCA Clock Types
+ *
+ * Indicate the synchronicity of an Clock Entity, see section 6.4.1.3
+ * of the SDCA v1.0 specification.
+ */
+enum sdca_clock_type {
+ SDCA_CLOCK_TYPE_EXTERNAL = 0x00,
+ SDCA_CLOCK_TYPE_INTERNAL_ASYNC = 0x01,
+ SDCA_CLOCK_TYPE_INTERNAL_SYNC = 0x02,
+ SDCA_CLOCK_TYPE_INTERNAL_SOURCE_SYNC = 0x03,
+};
+
+/**
+ * struct sdca_entity_cs - information specific to Clock Source Entities
+ * @type: Synchronicity of the Clock Source.
+ * @max_delay: The maximum delay in microseconds before the clock is stable.
+ */
+struct sdca_entity_cs {
+ enum sdca_clock_type type;
+ unsigned int max_delay;
+};
+
/**
* enum sdca_entity_type - SDCA Entity Type codes
* @SDCA_ENTITY_TYPE_ENTITY_0: Entity 0, not actually from the
@@ -846,6 +869,7 @@ enum sdca_entity_type {
* @num_sources: Number of sources for the Entity.
* @num_controls: Number of Controls for the Entity.
* @iot: Input/Output Terminal specific Entity properties.
+ * @cs: Clock Source specific Entity properties.
*/
struct sdca_entity {
const char *label;
@@ -858,6 +882,7 @@ struct sdca_entity {
int num_controls;
union {
struct sdca_entity_iot iot;
+ struct sdca_entity_cs cs;
};
};
@@ -881,6 +881,33 @@ static int find_sdca_entity_iot(struct device *dev,
return 0;
}
+static int find_sdca_entity_cs(struct device *dev,
+ struct fwnode_handle *entity_node,
+ struct sdca_entity *entity)
+{
+ struct sdca_entity_cs *clock = &entity->cs;
+ u32 tmp;
+ int ret;
+
+ ret = fwnode_property_read_u32(entity_node, "mipi-sdca-cs-type", &tmp);
+ if (ret) {
+ dev_err(dev, "%s: clock type missing: %d\n", entity->label, ret);
+ return ret;
+ }
+
+ clock->type = tmp;
+
+ ret = fwnode_property_read_u32(entity_node,
+ "mipi-sdca-clock-valid-max-delay", &tmp);
+ if (!ret)
+ clock->max_delay = tmp;
+
+ dev_info(dev, "%s: clock type %#x delay %d\n", entity->label,
+ clock->type, clock->max_delay);
+
+ return 0;
+}
+
static int find_sdca_entity(struct device *dev,
struct fwnode_handle *function_node,
struct fwnode_handle *entity_node,
@@ -913,6 +940,9 @@ static int find_sdca_entity(struct device *dev,
case SDCA_ENTITY_TYPE_OT:
ret = find_sdca_entity_iot(dev, entity_node, entity);
break;
+ case SDCA_ENTITY_TYPE_CS:
+ ret = find_sdca_entity_cs(dev, entity_node, entity);
+ break;
default:
break;
}
Add support for parsing the Clock Source Entity properties from DisCo/ACPI. Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com> --- include/sound/sdca_function.h | 25 +++++++++++++++++++++++++ sound/soc/sdca/sdca_functions.c | 30 ++++++++++++++++++++++++++++++ 2 files changed, 55 insertions(+)