3 files changed, 77 insertions, 0 deletions
diff --git a/include/linux/spi/offload/consumer.h b/include/linux/spi/offload/consumer.h
index 05543dbedf30..5a0ec5303d60 100644
--- a/include/linux/spi/offload/consumer.h
+++ b/include/linux/spi/offload/consumer.h
@@ -19,4 +19,16 @@ struct spi_device;
 struct spi_offload *devm_spi_offload_get(struct device *dev, struct spi_device *spi,
 					 const struct spi_offload_config *config);
 
+struct spi_offload_trigger
+*devm_spi_offload_trigger_get(struct device *dev,
+			      struct spi_offload *offload,
+			      enum spi_offload_trigger_type type);
+int spi_offload_trigger_validate(struct spi_offload_trigger *trigger,
+				 struct spi_offload_trigger_config *config);
+int spi_offload_trigger_enable(struct spi_offload *offload,
+			       struct spi_offload_trigger *trigger,
+			       struct spi_offload_trigger_config *config);
+void spi_offload_trigger_disable(struct spi_offload *offload,
+				 struct spi_offload_trigger *trigger);
+
 #endif /* __LINUX_SPI_OFFLOAD_CONSUMER_H */
diff --git a/include/linux/spi/offload/provider.h b/include/linux/spi/offload/provider.h
index 278c4edfcdb7..76c7cf651092 100644
--- a/include/linux/spi/offload/provider.h
+++ b/include/linux/spi/offload/provider.h
@@ -8,12 +8,40 @@
 #define __LINUX_SPI_OFFLOAD_PROVIDER_H
 
 #include <linux/module.h>
+#include <linux/spi/offload/types.h>
 #include <linux/types.h>
 
 MODULE_IMPORT_NS("SPI_OFFLOAD");
 
 struct device;
+struct spi_offload_trigger;
 
 struct spi_offload *devm_spi_offload_alloc(struct device *dev, size_t priv_size);
 
+struct spi_offload_trigger_ops {
+	bool (*match)(struct spi_offload_trigger *trigger,
+		      enum spi_offload_trigger_type type, u64 *args, u32 nargs);
+	int (*request)(struct spi_offload_trigger *trigger,
+		       enum spi_offload_trigger_type type, u64 *args, u32 nargs);
+	void (*release)(struct spi_offload_trigger *trigger);
+	int (*validate)(struct spi_offload_trigger *trigger,
+			struct spi_offload_trigger_config *config);
+	int (*enable)(struct spi_offload_trigger *trigger,
+		      struct spi_offload_trigger_config *config);
+	void (*disable)(struct spi_offload_trigger *trigger);
+};
+
+struct spi_offload_trigger_info {
+	/** @fwnode: Provider fwnode, used to match to consumer. */
+	struct fwnode_handle *fwnode;
+	/** @ops: Provider-specific callbacks. */
+	const struct spi_offload_trigger_ops *ops;
+	/** Provider-specific state to be used in callbacks. */
+	void *priv;
+};
+
+int devm_spi_offload_trigger_register(struct device *dev,
+				      struct spi_offload_trigger_info *info);
+void *spi_offload_trigger_get_priv(struct spi_offload_trigger *trigger);
+
 #endif /* __LINUX_SPI_OFFLOAD_PROVIDER_H */
diff --git a/include/linux/spi/offload/types.h b/include/linux/spi/offload/types.h
index a74f8d84541b..7476f2073b02 100644
--- a/include/linux/spi/offload/types.h
+++ b/include/linux/spi/offload/types.h
@@ -38,6 +38,43 @@ struct spi_offload {
 	struct device *provider_dev;
 	/** @priv: provider driver private data */
 	void *priv;
+	/** @ops: callbacks for offload support */
+	const struct spi_offload_ops *ops;
+};
+
+enum spi_offload_trigger_type {
+	/* Indication from SPI peripheral that data is read to read. */
+	SPI_OFFLOAD_TRIGGER_DATA_READY,
+	/* Trigger comes from a periodic source such as a clock. */
+	SPI_OFFLOAD_TRIGGER_PERIODIC,
+};
+
+struct spi_offload_trigger_periodic {
+	u64 frequency_hz;
+};
+
+struct spi_offload_trigger_config {
+	/** @type: type discriminator for union */
+	enum spi_offload_trigger_type type;
+	union {
+		struct spi_offload_trigger_periodic periodic;
+	};
+};
+
+/**
+ * struct spi_offload_ops - callbacks implemented by offload providers
+ */
+struct spi_offload_ops {
+	/**
+	 * @trigger_enable: Optional callback to enable the trigger for the
+	 * given offload instance.
+	 */
+	int (*trigger_enable)(struct spi_offload *offload);
+	/**
+	 * @trigger_disable: Optional callback to disable the trigger for the
+	 * given offload instance.
+	 */
+	void (*trigger_disable)(struct spi_offload *offload);
 };
 
 #endif /* __LINUX_SPI_OFFLOAD_TYPES_H */