core: extend struct driver_info to point to device

Currently when creating an U_BOOT_DEVICE entry a struct driver_info
is declared, which contains the data needed to instantiate the device.
However, the actual device is created at runtime and there is no proper
way to get the device based on its struct driver_info.

This patch extends struct driver_info adding a pointer to udevice which
is populated during the bind process, allowing to generate a set of
functions to get the device based on its struct driver_info.

Signed-off-by: Walter Lozano <walter.lozano@collabora.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

2 files changed, 29 insertions, 0 deletions

diff --git a/include/dm/device.h b/include/dm/device.h
index 2cfe10766f..f5738a0cee 100644
--- a/include/dm/device.h
+++ b/include/dm/device.h
@@ -539,6 +539,21 @@ int device_find_global_by_ofnode(ofnode node, struct udevice **devp);
 int device_get_global_by_ofnode(ofnode node, struct udevice **devp);
 
 /**
+ * device_get_by_driver_info() - Get a device based on driver_info
+ *
+ * Locates a device by its struct driver_info, by using its reference which
+ * is updated during the bind process.
+ *
+ * The device is probed to activate it ready for use.
+ *
+ * @info: Struct driver_info
+ * @devp: Returns pointer to device if found, otherwise this is set to NULL
+ * @return 0 if OK, -ve on error
+ */
+int device_get_by_driver_info(const struct driver_info *info,
+			      struct udevice **devp);
+
+/**
  * device_find_first_child() - Find the first child of a device
  *
  * @parent: Parent device to search
diff --git a/include/dm/platdata.h b/include/dm/platdata.h
index c972fa6936..cab93b071b 100644
--- a/include/dm/platdata.h
+++ b/include/dm/platdata.h
@@ -22,12 +22,14 @@
  * @name:	Driver name
  * @platdata:	Driver-specific platform data
  * @platdata_size: Size of platform data structure
+ * @dev:	Device created from this structure data
  */
 struct driver_info {
 	const char *name;
 	const void *platdata;
 #if CONFIG_IS_ENABLED(OF_PLATDATA)
 	uint platdata_size;
+	struct udevice *dev;
 #endif
 };
 
@@ -43,4 +45,16 @@ struct driver_info {
 #define U_BOOT_DEVICES(__name)						\
 	ll_entry_declare_list(struct driver_info, __name, driver_info)
 
+/* Get a pointer to a given driver */
+#define DM_GET_DEVICE(__name)						\
+	ll_entry_get(struct driver_info, __name, driver_info)
+
+/**
+ * dm_populate_phandle_data() - Populates phandle data in platda
+ *
+ * This populates phandle data with an U_BOOT_DEVICE entry get by
+ * DM_GET_DEVICE. The implementation of this function will be done
+ * by dtoc when parsing dtb.
+ */
+void dm_populate_phandle_data(void);
 #endif