#define _DM_UCLASS_H
#include <dm/uclass-id.h>
+#include <linker_lists.h>
#include <linux/list.h>
/**
* @priv: Private data for this uclass
* @uc_drv: The driver for the uclass itself, not to be confused with a
* 'struct driver'
- * dev_head: List of devices in this uclass (devices are attached to their
+ * @dev_head: List of devices in this uclass (devices are attached to their
* uclass when their bind method is called)
* @sibling_node: Next uclass in the linked list of uclasses
*/
struct list_head sibling_node;
};
-struct device;
+struct udevice;
+
+/* Members of this uclass sequence themselves with aliases */
+#define DM_UC_FLAG_SEQ_ALIAS (1 << 0)
/**
* struct uclass_driver - Driver for the uclass
* @pre_unbind: Called before a device is unbound from this uclass
* @post_probe: Called after a new device is probed
* @pre_remove: Called before a device is removed
+ * @child_post_bind: Called after a child is bound to a device in this uclass
* @init: Called to set up the uclass
* @destroy: Called to destroy the uclass
* @priv_auto_alloc_size: If non-zero this is the size of the private data
* @per_device_auto_alloc_size: Each device can hold private data owned
* by the uclass. If required this will be automatically allocated if this
* value is non-zero.
+ * @per_child_auto_alloc_size: Each child device (of a parent in this
+ * uclass) can hold parent data for the device/uclass. This value is only
+ * used as a falback if this member is 0 in the driver.
+ * @per_child_platdata_auto_alloc_size: A bus likes to store information about
+ * its children. If non-zero this is the size of this data, to be allocated
+ * in the child device's parent_platdata pointer. This value is only used as
+ * a falback if this member is 0 in the driver.
* @ops: Uclass operations, providing the consistent interface to devices
* within the uclass.
+ * @flags: Flags for this uclass (DM_UC_...)
*/
struct uclass_driver {
const char *name;
enum uclass_id id;
- int (*post_bind)(struct device *dev);
- int (*pre_unbind)(struct device *dev);
- int (*post_probe)(struct device *dev);
- int (*pre_remove)(struct device *dev);
+ int (*post_bind)(struct udevice *dev);
+ int (*pre_unbind)(struct udevice *dev);
+ int (*post_probe)(struct udevice *dev);
+ int (*pre_remove)(struct udevice *dev);
+ int (*child_post_bind)(struct udevice *dev);
int (*init)(struct uclass *class);
int (*destroy)(struct uclass *class);
int priv_auto_alloc_size;
int per_device_auto_alloc_size;
+ int per_child_auto_alloc_size;
+ int per_child_platdata_auto_alloc_size;
const void *ops;
+ uint32_t flags;
};
/* Declare a new uclass_driver */
/**
* uclass_get_device() - Get a uclass device based on an ID and index
*
- * id: ID to look up
+ * The device is probed to activate it ready for use.
+ *
+ * @id: ID to look up
* @index: Device number within that uclass (0=first)
- * @ucp: Returns pointer to uclass (there is only one per for each ID)
+ * @devp: Returns pointer to device (there is only one per for each ID)
+ * @return 0 if OK, -ve on error
+ */
+int uclass_get_device(enum uclass_id id, int index, struct udevice **devp);
+
+/**
+ * uclass_get_device_by_seq() - Get a uclass device based on an ID and sequence
+ *
+ * If an active device has this sequence it will be returned. If there is no
+ * such device then this will check for a device that is requesting this
+ * sequence.
+ *
+ * The device is probed to activate it ready for use.
+ *
+ * @id: ID to look up
+ * @seq: Sequence number to find (0=first)
+ * @devp: Returns pointer to device (there is only one for each seq)
+ * @return 0 if OK, -ve on error
+ */
+int uclass_get_device_by_seq(enum uclass_id id, int seq, struct udevice **devp);
+
+/**
+ * uclass_get_device_by_of_offset() - Get a uclass device by device tree node
+ *
+ * This searches the devices in the uclass for one attached to the given
+ * device tree node.
+ *
+ * The device is probed to activate it ready for use.
+ *
+ * @id: ID to look up
+ * @node: Device tree offset to search for (if -ve then -ENODEV is returned)
+ * @devp: Returns pointer to device (there is only one for each node)
* @return 0 if OK, -ve on error
*/
-int uclass_get_device(enum uclass_id id, int index, struct device **ucp);
+int uclass_get_device_by_of_offset(enum uclass_id id, int node,
+ struct udevice **devp);
/**
* uclass_first_device() - Get the first device in a uclass
*
+ * The device returned is probed if necessary, and ready for use
+ *
* @id: Uclass ID to look up
* @devp: Returns pointer to the first device in that uclass, or NULL if none
* @return 0 if OK (found or not found), -1 on error
*/
-int uclass_first_device(enum uclass_id id, struct device **devp);
+int uclass_first_device(enum uclass_id id, struct udevice **devp);
/**
* uclass_next_device() - Get the next device in a uclass
*
+ * The device returned is probed if necessary, and ready for use
+ *
* @devp: On entry, pointer to device to lookup. On exit, returns pointer
* to the next device in the same uclass, or NULL if none
* @return 0 if OK (found or not found), -1 on error
*/
-int uclass_next_device(struct device **devp);
+int uclass_next_device(struct udevice **devp);
+
+/**
+ * uclass_resolve_seq() - Resolve a device's sequence number
+ *
+ * On entry dev->seq is -1, and dev->req_seq may be -1 (to allocate a
+ * sequence number automatically, or >= 0 to select a particular number.
+ * If the requested sequence number is in use, then this device will
+ * be allocated another one.
+ *
+ * Note that the device's seq value is not changed by this function.
+ *
+ * @dev: Device for which to allocate sequence number
+ * @return sequence number allocated, or -ve on error
+ */
+int uclass_resolve_seq(struct udevice *dev);
/**
* uclass_foreach_dev() - Helper function to iteration through devices
* This creates a for() loop which works through the available devices in
* a uclass in order from start to end.
*
- * @pos: struct device * to hold the current device. Set to NULL when there
+ * @pos: struct udevice * to hold the current device. Set to NULL when there
* are no more devices.
- * uc: uclass to scan
+ * @uc: uclass to scan
*/
#define uclass_foreach_dev(pos, uc) \
for (pos = list_entry((&(uc)->dev_head)->next, typeof(*pos), \
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