/* DM should init this device prior to relocation */
#define DM_FLAG_PRE_RELOC (1 << 2)
+/* DM is responsible for allocating and freeing parent_platdata */
+#define DM_FLAG_ALLOC_PARENT_PDATA (1 << 3)
+
/**
* struct udevice - An instance of a driver
*
* @driver: The driver used by this device
* @name: Name of device, typically the FDT node name
* @platdata: Configuration data for this device
+ * @parent_platdata: The parent bus's configuration data for this device
* @of_offset: Device tree node offset for this device (- for none)
+ * @of_id: Pointer to the udevice_id structure which created the device
* @parent: Parent of this device, or NULL for the top level device
* @priv: Private data for this device
* @uclass: Pointer to uclass for this device
* @uclass_priv: The uclass's private data for this device
+ * @parent_priv: The parent's private data for this device
* @uclass_node: Used by uclass to link its devices
* @child_head: List of children of this device
* @sibling_node: Next device in list of all devices
* @flags: Flags for this device DM_FLAG_...
* @req_seq: Requested sequence number for this device (-1 = any)
- * @seq: Allocated sequence number for this device (-1 = none)
+ * @seq: Allocated sequence number for this device (-1 = none). This is set up
+ * when the device is probed and will be unique within the device's uclass.
*/
struct udevice {
struct driver *driver;
const char *name;
void *platdata;
+ void *parent_platdata;
int of_offset;
+ const struct udevice_id *of_id;
struct udevice *parent;
void *priv;
struct uclass *uclass;
void *uclass_priv;
+ void *parent_priv;
struct list_head uclass_node;
struct list_head child_head;
struct list_head sibling_node;
ulong data;
};
+#ifdef CONFIG_OF_CONTROL
+#define of_match_ptr(_ptr) (_ptr)
+#else
+#define of_match_ptr(_ptr) NULL
+#endif /* CONFIG_OF_CONTROL */
+
/**
* struct driver - A driver for a feature or peripheral
*
* @remove: Called to remove a device, i.e. de-activate it
* @unbind: Called to unbind a device from its driver
* @ofdata_to_platdata: Called before probe to decode device tree data
+ * @child_post_bind: Called after a new child has been bound
+ * @child_pre_probe: Called before a child device is probed. The device has
+ * memory allocated but it has not yet been probed.
+ * @child_post_remove: Called after a child device is removed. The device
+ * has memory allocated but its device_remove() method has been called.
* @priv_auto_alloc_size: If non-zero this is the size of the private data
* to be allocated in the device's ->priv pointer. If zero, then the driver
* is responsible for allocating any data required.
* This is typically only useful for device-tree-aware drivers (those with
* an of_match), since drivers which use platdata will have the data
* provided in the U_BOOT_DEVICE() instantiation.
+ * @per_child_auto_alloc_size: Each device can hold private data owned by
+ * its parent. If required this will be automatically allocated if this
+ * value is non-zero.
+ * TODO(sjg@chromium.org): I'm considering dropping this, and just having
+ * device_probe_child() pass it in. So far the use case for allocating it
+ * is SPI, but I found that unsatisfactory. Since it is here I will leave it
+ * until things are clearer.
+ * @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's parent_platdata pointer.
* @ops: Driver-specific operations. This is typically a list of function
* pointers defined by the driver, to implement driver functions required by
* the uclass.
int (*remove)(struct udevice *dev);
int (*unbind)(struct udevice *dev);
int (*ofdata_to_platdata)(struct udevice *dev);
+ int (*child_post_bind)(struct udevice *dev);
+ int (*child_pre_probe)(struct udevice *dev);
+ int (*child_post_remove)(struct udevice *dev);
int priv_auto_alloc_size;
int platdata_auto_alloc_size;
+ int per_child_auto_alloc_size;
+ int per_child_platdata_auto_alloc_size;
const void *ops; /* driver-specific operations */
uint32_t flags;
};
*/
void *dev_get_platdata(struct udevice *dev);
+/**
+ * dev_get_parent_platdata() - Get the parent platform data for a device
+ *
+ * This checks that dev is not NULL, but no other checks for now
+ *
+ * @dev Device to check
+ * @return parent's platform data, or NULL if none
+ */
+void *dev_get_parent_platdata(struct udevice *dev);
+
+/**
+ * dev_get_parentdata() - Get the parent data for a device
+ *
+ * The parent data is data stored in the device but owned by the parent.
+ * For example, a USB device may have parent data which contains information
+ * about how to talk to the device over USB.
+ *
+ * This checks that dev is not NULL, but no other checks for now
+ *
+ * @dev Device to check
+ * @return parent data, or NULL if none
+ */
+void *dev_get_parentdata(struct udevice *dev);
+
/**
* dev_get_priv() - Get the private data for a device
*
*/
void *dev_get_priv(struct udevice *dev);
+/**
+ * struct dev_get_parent() - Get the parent of a device
+ *
+ * @child: Child to check
+ * @return parent of child, or NULL if this is the root device
+ */
+struct udevice *dev_get_parent(struct udevice *child);
+
+/**
+ * dev_get_of_data() - get the device tree data used to bind a device
+ *
+ * When a device is bound using a device tree node, it matches a
+ * particular compatible string as in struct udevice_id. This function
+ * returns the associated data value for that compatible string
+ */
+ulong dev_get_of_data(struct udevice *dev);
+
+/*
+ * device_get_uclass_id() - return the uclass ID of a device
+ *
+ * @dev: Device to check
+ * @return uclass ID for the device
+ */
+enum uclass_id device_get_uclass_id(struct udevice *dev);
+
/**
* device_get_child() - Get the child of a device by index
*
int device_get_child_by_of_offset(struct udevice *parent, int seq,
struct udevice **devp);
+/**
+ * device_find_first_child() - Find the first child of a device
+ *
+ * @parent: Parent device to search
+ * @devp: Returns first child device, or NULL if none
+ * @return 0
+ */
+int device_find_first_child(struct udevice *parent, struct udevice **devp);
+
+/**
+ * device_find_first_child() - Find the first child of a device
+ *
+ * @devp: Pointer to previous child device on entry. Returns pointer to next
+ * child device, or NULL if none
+ * @return 0
+ */
+int device_find_next_child(struct udevice **devp);
+
#endif
projects / karo-tx-uboot.git / blobdiff