/* Device name is allocated and should be freed on unbind() */
#define DM_FLAG_NAME_ALLOCED (1 << 7)
+/* Device has platform data provided by of-platdata */
#define DM_FLAG_OF_PLATDATA (1 << 8)
/*
*/
#define DM_FLAG_OS_PREPARE (1 << 10)
+/* DM does not enable/disable the power domains corresponding to this device */
+#define DM_FLAG_DEFAULT_PD_CTRL_OFF (1 << 11)
+
+/* Driver platdata has been read. Cleared when the device is removed */
+#define DM_FLAG_PLATDATA_VALID (1 << 12)
+
/*
* One or multiple of these flags are passed to device_remove() so that
* a selective device removal as specified by the remove-stage and the
* @return 0 if OK, -ENODEV if no such device, other error if the device fails
* to probe
*/
-int device_get_child(struct udevice *parent, int index, struct udevice **devp);
+int device_get_child(const struct udevice *parent, int index,
+ struct udevice **devp);
/**
* device_get_child_count() - Get the available child count of a device
*
* @parent: Parent device to check
*/
-int device_get_child_count(struct udevice *parent);
+int device_get_child_count(const struct udevice *parent);
/**
* device_find_child_by_seq() - Find a child device based on a sequence
* Set to NULL if none is found
* @return 0 if OK, -ve on error
*/
-int device_find_child_by_seq(struct udevice *parent, int seq_or_req_seq,
+int device_find_child_by_seq(const struct udevice *parent, int seq_or_req_seq,
bool find_req_seq, struct udevice **devp);
/**
* Set to NULL if none is found
* @return 0 if OK, -ve on error
*/
-int device_get_child_by_seq(struct udevice *parent, int seq,
+int device_get_child_by_seq(const struct udevice *parent, int seq,
struct udevice **devp);
/**
* @devp: Returns pointer to device if found, otherwise this is set to NULL
* @return 0 if OK, -ve on error
*/
-int device_find_child_by_of_offset(struct udevice *parent, int of_offset,
+int device_find_child_by_of_offset(const struct udevice *parent, int of_offset,
struct udevice **devp);
/**
* @devp: Returns pointer to device if found, otherwise this is set to NULL
* @return 0 if OK, -ve on error
*/
-int device_get_child_by_of_offset(struct udevice *parent, int of_offset,
+int device_get_child_by_of_offset(const struct udevice *parent, int of_offset,
struct udevice **devp);
/**
* @devp: Returns first child device, or NULL if none
* @return 0
*/
-int device_find_first_child(struct udevice *parent, struct udevice **devp);
+int device_find_first_child(const struct udevice *parent,
+ struct udevice **devp);
/**
* device_find_next_child() - Find the next child of a device
* @devp: Returns device found, if any
* @return 0 if found, else -ENODEV
*/
-int device_find_first_inactive_child(struct udevice *parent,
+int device_find_first_inactive_child(const struct udevice *parent,
enum uclass_id uclass_id,
struct udevice **devp);
* @devp: Returns first child device in that uclass, if any
* @return 0 if found, else -ENODEV
*/
-int device_find_first_child_by_uclass(struct udevice *parent,
+int device_find_first_child_by_uclass(const struct udevice *parent,
enum uclass_id uclass_id,
struct udevice **devp);
* @devp: Returns device found, if any
* @return 0 if found, else -ENODEV
*/
-int device_find_child_by_name(struct udevice *parent, const char *name,
+int device_find_child_by_name(const struct udevice *parent, const char *name,
struct udevice **devp);
+/**
+ * device_first_child_ofdata_err() - Find the first child and reads its platdata
+ *
+ * The ofdata_to_platdata() method is called on the child before it is returned,
+ * but the child is not probed.
+ *
+ * @parent: Parent to check
+ * @devp: Returns child that was found, if any
+ * @return 0 on success, -ENODEV if no children, other -ve on error
+ */
+int device_first_child_ofdata_err(struct udevice *parent,
+ struct udevice **devp);
+
+/*
+ * device_next_child_ofdata_err() - Find the next child and read its platdata
+ *
+ * The ofdata_to_platdata() method is called on the child before it is returned,
+ * but the child is not probed.
+ *
+ * @devp: On entry, points to the previous child; on exit returns the child that
+ * was found, if any
+ * @return 0 on success, -ENODEV if no children, other -ve on error
+ */
+int device_next_child_ofdata_err(struct udevice **devp);
+
+/**
+ * device_first_child_err() - Get the first child of a device
+ *
+ * The device returned is probed if necessary, and ready for use
+ *
+ * @parent: Parent device to search
+ * @devp: Returns device found, if any
+ * @return 0 if found, -ENODEV if not, -ve error if device failed to probe
+ */
+int device_first_child_err(struct udevice *parent, struct udevice **devp);
+
+/**
+ * device_next_child_err() - Get the next child of a parent device
+ *
+ * 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 sibling if no error occurred
+ * @return 0 if found, -ENODEV if not, -ve error if device failed to probe
+ */
+int device_next_child_err(struct udevice **devp);
+
/**
* device_has_children() - check if a device has any children
*
* @return true if the device has one or more children and at least one of
* them is active (probed).
*/
-bool device_has_active_children(struct udevice *dev);
+bool device_has_active_children(const struct udevice *dev);
/**
* device_is_last_sibling() - check if a device is the last sibling
* @return true if there are no more siblings after this one - i.e. is it
* last in the list.
*/
-bool device_is_last_sibling(struct udevice *dev);
+bool device_is_last_sibling(const struct udevice *dev);
/**
* device_set_name() - set the name of a device
* device
* @return true if OK, false if the compatible is not found
*/
-bool device_is_compatible(struct udevice *dev, const char *compat);
+bool device_is_compatible(const struct udevice *dev, const char *compat);
/**
* of_machine_is_compatible() - check if the machine is compatible with
* @dev: device to test
* @return: true if it is on a PCI bus, false otherwise
*/
-static inline bool device_is_on_pci_bus(struct udevice *dev)
+static inline bool device_is_on_pci_bus(const struct udevice *dev)
{
return device_get_uclass_id(dev->parent) == UCLASS_PCI;
}
list_for_each_entry(pos, &parent->child_head, sibling_node)
/**
- * dm_scan_fdt_dev() - Bind child device in a the device tree
- *
- * This handles device which have sub-nodes in the device tree. It scans all
- * sub-nodes and binds drivers for each node where a driver can be found.
- *
- * If this is called prior to relocation, only pre-relocation devices will be
- * bound (those marked with u-boot,dm-pre-reloc in the device tree, or where
- * the driver has the DM_FLAG_PRE_RELOC flag set). Otherwise, all devices will
- * be bound.
- *
- * @dev: Device to scan
- * @return 0 if OK, -ve on error
- */
-int dm_scan_fdt_dev(struct udevice *dev);
-
-/* device resource management */
-typedef void (*dr_release_t)(struct udevice *dev, void *res);
-typedef int (*dr_match_t)(struct udevice *dev, void *res, void *match_data);
-
-#ifdef CONFIG_DEVRES
-
-#ifdef CONFIG_DEBUG_DEVRES
-void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp,
- const char *name);
-#define _devres_alloc(release, size, gfp) \
- __devres_alloc(release, size, gfp, #release)
-#else
-void *_devres_alloc(dr_release_t release, size_t size, gfp_t gfp);
-#endif
-
-/**
- * devres_alloc() - Allocate device resource data
- * @release: Release function devres will be associated with
- * @size: Allocation size
- * @gfp: Allocation flags
- *
- * Allocate devres of @size bytes. The allocated area is associated
- * with @release. The returned pointer can be passed to
- * other devres_*() functions.
- *
- * RETURNS:
- * Pointer to allocated devres on success, NULL on failure.
- */
-#define devres_alloc(release, size, gfp) \
- _devres_alloc(release, size, gfp | __GFP_ZERO)
-
-/**
- * devres_free() - Free device resource data
- * @res: Pointer to devres data to free
+ * device_foreach_child_ofdata_to_platdata() - iterate through children
*
- * Free devres created with devres_alloc().
- */
-void devres_free(void *res);
+ * This stops when it gets an error, with @pos set to the device that failed to
+ * read ofdata.
-/**
- * devres_add() - Register device resource
- * @dev: Device to add resource to
- * @res: Resource to register
- *
- * Register devres @res to @dev. @res should have been allocated
- * using devres_alloc(). On driver detach, the associated release
- * function will be invoked and devres will be freed automatically.
- */
-void devres_add(struct udevice *dev, void *res);
-
-/**
- * devres_find() - Find device resource
- * @dev: Device to lookup resource from
- * @release: Look for resources associated with this release function
- * @match: Match function (optional)
- * @match_data: Data for the match function
- *
- * Find the latest devres of @dev which is associated with @release
- * and for which @match returns 1. If @match is NULL, it's considered
- * to match all.
+ * This creates a for() loop which works through the available children of
+ * a device in order from start to end. Device ofdata is read by calling
+ * device_ofdata_to_platdata() on each one. The devices are not probed.
*
- * @return pointer to found devres, NULL if not found.
- */
-void *devres_find(struct udevice *dev, dr_release_t release,
- dr_match_t match, void *match_data);
-
-/**
- * devres_get() - Find devres, if non-existent, add one atomically
- * @dev: Device to lookup or add devres for
- * @new_res: Pointer to new initialized devres to add if not found
- * @match: Match function (optional)
- * @match_data: Data for the match function
- *
- * Find the latest devres of @dev which has the same release function
- * as @new_res and for which @match return 1. If found, @new_res is
- * freed; otherwise, @new_res is added atomically.
- *
- * @return ointer to found or added devres.
- */
-void *devres_get(struct udevice *dev, void *new_res,
- dr_match_t match, void *match_data);
-
-/**
- * devres_remove() - Find a device resource and remove it
- * @dev: Device to find resource from
- * @release: Look for resources associated with this release function
- * @match: Match function (optional)
- * @match_data: Data for the match function
- *
- * Find the latest devres of @dev associated with @release and for
- * which @match returns 1. If @match is NULL, it's considered to
- * match all. If found, the resource is removed atomically and
- * returned.
- *
- * @return ointer to removed devres on success, NULL if not found.
+ * @pos: struct udevice * for the current device
+ * @parent: parent device to scan
*/
-void *devres_remove(struct udevice *dev, dr_release_t release,
- dr_match_t match, void *match_data);
+#define device_foreach_child_ofdata_to_platdata(pos, parent) \
+ for (int _ret = device_first_child_ofdata_err(parent, &dev); !_ret; \
+ _ret = device_next_child_ofdata_err(&dev))
/**
- * devres_destroy() - Find a device resource and destroy it
- * @dev: Device to find resource from
- * @release: Look for resources associated with this release function
- * @match: Match function (optional)
- * @match_data: Data for the match function
+ * device_foreach_child_probe() - iterate through children, probing them
*
- * Find the latest devres of @dev associated with @release and for
- * which @match returns 1. If @match is NULL, it's considered to
- * match all. If found, the resource is removed atomically and freed.
+ * This creates a for() loop which works through the available children of
+ * a device in order from start to end. Devices are probed if necessary,
+ * and ready for use.
*
- * Note that the release function for the resource will not be called,
- * only the devres-allocated data will be freed. The caller becomes
- * responsible for freeing any other data.
+ * This stops when it gets an error, with @pos set to the device that failed to
+ * probe
*
- * @return 0 if devres is found and freed, -ENOENT if not found.
- */
-int devres_destroy(struct udevice *dev, dr_release_t release,
- dr_match_t match, void *match_data);
-
-/**
- * devres_release() - Find a device resource and destroy it, calling release
- * @dev: Device to find resource from
- * @release: Look for resources associated with this release function
- * @match: Match function (optional)
- * @match_data: Data for the match function
- *
- * Find the latest devres of @dev associated with @release and for
- * which @match returns 1. If @match is NULL, it's considered to
- * match all. If found, the resource is removed atomically, the
- * release function called and the resource freed.
- *
- * @return 0 if devres is found and freed, -ENOENT if not found.
+ * @pos: struct udevice * for the current device
+ * @parent: parent device to scan
*/
-int devres_release(struct udevice *dev, dr_release_t release,
- dr_match_t match, void *match_data);
+#define device_foreach_child_probe(pos, parent) \
+ for (int _ret = device_first_child_err(parent, &dev); !_ret; \
+ _ret = device_next_child_err(&dev))
-/* managed devm_k.alloc/kfree for device drivers */
/**
- * devm_kmalloc() - Resource-managed kmalloc
- * @dev: Device to allocate memory for
- * @size: Allocation size
- * @gfp: Allocation gfp flags
+ * dm_scan_fdt_dev() - Bind child device in a the device tree
*
- * Managed kmalloc. Memory allocated with this function is
- * automatically freed on driver detach. Like all other devres
- * resources, guaranteed alignment is unsigned long long.
+ * This handles device which have sub-nodes in the device tree. It scans all
+ * sub-nodes and binds drivers for each node where a driver can be found.
*
- * @return pointer to allocated memory on success, NULL on failure.
- */
-void *devm_kmalloc(struct udevice *dev, size_t size, gfp_t gfp);
-static inline void *devm_kzalloc(struct udevice *dev, size_t size, gfp_t gfp)
-{
- return devm_kmalloc(dev, size, gfp | __GFP_ZERO);
-}
-static inline void *devm_kmalloc_array(struct udevice *dev,
- size_t n, size_t size, gfp_t flags)
-{
- if (size != 0 && n > SIZE_MAX / size)
- return NULL;
- return devm_kmalloc(dev, n * size, flags);
-}
-static inline void *devm_kcalloc(struct udevice *dev,
- size_t n, size_t size, gfp_t flags)
-{
- return devm_kmalloc_array(dev, n, size, flags | __GFP_ZERO);
-}
-
-/**
- * devm_kfree() - Resource-managed kfree
- * @dev: Device this memory belongs to
- * @ptr: Memory to free
+ * If this is called prior to relocation, only pre-relocation devices will be
+ * bound (those marked with u-boot,dm-pre-reloc in the device tree, or where
+ * the driver has the DM_FLAG_PRE_RELOC flag set). Otherwise, all devices will
+ * be bound.
*
- * Free memory allocated with devm_kmalloc().
+ * @dev: Device to scan
+ * @return 0 if OK, -ve on error
*/
-void devm_kfree(struct udevice *dev, void *ptr);
-
-#else /* ! CONFIG_DEVRES */
-
-static inline void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp)
-{
- return kzalloc(size, gfp);
-}
-
-static inline void devres_free(void *res)
-{
- kfree(res);
-}
-
-static inline void devres_add(struct udevice *dev, void *res)
-{
-}
-
-static inline void *devres_find(struct udevice *dev, dr_release_t release,
- dr_match_t match, void *match_data)
-{
- return NULL;
-}
-
-static inline void *devres_get(struct udevice *dev, void *new_res,
- dr_match_t match, void *match_data)
-{
- return NULL;
-}
-
-static inline void *devres_remove(struct udevice *dev, dr_release_t release,
- dr_match_t match, void *match_data)
-{
- return NULL;
-}
-
-static inline int devres_destroy(struct udevice *dev, dr_release_t release,
- dr_match_t match, void *match_data)
-{
- return 0;
-}
-
-static inline int devres_release(struct udevice *dev, dr_release_t release,
- dr_match_t match, void *match_data)
-{
- return 0;
-}
-
-static inline void *devm_kmalloc(struct udevice *dev, size_t size, gfp_t gfp)
-{
- return kmalloc(size, gfp);
-}
-
-static inline void *devm_kzalloc(struct udevice *dev, size_t size, gfp_t gfp)
-{
- return kzalloc(size, gfp);
-}
-
-static inline void *devm_kmaloc_array(struct udevice *dev,
- size_t n, size_t size, gfp_t flags)
-{
- /* TODO: add kmalloc_array() to linux/compat.h */
- if (size != 0 && n > SIZE_MAX / size)
- return NULL;
- return kmalloc(n * size, flags);
-}
-
-static inline void *devm_kcalloc(struct udevice *dev,
- size_t n, size_t size, gfp_t flags)
-{
- /* TODO: add kcalloc() to linux/compat.h */
- return kmalloc(n * size, flags | __GFP_ZERO);
-}
-
-static inline void devm_kfree(struct udevice *dev, void *ptr)
-{
- kfree(ptr);
-}
-
-#endif /* ! CONFIG_DEVRES */
+int dm_scan_fdt_dev(struct udevice *dev);
/*
* REVISIT:
projects / oweals / u-boot.git / blobdiff