X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=include%2Fdm%2Fdevice.h;h=1cf81501ed92c31f5a85e2b5582375318fe7abae;hb=8a36287a019f5d7532a8a1a7da6aa96e490dbb8a;hp=e09f8978821e3cb35fc19a6a1507f964d3b9edad;hpb=9a79f6e6d51f35eca9fff34dd5e4689dfd2c59a8;p=oweals%2Fu-boot.git

diff --git a/include/dm/device.h b/include/dm/device.h
index e09f897882..1cf81501ed 100644
--- a/include/dm/device.h
+++ b/include/dm/device.h
@@ -21,13 +21,13 @@
 struct driver_info;
 
 /* Driver is active (probed). Cleared when it is removed */
-#define DM_FLAG_ACTIVATED	(1 << 0)
+#define DM_FLAG_ACTIVATED		(1 << 0)
 
 /* DM is responsible for allocating and freeing platdata */
-#define DM_FLAG_ALLOC_PDATA	(1 << 1)
+#define DM_FLAG_ALLOC_PDATA		(1 << 1)
 
 /* DM should init this device prior to relocation */
-#define DM_FLAG_PRE_RELOC	(1 << 2)
+#define DM_FLAG_PRE_RELOC		(1 << 2)
 
 /* DM is responsible for allocating and freeing parent_platdata */
 #define DM_FLAG_ALLOC_PARENT_PDATA	(1 << 3)
@@ -36,10 +36,10 @@ struct driver_info;
 #define DM_FLAG_ALLOC_UCLASS_PDATA	(1 << 4)
 
 /* Allocate driver private data on a DMA boundary */
-#define DM_FLAG_ALLOC_PRIV_DMA	(1 << 5)
+#define DM_FLAG_ALLOC_PRIV_DMA		(1 << 5)
 
 /* Device is bound */
-#define DM_FLAG_BOUND	(1 << 6)
+#define DM_FLAG_BOUND			(1 << 6)
 
 /**
  * struct udevice - An instance of a driver
@@ -78,6 +78,10 @@ struct driver_info;
  * @req_seq: Requested sequence number for this device (-1 = any)
  * @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.
+ * @devres_head: List of memory allocations associated with this device.
+ *		When CONFIG_DEVRES is enabled, devm_kmalloc() and friends will
+ *		add to this list. Memory so-allocated will be freed
+ *		automatically when the device is removed / unbound
  */
 struct udevice {
 	const struct driver *driver;
@@ -166,10 +170,6 @@ struct udevice_id {
  * @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.
@@ -278,13 +278,26 @@ struct udevice *dev_get_parent(struct udevice *child);
  * dev_get_driver_data() - get the driver 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
+ * particular compatible string in struct udevice_id. This function
  * returns the associated data value for that compatible string. This is
  * the 'data' field in struct udevice_id.
  *
+ * As an example, consider this structure:
+ * static const struct udevice_id tegra_i2c_ids[] = {
+ *	{ .compatible = "nvidia,tegra114-i2c", .data = TYPE_114 },
+ *	{ .compatible = "nvidia,tegra20-i2c", .data = TYPE_STD },
+ *	{ .compatible = "nvidia,tegra20-i2c-dvc", .data = TYPE_DVC },
+ *	{ }
+ * };
+ *
+ * When driver model finds a driver for this it will store the 'data' value
+ * corresponding to the compatible string it matches. This function returns
+ * that value. This allows the driver to handle several variants of a device.
+ *
  * For USB devices, this is the driver_info field in struct usb_device_id.
  *
  * @dev:	Device to check
+ * @return driver data (0 if none is provided)
  */
 ulong dev_get_driver_data(struct udevice *dev);
 
@@ -299,7 +312,7 @@ ulong dev_get_driver_data(struct udevice *dev);
  */
 const void *dev_get_driver_ops(struct udevice *dev);
 
-/*
+/**
  * device_get_uclass_id() - return the uclass ID of a device
  *
  * @dev:	Device to check
@@ -307,7 +320,7 @@ const void *dev_get_driver_ops(struct udevice *dev);
  */
 enum uclass_id device_get_uclass_id(struct udevice *dev);
 
-/*
+/**
  * dev_get_uclass_name() - return the uclass name of a device
  *
  * This checks that dev is not NULL.
@@ -440,6 +453,17 @@ int device_find_next_child(struct udevice **devp);
  */
 fdt_addr_t dev_get_addr(struct udevice *dev);
 
+/**
+ * dev_get_addr_index() - Get the indexed reg property of a device
+ *
+ * @dev: Pointer to a device
+ * @index: the 'reg' property can hold a list of <addr, size> pairs
+ *	   and @index is used to select which one is required
+ *
+ * @return addr
+ */
+fdt_addr_t dev_get_addr_index(struct udevice *dev, int index);
+
 /**
  * device_has_children() - check if a device has any children
  *
@@ -496,6 +520,18 @@ static inline bool device_is_on_pci_bus(struct udevice *dev)
 	return device_get_uclass_id(dev->parent) == UCLASS_PCI;
 }
 
+/**
+ * device_foreach_child_safe() - iterate through child devices safely
+ *
+ * This allows the @pos child to be removed in the loop if required.
+ *
+ * @pos: struct udevice * for the current device
+ * @next: struct udevice * for the next device
+ * @parent: parent device to scan
+ */
+#define device_foreach_child_safe(pos, next, parent)	\
+	list_for_each_entry_safe(pos, next, &parent->child_head, sibling_node)
+
 /* 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);
@@ -512,7 +548,7 @@ void *_devres_alloc(dr_release_t release, size_t size, gfp_t gfp);
 #endif
 
 /**
- * devres_alloc - Allocate device resource data
+ * devres_alloc() - Allocate device resource data
  * @release: Release function devres will be associated with
  * @size: Allocation size
  * @gfp: Allocation flags
@@ -528,7 +564,7 @@ void *_devres_alloc(dr_release_t release, size_t size, gfp_t gfp);
 	_devres_alloc(release, size, gfp | __GFP_ZERO)
 
 /**
- * devres_free - Free device resource data
+ * devres_free() - Free device resource data
  * @res: Pointer to devres data to free
  *
  * Free devres created with devres_alloc().
@@ -536,7 +572,7 @@ void *_devres_alloc(dr_release_t release, size_t size, gfp_t gfp);
 void devres_free(void *res);
 
 /**
- * devres_add - Register device resource
+ * devres_add() - Register device resource
  * @dev: Device to add resource to
  * @res: Resource to register
  *
@@ -547,7 +583,7 @@ void devres_free(void *res);
 void devres_add(struct udevice *dev, void *res);
 
 /**
- * devres_find - Find device resource
+ * devres_find() - Find device resource
  * @dev: Device to lookup resource from
  * @release: Look for resources associated with this release function
  * @match: Match function (optional)
@@ -557,14 +593,13 @@ void devres_add(struct udevice *dev, void *res);
  * and for which @match returns 1.  If @match is NULL, it's considered
  * to match all.
  *
- * RETURNS:
- * Pointer to found devres, NULL if not found.
+ * @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
+ * 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)
@@ -574,14 +609,13 @@ void *devres_find(struct udevice *dev, dr_release_t release,
  * as @new_res and for which @match return 1.  If found, @new_res is
  * freed; otherwise, @new_res is added atomically.
  *
- * RETURNS:
- * Pointer to found or added devres.
+ * @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
+ * 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)
@@ -592,14 +626,13 @@ void *devres_get(struct udevice *dev, void *new_res,
  * match all.  If found, the resource is removed atomically and
  * returned.
  *
- * RETURNS:
- * Pointer to removed devres on success, NULL if not found.
+ * @return ointer to removed devres on success, NULL if not found.
  */
 void *devres_remove(struct udevice *dev, dr_release_t release,
 		    dr_match_t match, void *match_data);
 
 /**
- * devres_destroy - Find a device resource and destroy it
+ * 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)
@@ -613,14 +646,13 @@ void *devres_remove(struct udevice *dev, dr_release_t release,
  * only the devres-allocated data will be freed.  The caller becomes
  * responsible for freeing any other data.
  *
- * RETURNS:
- * 0 if devres is found and freed, -ENOENT if not found.
+ * @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
+ * 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)
@@ -631,15 +663,14 @@ int devres_destroy(struct udevice *dev, dr_release_t release,
  * match all.  If found, the resource is removed atomically, the
  * release function called and the resource freed.
  *
- * RETURNS:
- * 0 if devres is found and freed, -ENOENT if not found.
+ * @return 0 if devres is found and freed, -ENOENT if not found.
  */
 int devres_release(struct udevice *dev, dr_release_t release,
 		   dr_match_t match, void *match_data);
 
 /* managed devm_k.alloc/kfree for device drivers */
 /**
- * devm_kmalloc - Resource-managed kmalloc
+ * devm_kmalloc() - Resource-managed kmalloc
  * @dev: Device to allocate memory for
  * @size: Allocation size
  * @gfp: Allocation gfp flags
@@ -648,8 +679,7 @@ int devres_release(struct udevice *dev, dr_release_t release,
  * automatically freed on driver detach.  Like all other devres
  * resources, guaranteed alignment is unsigned long long.
  *
- * RETURNS:
- * Pointer to allocated memory on success, NULL on failure.
+ * @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)
@@ -670,13 +700,13 @@ static inline void *devm_kcalloc(struct udevice *dev,
 }
 
 /**
- * devm_kfree - Resource-managed kfree
+ * devm_kfree() - Resource-managed kfree
  * @dev: Device this memory belongs to
- * @p: Memory to free
+ * @ptr: Memory to free
  *
  * Free memory allocated with devm_kmalloc().
  */
-void devm_kfree(struct udevice *dev, void *p);
+void devm_kfree(struct udevice *dev, void *ptr);
 
 #else /* ! CONFIG_DEVRES */
 
@@ -750,11 +780,32 @@ static inline void *devm_kcalloc(struct udevice *dev,
 	return kmalloc(n * size, flags | __GFP_ZERO);
 }
 
-static inline void devm_kfree(struct udevice *dev, void *p)
+static inline void devm_kfree(struct udevice *dev, void *ptr)
 {
-	kfree(p);
+	kfree(ptr);
 }
 
 #endif /* ! CONFIG_DEVRES */
 
+/**
+ * dm_set_translation_offset() - Set translation offset
+ * @offs: Translation offset
+ *
+ * Some platforms need a special address translation. Those
+ * platforms (e.g. mvebu in SPL) can configure a translation
+ * offset in the DM by calling this function. It will be
+ * added to all addresses returned in dev_get_addr().
+ */
+void dm_set_translation_offset(fdt_addr_t offs);
+
+/**
+ * dm_get_translation_offset() - Get translation offset
+ *
+ * This function returns the translation offset that can
+ * be configured by calling dm_set_translation_offset().
+ *
+ * @return translation offset for the device address (0 as default).
+ */
+fdt_addr_t dm_get_translation_offset(void);
+
 #endif