Merge branch 'next'

1 files changed, 93 insertions, 0 deletions

diff --git a/include/dm/device-internal.h b/include/dm/device-internal.h
index 39406c3f35..e6b71cbfd2 100644
--- a/include/dm/device-internal.h
+++ b/include/dm/device-internal.h
@@ -10,11 +10,86 @@
 #ifndef _DM_DEVICE_INTERNAL_H
 #define _DM_DEVICE_INTERNAL_H
 
+#include <linker_lists.h>
 #include <dm/ofnode.h>
 
 struct device_node;
 struct udevice;
 
+/*
+ * These two macros DM_DEVICE_INST and DM_DEVICE_REF are only allowed in code
+ * generated by dtoc, because the ordering is important and if other instances
+ * creep in then they may mess up the ordering expected by dtoc.
+ *
+ * It is OK to use them with 'extern' though, since that does not actually
+ * add a new record to the linker_list.
+ */
+
+/**
+ * DM_DEVICE_INST() - Declare a bound device ready for run-time use
+ *
+ * This adds an actual struct udevice to a list which is found by driver model
+ * on start-up.
+ *
+ * For example:
+ *
+ * extern U_BOOT_DRIVER(sandbox_fixed_clock);
+ * extern DM_UCLASS_INST(clk);
+ *
+ * DM_DEVICE_INST(clk_fixed) = {
+ *	.driver		= DM_DRIVER_REF(sandbox_fixed_clock),
+ *	.name		= "sandbox_fixed_clock",
+ *	.plat_		= &_sandbox_fixed_clock_plat_clk_fixed,
+ *	.uclass		= DM_UCLASS_REF(clk),
+ *	...
+ *	.seq_		= 0,
+ * };
+ *
+ * @_name: Name of the udevice. This must be a valid C identifier, used by the
+ *	linker_list.
+ */
+#define DM_DEVICE_INST(_name)						\
+	ll_entry_declare(struct udevice, _name, udevice)
+
+/**
+ * DM_DEVICE_REF() - Get a reference to a device
+ *
+ * This is useful in data structures and code for referencing a udevice at
+ * build time. Before this is used, an extern DM_DEVICE_INST() must have been
+ * declared.
+ *
+ * For example:
+ *
+ * extern DM_DEVICE_INST(clk_fixed);
+ *
+ * struct udevice *devs[] = {
+ *	DM_DEVICE_REF(clk_fixed),
+ * };
+ *
+ * @_name: Name of the udevice. This must be a valid C identifier, used by the
+ *	linker_list
+ * @returns struct udevice * for the device
+ */
+#define DM_DEVICE_REF(_name)						\
+	ll_entry_ref(struct udevice, _name, udevice)
+
+/**
+ * DM_DEVICE_GET() - Get a pointer to a given device
+ *
+ * This is similar to DM_DEVICE_REF() except that it does not need the extern
+ * declaration before it. However it cannot be used in a data structures, only
+ * in code within a function.
+ *
+ * For example:
+ *
+ * void some_function() {
+ *	struct udevice *dev = DM_DEVICE_GET(clk_fixed);
+ * ...
+ * }
+ */
+#define DM_DEVICE_GET(__name)						\
+	ll_entry_get(struct udevice, __name, udevice)
+
 /**
  * device_bind() - Create a device and bind it to a driver
  *
@@ -209,6 +284,9 @@ static inline int device_chld_remove(struct udevice *dev, struct driver *drv,
  * Use this function to override normal operation for special situations, such
  * as needing to allocate a variable amount of data.
  *
+ * If OF_PLATDATA_RT is enabled, this function cannot be used out of core driver
+ * model code, since the pointer must be within the gd->dm_priv_base region.
+ *
  * @dev		Device to check
  * @priv	New private-data pointer
  */
@@ -223,6 +301,9 @@ void dev_set_priv(struct udevice *dev, void *priv);
  * Use this function to override normal operation for special situations, such
  * as needing to allocate a variable amount of data.
  *
+ * If OF_PLATDATA_RT is enabled, this function cannot be used out of core driver
+ * model code, since the pointer must be within the gd->dm_priv_base region.
+ *
  * @dev:	Device to update
  * @parent_priv: New parent-private data
  */
@@ -237,6 +318,9 @@ void dev_set_parent_priv(struct udevice *dev, void *parent_priv);
  * Use this function to override normal operation for special situations, such
  * as needing to allocate a variable amount of data.
  *
+ * If OF_PLATDATA_RT is enabled, this function cannot be used out of core driver
+ * model code, since the pointer must be within the gd->dm_priv_base region.
+ *
  * @dev:	Device to update
  * @uclass_priv: New uclass private data
  */
@@ -251,6 +335,9 @@ void dev_set_uclass_priv(struct udevice *dev, void *uclass_priv);
  * Use this function to override normal operation for special situations, such
  * as needing to allocate a variable amount of data.
  *
+ * If OF_PLATDATA_RT is enabled, this function cannot be used out of core driver
+ * model code, since the pointer must be within the gd->dm_priv_base region.
+ *
  * @dev		Device to check
  * @plat	New platform-data pointer
  */
@@ -265,6 +352,9 @@ void dev_set_plat(struct udevice *dev, void *priv);
  * Use this function to override normal operation for special situations, such
  * as needing to allocate a variable amount of data.
  *
+ * If OF_PLATDATA_RT is enabled, this function cannot be used out of core driver
+ * model code, since the pointer must be within the gd->dm_priv_base region.
+ *
  * @dev:	Device to update
  * @parent_plat: New parent platform data
  */
@@ -279,6 +369,9 @@ void dev_set_parent_plat(struct udevice *dev, void *parent_plat);
  * Use this function to override normal operation for special situations, such
  * as needing to allocate a variable amount of data.
  *
+ * If OF_PLATDATA_RT is enabled, this function cannot be used out of core driver
+ * model code, since the pointer must be within the gd->dm_priv_base region.
+ *
  * @dev:	Device to update
  * @uclass_plat: New uclass platform data
  */