dm: Add base driver model support

Add driver model functionality for generic board.

This includes data structures and base code for registering devices and
uclasses (groups of devices with the same purpose, e.g. all I2C ports will
be in the same uclass).

The feature is enabled with CONFIG_DM.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Pavel Herrmann <morpheus.ibis@gmail.com>
Signed-off-by: Viktor Křivák <viktor.krivak@gmail.com>
Signed-off-by: Tomas Hlavacek <tmshlvck@gmail.com>

1 files changed, 87 insertions, 0 deletions

diff --git a/include/dm/device-internal.h b/include/dm/device-internal.h
new file mode 100644
index 00000000000..c026e8e49c7
--- /dev/null
+++ b/include/dm/device-internal.h
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2013 Google, Inc
+ *
+ * (C) Copyright 2012
+ * Pavel Herrmann <morpheus.ibis@gmail.com>
+ * Marek Vasut <marex@denx.de>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _DM_DEVICE_INTERNAL_H
+#define _DM_DEVICE_INTERNAL_H
+
+struct device;
+
+/**
+ * device_bind() - Create a device and bind it to a driver
+ *
+ * Called to set up a new device attached to a driver. The device will either
+ * have platdata, or a device tree node which can be used to create the
+ * platdata.
+ *
+ * Once bound a device exists but is not yet active until device_probe() is
+ * called.
+ *
+ * @parent: Pointer to device's parent, under which this driver will exist
+ * @drv: Device's driver
+ * @name: Name of device (e.g. device tree node name)
+ * @platdata: Pointer to data for this device - the structure is device-
+ * specific but may include the device's I/O address, etc.. This is NULL for
+ * devices which use device tree.
+ * @of_offset: Offset of device tree node for this device. This is -1 for
+ * devices which don't use device tree.
+ * @devp: Returns a pointer to the bound device
+ * @return 0 if OK, -ve on error
+ */
+int device_bind(struct device *parent, struct driver *drv,
+		const char *name, void *platdata, int of_offset,
+		struct device **devp);
+
+/**
+ * device_bind_by_name: Create a device and bind it to a driver
+ *
+ * This is a helper function used to bind devices which do not use device
+ * tree.
+ *
+ * @parent: Pointer to device's parent
+ * @info: Name and platdata for this device
+ * @devp: Returns a pointer to the bound device
+ * @return 0 if OK, -ve on error
+ */
+int device_bind_by_name(struct device *parent, const struct driver_info *info,
+			struct device **devp);
+
+/**
+ * device_probe() - Probe a device, activating it
+ *
+ * Activate a device so that it is ready for use. All its parents are probed
+ * first.
+ *
+ * @dev: Pointer to device to probe
+ * @return 0 if OK, -ve on error
+ */
+int device_probe(struct device *dev);
+
+/**
+ * device_remove() - Remove a device, de-activating it
+ *
+ * De-activate a device so that it is no longer ready for use. All its
+ * children are deactivated first.
+ *
+ * @dev: Pointer to device to remove
+ * @return 0 if OK, -ve on error (an error here is normally a very bad thing)
+ */
+int device_remove(struct device *dev);
+
+/**
+ * device_unbind() - Unbind a device, destroying it
+ *
+ * Unbind a device and remove all memory used by it
+ *
+ * @dev: Pointer to device to unbind
+ * @return 0 if OK, -ve on error
+ */
+int device_unbind(struct device *dev);
+
+#endif