u-boot.git/include/dm/root.h, branch v2016.05

dm: Add dm_scan_other() to locate board-specific devices

2014-07-23T13:08:37+00:00

Some boards will have devices which are not in the device tree and do not
have platform data. They may be programnatically created, for example.
Add a hook which boards can use to bind those devices early in boot.

Signed-off-by: Simon Glass

dm: Provide a function to scan child FDT nodes

2014-07-23T13:08:36+00:00

At present only root nodes in the device tree are scanned for devices.
But some devices can have children. For example a SPI bus may have
several children for each of its chip selects.

Add a function which scans subnodes and binds devices for each one. This
can be used for the root node scan also, so change it.

A device can call this function in its bind() or probe() methods to bind
its children.

Signed-off-by: Simon Glass

dm: Tidy up some header file comments

2014-07-23T13:07:26+00:00

Fix up the style of a few comments and add/clarify a few others.

Signed-off-by: Simon Glass

dm: Support driver model prior to relocation

2014-07-23T13:07:24+00:00

Initialise devices marked 'pre-reloc' and make them available prior to
relocation. Note that this requires pre-reloc malloc() to be available.

Signed-off-by: Simon Glass

dm: Allow drivers to be marked 'before relocation'

2014-07-23T13:07:24+00:00

Driver model currently only operates after relocation is complete. In this
state U-Boot typically has a small amount of memory available. In adding
support for driver model prior to relocation we must try to use as little
memory as possible.

In addition, on some machines the memory has not be inited and/or the CPU
is not running at full speed or the data cache is off. These can reduce
execution performance, so the less initialisation that is done before
relocation the better.

An immediately-obvious improvement is to only initialise drivers which are
actually going to be used before relocation. On many boards the only such
driver is a serial UART, so this provides a very large potential benefit.

Allow drivers to mark themselves as 'pre-reloc' which means that they will
be initialised prior to relocation. This can be done either with a driver
flag or with a 'dm,pre-reloc' device tree property.

To support this, the various dm scanning function now take a 'pre_reloc_only'
parameter which indicates that only drivers marked pre-reloc should be
bound.

Signed-off-by: Simon Glass

dm: Provide a way to shut down driver model

2014-07-23T13:07:24+00:00

Add a new method which removes and unbinds all drivers.

Signed-off-by: Simon Glass 
Acked-by: Marek Vasut

dm: Tidy up four minor code nits

2014-06-20T17:56:50+00:00

There is a spelling mistake and two functions are missing comments
altogether. Also the flags declaration is correct, but doesn't follow
style. Finally, the uclass_get_device() function has some errors in
its documentation.

Fix these problems.

Signed-off-by: Simon Glass 
Acked-by: Marek Vasut

dm: rename device struct to udevice

2014-05-27T14:21:32+00:00

using UBI and DM together leads in compiler error, as
both define a "struct device", so rename "struct device"
in include/dm/device.h to "struct udevice", as we use
linux code (MTD/UBI/UBIFS some USB code,...) and cannot
change the linux "struct device"

Signed-off-by: Heiko Schocher 
Cc: Simon Glass 
Cc: Marek Vasut

dm: Add base driver model support

2014-03-04T17:15:29+00:00

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 
Signed-off-by: Marek Vasut 
Signed-off-by: Pavel Herrmann 
Signed-off-by: Viktor Křivák 
Signed-off-by: Tomas Hlavacek