u-boot.git/drivers/core/root.c, branch v2015.04

dm: Add support for all targets which requires MANUAL_RELOC

2015-02-12T22:17:29+00:00

Targets with CONFIG_NEEDS_MANUAL_RELOC do not use REL/RELA
relocation (mostly only GOT) where functions aray are not
updated. This patch is fixing function pointers for DM core
and serial-uclass to ensure that relocated functions are called.

Signed-off-by: Michal Simek 
Acked-by: Simon Glass

dm: core: Ignore disabled devices when binding

2015-01-30T00:09:57+00:00

We don't want to bind devices which should never be used.

Signed-off-by: Simon Glass 
Reviewed-by: Masahiro Yamada

dm: core: Set device tree node for root device

2015-01-30T00:09:54+00:00

The root device corresponds to the root device tree node, so set this up.
Also add a few notes to the documentation.

Signed-off-by: Simon Glass

dm: core: a trivial clean up

2014-11-22T09:16:48+00:00

Signed-off-by: Masahiro Yamada 
Acked-by: Simon Glass

dm: Adjust lists_bind_fdt() to return the bound device

2014-09-10T18:59:59+00:00

Allow the caller to find out the device that was bound in response to this
call.

Signed-off-by: Simon Glass

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: 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