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

dm: introduce dev_get_addr interface

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

Abstracting dev_get_addr can improve drivers that want to
get device's address.

Signed-off-by: Peng Fan 
Acked-by: Igor Grinberg 
Acked-by: Simon Glass

dm: core: Allow uclass to set up a device's child before it is probed

2015-01-30T00:09:56+00:00

Some buses need to set up their devices before they can be used. This setup
may well be common to all buses in a particular uclass. Support a common
pre-probe method for the uclass, called before any bus devices are probed.

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

dm: core: Allow uclasses to specify private data for a device's children

2015-01-30T00:09:55+00:00

In many cases the per-child private data for a device's children is defined
by the uclass rather than the individual driver. For example, a SPI bus
needs to store information about each of its children, but all SPI drivers
store the same information. It makes sense to allow the uclass to define
this data.

If the driver provides a size value for its per-child private data, then use
it. Failng that, fall back to that provided by the uclass.

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

dm: core: Add a flag to control sequence numbering

2015-01-30T00:09:55+00:00

At present we try to use the 'reg' property and device tree aliases to give
devices a sequence number. The 'reg' property is often actually a memory
address, so the sequence numbers thus-obtained are not useful. It would be
better if the devices were just sequentially numbered in that case. In fact
neither I2C nor SPI use this feature, so drop it.

Some devices need us to look up an alias to number them within the uclass.
Add a flag to control this, so it is not done unless it is needed.

Adjust the tests to test this new behaviour.

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

dm: core: Add a function to get a device's uclass ID

2015-01-30T00:09:55+00:00

This is useful to check which uclass a device is in.

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

dm: core: Add a post_bind method for parents

2015-01-30T00:09:55+00:00

Allow parent drivers to be called when a new child is bound to them. This
allows a bus to set up information it needs for that child.

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

dm: core: Allow uclasses to specify platdata for a device's children

2015-01-30T00:09:55+00:00

In many cases the child platform data for a device's children is defined by
the uclass rather than the individual devices. For example, a SPI bus needs
to know the chip select and speed for each of its children. It makes sense
to allow this information to be defined the SPI uclass rather than each
individual driver.

If the device provides a size value for its child platdata, then use it.
Failng that, fall back to that provided by the uclass.

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

dm: core: Allow parents to have platform data for their children

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

For buses it is common for parents to need to know the address of the child
on the bus, the bus speed to use for that child, and other information. This
can be provided in platform data attached to each child.

Add driver model support for this, including auto-allocation which can be
requested using a new property to specify the size of the data.

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

dm: core: Allocate platform data when binding a device

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

When using allocated platform data, allocate it when we bind the device.
This makes it possible to fill in this information before the device is
probed.

This fits with the platform data model (when not using device tree),
since platform data exists at bind-time.

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

dm: core: Tidy up error handling in device_bind()

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

Make the error handling more standard to make it easier to build on top of
it. Also correct a bug in the error path where there is no parent.

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