u-boot.git/drivers/core/uclass.c, branch v2016.05

dm: core: Add uclass_first_device_err() to return a valid device

2016-03-14T21:34:50+00:00

A common pattern is to call uclass_first_device() and then check if it
actually returns a device. Add a new function which does this, returning
an error if there are no devices in that uclass.

Signed-off-by: Simon Glass

dm: core: Export uclass_find_device_by_of_offset()

2016-01-22T03:42:35+00:00

It is sometimes useful to be able to find a device before probing it,
perhaps to set up some platform data for it. Allow finding by of_offset
also.

Signed-off-by: Simon Glass

dm: core: Call uclass post_bind() after the driver's bind() method

2016-01-21T02:06:22+00:00

At present the uclass's post_bind() method is called before the driver's
bind() method. This means that the uclass cannot use any of the information
set up by the driver. Move it later in the sequence to permit this.

This is an ordering change which is always fairly major in nature. The main
impact is that devices which have children will not see them appear in their
bind() method. From what I can see, existing drivers do not look at their
children in the bind() method, so this should be safe.

Conceptually this change seems to result in a 'more correct' ordering, since
the uclass (which is broader than the device) gets the last word.

Signed-off-by: Simon Glass 
Reviewed-by: Tom Rini

dm: core: Provide uclass_find_device_by_phandle() only when needed

2016-01-21T02:06:21+00:00

This function cannot be used unless support is enabled for device tree
control. Adjust the code to reflect that.

Signed-off-by: Simon Glass

dm: core: Remove unnecessary codes in uclass_pre_remove_device()

2015-10-29T19:05:51+00:00

dev->uclass->uc_drv->per_device_auto_alloc_size is to be freed in
device_free(), so is dev->seq. Remove these unnecessary codes.

Signed-off-by: Bin Meng 
Acked-by: Simon Glass

dm: Improve handling of a missing uclass

2015-09-03T03:28:23+00:00

When a uclass definition is missing, no drivers in that uclass can operate.
This can happen if a board has a strange collection of options (e.g. the
driver is enabled but the uclass is not).

Unfortunately this is very confusing at present. Starting up driver model
results in a -ENOENT error, which is pretty generic. Quite a big of digging
is needed to get to the root cause.

To help with this, change the error to a very strange one with no other
users in U-Boot. Also add a debug message.

Signed-off-by: Simon Glass

dm: drop CONFIG_DM_DEVICE_REMOVE from uncmd list

2015-08-18T17:46:04+00:00

We do not want to compile the DM remove code for SPL.  Currently,
we undef it in include/config_uncmd_spl.h (for C files) and in
scripts/Makefile.uncmd_spl (for Makefiles).  This is really ugly.

This commit demonstrates how we can deprecate those two files.

Use $(SPL_) for the entry in the Makfile and CONFIG_IS_ENABLED()
in C files.

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

dm: core: Support finding a device by phandle

2015-08-06T02:57:51+00:00

It is common for one node to reference another via a phandle. Add support
for obtaining an attached device by this method. As an example, a node may
have a 'power-supply' property which references a regulator, allowing the
driver to turn on its power.

Signed-off-by: Simon Glass

dm: core: Check for empty list in uclass_find_device()

2015-08-05T14:42:40+00:00

This function needs to check the list has entries before traversing it.
Fix this bug.

Signed-off-by: Simon Glass 
Reviewed-by: Bin Meng

dm: change dm_warn() message into debug() in uclass_add()

2015-07-21T23:39:34+00:00

The command "dm uclass" tries to display all the UClasses, but
some of them might be disabled by Kconfig.

The function do_dm_dump_uclass() iterates over all the UClass IDs
and calls uclass_get() for each of them.  Then, it displays annoying
message "Cannot find uclass for id ..." every time it fails to get
the UClass.

As a result, we get much noisier log for the "dm uclass" command.

  => dm uclass
  uclass 0: root
  - * root_driver @ bfb54028, seq 0, (req -1)

  Cannot find uclass for id 1: please add the UCLASS_DRIVER() ...
  Cannot find uclass for id 2: please add the UCLASS_DRIVER() ...
  Cannot find uclass for id 3: please add the UCLASS_DRIVER() ...
  Cannot find uclass for id 4: please add the UCLASS_DRIVER() ...
  Cannot find uclass for id 5: please add the UCLASS_DRIVER() ...
  Cannot find uclass for id 6: please add the UCLASS_DRIVER() ...

This commit suppresses these warnings.

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