Enable this feature so that we can use it for testing in sandbox_spl.

Signed-off-by: Simon Glass <sjg@chromium.org>

This driver should not be used in SPL since we do not have I2C support
enabled in SPL on sandbox.

Signed-off-by: Simon Glass <sjg@chromium.org>

Devices which use of-platdata have their own platdata. However, in many
cases the driver will have its own auto-alloced platdata, for use with the
device tree. The ofdata_to_platdata() method converts the device tree
settings to platdata.

With of-platdata we would not normally allocate the platdata since it is
provided by the U_BOOT_DEVICE() declaration. However this is inconvenient
since the of-platdata struct is closely tied to the device tree properties.
It is unlikely to exactly match the platdata needed by the driver.

In fact a useful approach is to declare platdata in the driver like this:

struct r3288_mmc_platdata {
	struct dtd_rockchip_rk3288_dw_mshc of_platdata;
	/* the 'normal' fields go here */
};

In this case we have dt_platadata available, but the normal fields are not
present, since ofdata_to_platdata() is never called. In fact driver model
doesn't allocate any space for the 'normal' fields, since it sees that there
is already platform data attached to the device.

To make this easier, adjust driver model to allocate the full size of the
struct (i.e. platdata_auto_alloc_size from the driver) and copy in the
of-platdata. This means that when the driver's bind() method is called,
the of-platdata will be present, followed by zero bytes for the empty
'normal field' portion.

A new DM_FLAG_OF_PLATDATA flag is available that indicates that the platdata
came from of-platdata. When the allocation/copy happens, the
DM_FLAG_ALLOC_PDATA flag will be set as well. The dtoc tool is updated to
output the platdata_size field, since U-Boot has no other way of knowing
the size of the of-platdata struct.

Signed-off-by: Simon Glass <sjg@chromium.org>

When of-platdata is used in SPL we don't use the device tree. So there is no
point in attaching it. Adjust the Makefile to skip attaching the device tree
when of-platdata is enabled.

Signed-off-by: Simon Glass <sjg@chromium.org>

This property is not useful for of-platdata, so omit it.

Signed-off-by: Simon Glass <sjg@chromium.org>

This is a flag. Adjust the name to be consistent with the other flags.

Signed-off-by: Simon Glass <sjg@chromium.org>

When CONFIG_OF_PLATDATA is enabled, we cannot use the u-boot,dm-pre-reloc
device tree property since the device tree is not available. However,
dt-platdata.c only includes devices which would have been present in the
device tree, and we can assume that all such devices are needed for SPL.
If they were not needed, they would have been omitted to save space.

So in this case, bind all devices regardless of the u-boot,dm-pre-reloc
setting. This avoids needing to add a DM_FLAG_PRE_RELOC to every driver,
thus affecting U-Boot proper also.

Signed-off-by: Simon Glass <sjg@chromium.org>

At present assert() is not supported with tiny-printf, so when DEBUG is
enabled a build error is generated for each assert().

Add an __assert_fail() function to correct this. It prints a message and
then hangs.

Signed-off-by: Simon Glass <sjg@chromium.org>

When swig is not available, we can still build correctly. So make this
optional. Add a comment about how to enable this build.

Signed-off-by: Simon Glass <sjg@chromium.org>

Add a Python version of the libfdt library which contains enough features to
support the dtoc tool. This is only a very bare-bones implementation. It
requires the 'swig' to build.

Signed-off-by: Simon Glass <sjg@chromium.org>

Update the Makefile to call dtoc to create the C header and source files,
then build these into the image.

Signed-off-by: Simon Glass <sjg@chromium.org>

This tool can produce C struct definitions and C platform data tables.
This is used to support the of-platdata feature.

Signed-off-by: Simon Glass <sjg@chromium.org>

This Python library provides a way to access the contents of the device
tree. It uses fdtget, so is inefficient for larger device tree files.

Signed-off-by: Simon Glass <sjg@chromium.org>

Add documentation on how this works, including the benefits and drawbacks.

Signed-off-by: Simon Glass <sjg@chromium.org>

Add a Kconfig option to enable this feature.

Signed-off-by: Simon Glass <sjg@chromium.org>

We cannot access the device tree in this case, so avoid compiling in the
various device-tree helper functions.

Signed-off-by: Simon Glass <sjg@chromium.org>

When this feature is enabled, we cannot access the device tree to find out
which serial device to use. Just use the first serial driver we find.

Signed-off-by: Simon Glass <sjg@chromium.org>

Add support for this feature in the core clock code.

Signed-off-by: Simon Glass <sjg@chromium.org>

This header can be included from anywhere, but will only pull in the
of-platdata struct definitions when this feature is enabled (and only in
SPL).

Signed-off-by: Simon Glass <sjg@chromium.org>

Add a driver which uses of-platdata to obtain its platform data. This can
be used to test the feature in sandbox. It displays the contents of its
platform data.

Signed-off-by: Simon Glass <sjg@chromium.org>

Provide a new function which can cope with obtaining information from
of-platdata instead of the device tree.

Signed-off-by: Simon Glass <sjg@chromium.org>

Add a placeholder for now so that this code will compile. It currently does
nothing.

Signed-off-by: Simon Glass <sjg@chromium.org>

When CONFIG_SPL_OF_PLATDATA is enabled we should not access the device
tree. Remove all references to this in the core driver-model code.

Signed-off-by: Simon Glass <sjg@chromium.org>

Since SPL needs the of-platdata structures, build these before starting
to build any SPL components.

Signed-off-by: Simon Glass <sjg@chromium.org>

When this feature is enabled, we should not access the device tree.

Signed-off-by: Simon Glass <sjg@chromium.org>

Start up the test devices. These print out of-platdata contents, providing a
check that the of-platdata feature is working correctly.

The device-tree changes are made to sandbox.dts rather than test.dts. since
the former controls the of-platdata generation.

Signed-off-by: Simon Glass <sjg@chromium.org>

It is useful to be able to build SPL for sandbox. It provides additional
build coverage and allows SPL features to be tested in sandbox. However
it does not need worthwhile to always create an SPL build. It nearly
doubles the build time and the feature is (so far) seldom used.

So for now, create a separate build target for sandbox SPL. This allows
experimentation with this new feature without impacting existing workflows.

Signed-off-by: Simon Glass <sjg@chromium.org>

SPL does not support an LCD display so there is no need to sync the video
when there is serial output.

Signed-off-by: Simon Glass <sjg@chromium.org>

These functions are not supported in SPL, so drop them.

Signed-off-by: Simon Glass <sjg@chromium.org>

Add an sandbox implementation for the generic SPL framework. This supports
locating and running U-Boot proper.

Signed-off-by: Simon Glass <sjg@chromium.org>

SPL does not have a command interface so we should not include the main loop
code.

Signed-off-by: Simon Glass <sjg@chromium.org>

PCI is not supported in SPL for sandbox, so avoid using it.

Signed-off-by: Simon Glass <sjg@chromium.org>

These headers are needed in case they are not transitively included.

Signed-off-by: Simon Glass <sjg@chromium.org>

The dm/ file should go at the end. Move it.

Signed-off-by: Simon Glass <sjg@chromium.org>

When building an SPL image, override the link flags so that it uses the
system libraries. This is similar to the way the non-SPL image is built.

Signed-off-by: Simon Glass <sjg@chromium.org>

SPL is expected to load and run U-Boot. This needs to work with sandbox also.
Provide a function to locate the U-Boot image, and another to start it. This
allows SPL to function on sandbox as it does on other archs.

Signed-off-by: Simon Glass <sjg@chromium.org>

Overriding the final link rule is possible with U-Boot proper. It us used to
create a sandbox image links with host libraries. To build a sandbox SPL
image we need the same feature for SPL.

To support this, update the SPL link rule so sandbox can override it.

Signed-off-by: Simon Glass <sjg@chromium.org>

This file does not appear to use I2C, so drop this include.

Signed-off-by: Simon Glass <sjg@chromium.org>

This option is now widely available, so remove the comment that it is only
available on ARM and sandbox.

Signed-off-by: Simon Glass <sjg@chromium.org>

Sandbox includes this code to provide build coverage. While we retain this
feature we should have sandbox build it. Sandbox does not in fact use the
I2C compatibility mode. Showing a warning for sandbox is just confusing,
since no conversion is expected.

Drop the warning for sandbox.

Signed-off-by: Simon Glass <sjg@chromium.org>