u-boot.git/doc/develop/driver-model, branch v2022.10

doc: dm: clarify activation.

2022-08-20T06:38:12+00:00

Explain when devices should get activated.

Signed-off-by: Michal Suchanek 
Reviewed-by: Simon Glass 
Reviewed-by: Heinrich Schuchardt

dm: core: Prepare for updating the device tree with ofnode

2022-08-12T12:14:24+00:00

Add some documentation and a new flag so that we can safely enabled using
the ofnode interface to write to the device tree.

Signed-off-by: Simon Glass

dm: core: Introduce support for multiple trees

2022-08-12T12:14:23+00:00

At present ofnode only works with a single device tree, for the most part.
This is the control FDT used by U-Boot.

When booting an OS we may obtain a different device tree and want to
modify it. Add some initial support for this into the ofnode API.

Note that we don't permit aliases in this other device tree, since the
of_access implementation maintains a list of aliases collected at
start-up. Also, we don't need aliases to do fixups in the other FDT. So
make sure that flat tree and live tree processing are consistent in this
area.

Signed-off-by: Simon Glass

dm: core: Add a note about how livetree updates work

2022-08-12T12:14:23+00:00

The unflattening algorithm results in a single block of memory being
allocated for the whole tree. When writing new properties, these are
allocated new memory outside that block. When the block is freed, the
allocated properties remain.

Document how this works and the potential memory leak, as well as
mentioning that updating the livetree is actually supported now.

Signed-off-by: Simon Glass

arm: Remove PXA architecture support

2022-07-07T13:29:08+00:00

With the last platform for this architecture removed, remove the rest of
the architecture support as well.

Cc: Marek Vasut 
Signed-off-by: Tom Rini 
Reviewed-by: Simon Glass

linker_lists: Rename sections to remove . prefix

2022-06-23T16:58:18+00:00

Rename the sections used to implement linker lists so they begin with
'__u_boot_list' rather than '.u_boot_list'. The double underscore at the
start is still distinct from the single underscore used by the symbol
names.

Having a '.' in the section names conflicts with clang's ASAN
instrumentation which tries to add redzones between the linker list
elements, causing expected accesses to fail. However, clang doesn't try
to add redzones to user sections, which are names with all alphanumeric
and underscore characters.

Signed-off-by: Andrew Scull 
Reviewed-by: Simon Glass

Convert CONFIG_SPL_SYS_MALLOC_SIMPLE to Kconfig

2022-06-06T16:09:12+00:00

This converts the following to Kconfig:
   CONFIG_SPL_SYS_MALLOC_SIMPLE

The problem here is that a few platforms have been doing:
#ifdef CONFIG_SPL_BUILD
#define CONFIG_SYS_MALLOC_SIMPLE
#endif

instead of defining CONFIG_SPL_SYS_MALLOC_SIMPLE directly.  Correct this
and update the documentation in a few places to match usage.

Signed-off-by: Tom Rini

dm: tag: add some document

2022-04-23T20:05:34+00:00

Some basic stuff about tag support is explained under
doc/devlop/driver-model.

Signed-off-by: AKASHI Takahiro 
Reviewed-by: Simon Glass

dm: Add docs to explain how to enable DM_SERIAL for a board

2022-04-09T19:06:31+00:00

This is an attempt to cover the common cases found when enabling driver
model for serial on a new board.

Signed-off-by: Simon Glass 
Reviewed-by: Fabio Estevam 
Signed-off-by: Heinrich Schuchardt

nvme: Split out PCI support

2022-02-10T21:44:23+00:00

Apple SoCs have an integrated NVMe controller that isn't connected
over a PCIe bus. In preparation for adding support for this NVMe
controller, split out the PCI support into its own file. This file
is selected through a new CONFIG_NVME_PCI Kconfig option, so do
a wholesale replacement of CONFIG_NVME with CONFIG_NVME_PCI.

Signed-off-by: Mark Kettenis 
Reviewed-by: Simon Glass 
Tested on: Macbook Air M1
Tested-by: Simon Glass