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Explain when devices should get activated.
Signed-off-by: Michal Suchanek <msuchanek@suse.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
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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 <sjg@chromium.org>
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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 <sjg@chromium.org>
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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 <sjg@chromium.org>
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With the last platform for this architecture removed, remove the rest of
the architecture support as well.
Cc: Marek Vasut <marex@denx.de>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
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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 <ascull@google.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
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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 <trini@konsulko.com>
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Some basic stuff about tag support is explained under
doc/devlop/driver-model.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
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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 <sjg@chromium.org>
Reviewed-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
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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 <kettenis@openbsd.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested on: Macbook Air M1
Tested-by: Simon Glass <sjg@chromium.org>
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This probably should have been done a while back since it is a core
system. Very few boards remain to be migrated.
Addd a migration deadline for a year out.
Signed-off-by: Simon Glass <sjg@chromium.org>
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Some boards still use the old timer mechanism. Set a deadline for them to
update to driver model. Point to some examples as well.
This needs a bit of a strange rule to avoid an error on some boards.
Signed-off-by: Simon Glass <sjg@chromium.org>
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A few boards still use the old keyboard mechanism. Set a deadline for them
to update to driver model.
Signed-off-by: Simon Glass <sjg@chromium.org>
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This error can be confusing so mention it specifically in the
documentation.
Signed-off-by: Simon Glass <sjg@chromium.org>
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Convert some of these occurences to C code, where it is easy to do. This
should help encourage this approach to be used in new code.
Signed-off-by: Simon Glass <sjg@chromium.org>
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Now that we have a 'positive' Kconfig option, use this instead of the
negative one, which is harder to understand.
Signed-off-by: Simon Glass <sjg@chromium.org>
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Split this information into subsections and expand it.
Signed-off-by: Simon Glass <sjg@chromium.org>
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Migration is complete. Drop the message.
Signed-off-by: Simon Glass <sjg@chromium.org>
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When things go wrong it can be confusing to figure out what to change.
Add a few more details to the documentation.
Fix a 'make htmldocs' warning while we are here.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Walter Lozano <walter.lozano@collabora.com>
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This converts the existing README.nvme to reST, and puts it under
the develop/driver-model/ directory.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
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This converts the existing README.virtio to reST, and puts it under
the develop/driver-model/ directory.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
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Driver model uses quite strong conventions on error codes, but these are
currently not clearly documented. Add a description of the commonly used
errors.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Sean Anderson <seanga2@gmail.com>
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Prepare v2021.04-rc5
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These docs are useful for developers, not users. Move them under that
section.
Suggested-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Simon Glass <sjg@chromium.org>
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