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Now that Linux has accepted these tags, move U-Boot over to use them.
Tidy up the comments and formatting, making sure that VPL is mentioned
too.
Signed-off-by: Simon Glass <[email protected]>
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Document the hunters and the new way that iteration works.
Signed-off-by: Simon Glass <[email protected]>
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The rest of the unmigrated CONFIG symbols in the CONFIG_SYS namespace do
not easily transition to Kconfig. In many cases they likely should come
from the device tree instead. Move these out of CONFIG namespace and in
to CFG namespace.
Signed-off-by: Tom Rini <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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https://source.denx.de/u-boot/custodians/u-boot-video
- fix [hv]sync active vs back porch in dw_mipi_dsi
- simplefb rotation support
- support splash as raw image from MMC
- enhancements to Truetype console (multiple fonts and sizes)
- drop old LCD support
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Now that all the old code is gone, rename this option. Driver model
migration is now complete.
Signed-off-by: Simon Glass <[email protected]>
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In a couple of places the document says u-boot,pre-reloc but all
examples show u-boot,dm-pre-reloc, use the latter consistently.
Signed-off-by: Michal Suchanek <[email protected]>
Reviewed-by: Fabio Estevam <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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There are no platforms that have not migrated to using DM_KEYBOARD,
remove the legacy option.
Cc: Simon Glass <[email protected]>
Signed-off-by: Tom Rini <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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Update this function's comment and also the livetree documentation, so it
is clear when to use the function.
Signed-off-by: Simon Glass <[email protected]>
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At present ofnode_write_prop() is inconsistent between livetree and
flattree, in that livetree requires the caller to ensure the property
value is stable (e.g. in rodata or allocated) but flattree does not, since
it makes a copy.
This makes the API call a bit painful to use, since the caller must do
different things depending on OF_LIVE.
Add a new 'copy' argument which tells the function to make a copy if
needed. Add some tests to cover this behaviour.
Signed-off-by: Simon Glass <[email protected]>
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The current tests do not cover all functions, nor do they cover the new
multi-tree functionality. Add and update the tests accordingly and update
the 'future work' notes in the documentation.
There is a still more testing needed for the failure cases, since at
present some ofnode functions return a libfdt error code instead of
converting it to an errno.
Signed-off-by: Simon Glass <[email protected]>
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Add the logic to redirect requests for the device tree through a function
which can look up the tree ID. This works by using the top bits of
ofnode.of_offset to encode a tree.
It is assumed that there will only be a few device trees used at runtime,
typically the control FDT (always tree ID 0) and possibly a separate FDT
to be passed the OS.
The maximum number of device trees supported at runtime is 8, with this
implementation. That would use bits 30:28 of the node-offset value,
meaning that the positive offset range is limited to bits 27:0, versus
30:1 with this feature disabled. That still allows a device tree of up
to 256MB, which should be enough for most FITs. Larger ones can be
supported by using external data with the FIT, or by enabling OF_LIVE.
Update the documentation a little and fix up the comment for
ofnode_valid().
Signed-off-by: Simon Glass <[email protected]>
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When the flat device tree changes it can mess up the live tree since that
uses the flat tree for its strings. This affects only a few sandbox tests
which modify the device tree, but the number will grow as ofnode support
for writing improves.
While the control FDT is not intended to change while U-Boot is running,
some tests do so. For example, the ofnode interface only supports
modifying properties in the control FDT, so tests must use that.
To solve this problem, keep a copy of the FDT and restore it as needed
when the test is finished. The copy only happens on sandbox (except SPL
builds), to reduce memory usage and because these tests are not useful on
other boards. For other boards, a checksum is taken to ensure that nothing
changes.
It would be possible to always checksum the FDT on sandbox and only
restore it if needed, but this is slightly slower than restoring it every
time, at least with crc8.
Move the code which checks for success to the very end, for clarity.
Signed-off-by: Simon Glass <[email protected]>
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This option is fact really related to SPL. For U-Boot proper we always use
driver model for block devices, so CONFIG_BLK is enabled if block devices
are in use.
It is only for SPL that we have two cases:
- SPL_BLK is enabled, in which case we use driver model and blk-uclass.c
- SPL_BLK is not enabled, in which case (if we need block devices) we must
use blk_legacy.c
Rename the symbol to SPL_LEGACY_BLOCK to make this clear. This is
different enough from BLK and SPL_BLK that there should be no confusion.
Signed-off-by: Simon Glass <[email protected]>
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Explain when devices should get activated.
Signed-off-by: Michal Suchanek <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Reviewed-by: Heinrich Schuchardt <[email protected]>
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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 <[email protected]>
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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 <[email protected]>
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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 <[email protected]>
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With the last platform for this architecture removed, remove the rest of
the architecture support as well.
Cc: Marek Vasut <[email protected]>
Signed-off-by: Tom Rini <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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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 <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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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 <[email protected]>
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Some basic stuff about tag support is explained under
doc/devlop/driver-model.
Signed-off-by: AKASHI Takahiro <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
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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 <[email protected]>
Reviewed-by: Fabio Estevam <[email protected]>
Signed-off-by: Heinrich Schuchardt <[email protected]>
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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 <[email protected]>
Reviewed-by: Simon Glass <[email protected]>
Tested on: Macbook Air M1
Tested-by: Simon Glass <[email protected]>
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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 <[email protected]>
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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 <[email protected]>
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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 <[email protected]>
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This error can be confusing so mention it specifically in the
documentation.
Signed-off-by: Simon Glass <[email protected]>
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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 <[email protected]>
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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 <[email protected]>
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Split this information into subsections and expand it.
Signed-off-by: Simon Glass <[email protected]>
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Migration is complete. Drop the message.
Signed-off-by: Simon Glass <[email protected]>
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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 <[email protected]>
Reviewed-by: Walter Lozano <[email protected]>
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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 <[email protected]>
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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 <[email protected]>
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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 <[email protected]>
Reviewed-by: Sean Anderson <[email protected]>
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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 <[email protected]>
Signed-off-by: Simon Glass <[email protected]>
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