u-boot.git/include/dm/ofnode.h, branch v2026.04

dm: core: Provide ofnode_find_subnode_unit()

2025-01-22T23:08:24+00:00

The ofnode_find_subnode() function currently processes things two
different ways, so the treatment of unit addresses differs depending on
whether OF_LIVE is enabled or not.

Add a new version which uses the ofnode API and add a test to check that
unit addresses can be matched correctly. Leave the old function in place
for the !OF_LIVE case, to avoid a code-size increase, e.g. on
firefly-rk3288

Signed-off-by: Simon Glass

dm: core: Provide ofnode_name_eq_unit() to accept a unit address

2025-01-22T23:08:24+00:00

When a unit-address is provided, use it to match against the node
name.

Since this increases code size, put it into a separate function.

Signed-off-by: Simon Glass

dm: core: Clarify behaviour of ofnode_name_eq()

2025-01-22T23:08:23+00:00

This function is somewhat ambiguous, so expand the comments and add a
test for the undefined behaviour.

Signed-off-by: Simon Glass

ofnode: Update of_add_subnode() to indicate name is alloced

2025-01-22T21:58:03+00:00

This function allocates memory for the node name, so mention this in the
function comment.

Signed-off-by: Simon Glass

dm: core: implement phandle ofnode_options helper

2024-12-06T19:00:41+00:00

Implement ofnode_options phandle helper to get an ofnode from a phandle
option in /options/u-boot.

This helper can be useful since new DT yaml usually require to link a
phandle of a node instead of referencing it by name or other indirect
way.

Signed-off-by: Christian Marangi 
Reviewed-by: Simon Glass

dm: core: implement ofnode/tree_parse_phandle() helper

2024-12-06T19:00:40+00:00

Implement ofnode/tree_parse_phandle() helper as an equivalent of
of_parse_phandle to handle simple single value phandle.

Signed-off-by: Christian Marangi 
Reviewed-by: Simon Glass

dm: core: implement oftree variant of parse_phandle OPs

2024-12-06T19:00:40+00:00

Implement oftree variant of parse_phandle OPs.

There is currently a very hidden and laten BUG with parse_phandle OPs
that doesn't permit the support of multiple DTS in a system. One usage
example if sandbox with the usage of other.dts

The BUG is only present on live scenario where of_... OPs are used and
it's not present when fdt... OPs are used.

This is caused by an assumption made in __of_parse_phandle_with_args,
with the of_find_node_by_phandle call that pass the first arg as NULL.

This makes of_find_node_by_phandle use the default root node of the
system and doesn't permit the usage of alternative tree. This is correct
for normal system and also for the linux kernel where it's assumed a
single device tree.

It's problematic if other device tree needs to be used.

To fix this, introduce __of_root_parse_phandle_with_args to define a
root device tree for of_find_node_by_phandle.

Introduce all the variant OPs for this and in ofnode, the oftree OPs
following how it's done for other OPs with similar task.

For FDT scenario, ofnode_from_fdtdec_phandle_args is reworked to accept
a new variable, node and noffset_to_ofnode is used instead of
offset_to_ofnode. This is required to support multiple FDB blob to
calculate the correct of_offset of the ofnode.

Signed-off-by: Christian Marangi 
Reviewed-by: Simon Glass

dm: core: implement ofnode_options helpers

2024-10-10T22:02:20+00:00

Implement ofnode_options helpers to read options in /options/u-boot to
adapt to the new way to declare options as described in [1].

[1] dtschema/schemas/options/u-boot.yaml

Signed-off-by: Christian Marangi 
Reviewed-by: Simon Glass

serial: zynqmp: Fetch baudrate from dtb and update

2023-11-07T12:47:08+00:00

The baudrate configured in .config is taken by default by serial. If
change of baudrate is required then the .config needs to changed and
u-boot recompilation is required or the u-boot environment needs to be
updated.

To avoid this, support is added to fetch the baudrate directly from the
device tree file and update.
The serial, prints the log with the configured baudrate in the dtb.
The commit c4df0f6f315c ("arm: mvebu: Espressobin: Set default value for
$fdtfile env variable") is taken as reference for changing the default
environment variable.

The default environment stores the default baudrate value, When default
baudrate and dtb baudrate are not same glitches are seen on the serial.
So, the environment also needs to be updated with the dtb baudrate to
avoid the glitches on the serial.

Also add test to cover this new function.

Signed-off-by: Algapally Santosh Sagar 
Signed-off-by: Venkatesh Yadav Abbarapu 
Link: https://lore.kernel.org/r/20230921112043.3144726-3-venkatesh.abbarapu@amd.com
Signed-off-by: Michal Simek

pci: serial: Support reading PCI-register size with base

2023-10-06T18:38:13+00:00

The PCI helpers read only the base address for a PCI region. In some cases
the size is needed as well, e.g. to pass along to a driver which needs to
know the size of its register area.

Update the functions to allow the size to be returned. For serial, record
the information and provided it with the serial_info() call.

A limitation still exists in that the size is not available when OF_LIVE
is enabled, so take account of that in the tests.

Signed-off-by: Simon Glass