[PATCH v5 0/7] clk: Add support for clock nexus

Adding support for clock nexus had some prerequisites requested by
Stephen, such as adding new selftests, the initial discussions come
from:

Link: https://lore.kernel.org/linux-clk/[email protected]/

Signed-off-by: Miquel Raynal (Schneider Electric) <[email protected]>
---
Changes in v5:
- Collected tags.
- Added the of_ prefix on the new kunit helper.
- Reworded a commit message.
- All remaining points raised by Sashiko do not seem relevant.
- Link to v4: https://lore.kernel.org/r/20260717-schneider-v7-2-rc1-eip201-upstream-v4-0-751547e160e5@bootlin.com

Changes in v4:
- Fixed the kernel doc of of_find_node_by_name_kunit() which was lacking
  the fact that it could return NULL upon lookup failure. Also improved
  the commit message by mentioning the addition of that helper.
- All other Sashiko reports have either been disregarded because they
  were way too unrelated or just not relevant enough in my opinion.
- Link to v3: https://lore.kernel.org/r/20260716-schneider-v7-2-rc1-eip201-upstream-v3-0-98454e83845c@bootlin.com

Changes in v3:
- Prevent out-of-bounds clock-ranges fallback in of_parse_clkspec()
- tests: Check of_clk_add_hw_provider_kunit() return value and fix node
  ref leaks
- Link to v2: https://lore.kernel.org/r/20260710-schneider-v7-2-rc1-eip201-upstream-v2-0-b4680787377e@bootlin.com

Changes in v2:
- Collected tags.
- Rebased on top of v7.2-rc1
- Exported (test) clock symbols using the _IF_KUNIT() variant, and
  imported the NS in the test file.
- Fixed a leaking node reported by Brian in the tests. Also used
  existing helpers to simplify the test implementation as he wisely
  suggested.
- Reworded the nexus node binding description as suggested by Stephen.
- Dropped redundant and non restraining properties from the Nexus
  node as suggested by Rob.
- Assigned clock/clock-rate properties now traverse Nexus nodes.
- Rename helpers following Stephen proposals.
- Rework tests following Stephen hints.
- Link to v1: https://lore.kernel.org/r/[email protected]

---
Miquel Raynal (Schneider Electric) (7):
      dt-bindings: clock: Introduce nexus nodes
      clk: tests: Add clk_parse_clkspec() Kunit testing
      clk: tests: Add Kunit testing for of_clk_get_parent_name()
      clk: Improve a couple of comments
      clk: Use the generic OF phandle parsing in only one place
      clk: Add support for clock nexus dt bindings
      clk: tests: Add Kunit testing for nexus nodes

 .../bindings/clock/clock-nexus-node.yaml           |  30 +++++
 drivers/clk/Makefile                               |   1 +
 drivers/clk/clk-conf.c                             |  12 +-
 drivers/clk/clk.c                                  |  15 ++-
 drivers/clk/clk_kunit_helpers.c                    |  31 +++++
 drivers/clk/clk_test.c                             | 139 +++++++++++++++++++++
 drivers/clk/kunit_clk_parse_clkspec.dtso           |  31 +++++
 include/kunit/clk.h                                |   2 +
 8 files changed, 249 insertions(+), 12 deletions(-)
---
base-commit: 7f26e010764df304602f33912a0550dcf46e72c2
change-id: 20260710-schneider-v7-2-rc1-eip201-upstream-a470e5eab92d

Best regards,
-- 
Miquel Raynal (Schneider Electric) <[email protected]>