On Thu, 2 Mar 2023 at 09:38, Stephen Boyd <sboyd@xxxxxxxxxx> wrote: > > This patch series adds unit tests for the clk fixed rate basic type and > the clk registration functions that use struct clk_parent_data. To get > there, we add support for loading a DTB into the UML kernel that's > running the unit tests along with probing platform drivers to bind to > device nodes specified in DT. > > With this series, we're able to exercise some of the code in the common > clk framework that uses devicetree lookups to find parents and the fixed > rate clk code that scans devicetree directly and creates clks. Please > review. > Thanks Stephen -- this is really neat! This works well here, and I love all of the tests for the KUnit/device-tree integration as well. I'm still looking through the details of it (alas, I've mostly lived in x86-land, so my device-tree knowledge is, uh, spotty to say the least), but apart from possibly renaming some things or similarly minor tweaks, I've not got any real suggestions thus far. I do wonder whether we'll want, on the KUnit side, to have some way of supporting KUnit device trees on non-UML architecctures (e.g., if we need to test something architecture-specific, or on a big-endian platform, etc), but I think that's a question for the future, rather than something that affects this series. Similarly, I wonder if there's something we could do with device tree overlays, in order to make it possible for tests to swap nodes in and out for testing. I don't think either of those ideas should block this from getting in though. > I Cced everyone to all the patches so they get the full context. I'm > hoping I can take the whole pile through the clk tree as they almost all > depend on each other. In the future I imagine it will be easy to add > more test nodes to the clk.dtsi file and not need to go across various > maintainer trees like this series does. That seems pretty sensible to me. I expect there'll be a few minor conflicts on the KUnit side (there are a bunch of small lib/kunit/Makefile changes in 6.3, and there's a plan to do some more serious changes to the kunit_resource API at some point, though I have my doubts they'll all hit in 6.4), but I doubt they'll cause too much strife. Cheers, -- David > > Stephen Boyd (8): > dt-bindings: Add linux,kunit binding > of: Enable DTB loading on UML for KUnit tests > kunit: Add test managed platform_device/driver APIs > clk: Add test managed clk provider/consumer APIs > dt-bindings: kunit: Add fixed rate clk consumer test > clk: Add KUnit tests for clk fixed rate basic type > dt-bindings: clk: Add KUnit clk_parent_data test > clk: Add KUnit tests for clks registered with struct clk_parent_data > > .../clock/linux,clk-kunit-parent-data.yaml | 47 ++ > .../kunit/linux,clk-kunit-fixed-rate.yaml | 35 ++ > .../bindings/kunit/linux,kunit.yaml | 24 + > arch/um/kernel/dtb.c | 29 +- > drivers/clk/.kunitconfig | 3 + > drivers/clk/Kconfig | 7 + > drivers/clk/Makefile | 6 + > drivers/clk/clk-fixed-rate_test.c | 296 ++++++++++++ > drivers/clk/clk-kunit.c | 204 ++++++++ > drivers/clk/clk-kunit.h | 28 ++ > drivers/clk/clk_test.c | 456 +++++++++++++++++- > drivers/of/Kconfig | 26 + > drivers/of/Makefile | 1 + > drivers/of/kunit/.kunitconfig | 4 + > drivers/of/kunit/Makefile | 4 + > drivers/of/kunit/clk.dtsi | 30 ++ > drivers/of/kunit/kunit.dtsi | 9 + > drivers/of/kunit/kunit.dtso | 4 + > drivers/of/kunit/uml_dtb_test.c | 55 +++ > include/kunit/platform_driver.h | 15 + > lib/kunit/Makefile | 6 + > lib/kunit/platform_driver-test.c | 107 ++++ > lib/kunit/platform_driver.c | 207 ++++++++ > 23 files changed, 1599 insertions(+), 4 deletions(-) > create mode 100644 Documentation/devicetree/bindings/clock/linux,clk-kunit-parent-data.yaml > create mode 100644 Documentation/devicetree/bindings/kunit/linux,clk-kunit-fixed-rate.yaml > create mode 100644 Documentation/devicetree/bindings/kunit/linux,kunit.yaml > create mode 100644 drivers/clk/clk-fixed-rate_test.c > create mode 100644 drivers/clk/clk-kunit.c > create mode 100644 drivers/clk/clk-kunit.h > create mode 100644 drivers/of/kunit/.kunitconfig > create mode 100644 drivers/of/kunit/Makefile > create mode 100644 drivers/of/kunit/clk.dtsi > create mode 100644 drivers/of/kunit/kunit.dtsi > create mode 100644 drivers/of/kunit/kunit.dtso > create mode 100644 drivers/of/kunit/uml_dtb_test.c > create mode 100644 include/kunit/platform_driver.h > create mode 100644 lib/kunit/platform_driver-test.c > create mode 100644 lib/kunit/platform_driver.c > > > base-commit: c9c3395d5e3dcc6daee66c6908354d47bf98cb0c > -- > https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git/ > https://git.kernel.org/pub/scm/linux/kernel/git/sboyd/spmi.git >
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