Arch maintainers, please ack/review patches. This is a resend of a series from Frank last year[1]. I worked in Rob's review comments to unconditionally call unflatten_device_tree() and fixup/audit calls to of_have_populated_dt() so that behavior doesn't change. I need this series so I can add DT based tests in the clk framework. Either I can merge it through the clk tree once everyone is happy, or Rob can merge it through the DT tree and provide some branch so I can base clk patches on it. Changes from v3 (https://lore.kernel.org/r/20240202195909.3458162-1-sboyd@xxxxxxxxxx): * Made OF_UNITTEST depend on OF_EARLY_FLATREE * Made OF_EARLY_FLATREE depend on absence of arches that don't call unflatten_device_tree() * Added of_ prefix to dtb_ prefixed KUnit tests * Picked up tags Changes from v2 (https://lore.kernel.org/r/20240130004508.1700335-1-sboyd@xxxxxxxxxx): * Reorder patches to have OF changes largely first * No longer modify initial_boot_params if ACPI=y * Put arm64 patch back to v1 Changes from v1 (https://lore.kernel.org/r/20240112200750.4062441-1-sboyd@xxxxxxxxxx): * x86 patch included * arm64 knocks out initial dtb if acpi is in use * keep Kconfig hidden but def_bool enabled otherwise Changes from Frank's series[1]: * Add a DTB loaded kunit test * Make of_have_populated_dt() return false if the DTB isn't from the bootloader * Architecture calls made unconditional so that a root node is always made Frank Rowand (2): of: Create of_root if no dtb provided by firmware of: unittest: treat missing of_root as error instead of fixing up Stephen Boyd (5): of: Always unflatten in unflatten_and_copy_device_tree() um: Unconditionally call unflatten_device_tree() x86/of: Unconditionally call unflatten_and_copy_device_tree() arm64: Unconditionally call unflatten_device_tree() of: Add KUnit test to confirm DTB is loaded arch/arm64/kernel/setup.c | 3 +- arch/um/kernel/dtb.c | 14 ++++---- arch/x86/kernel/devicetree.c | 24 +++++++------- drivers/of/.kunitconfig | 3 ++ drivers/of/Kconfig | 14 ++++++-- drivers/of/Makefile | 4 ++- drivers/of/empty_root.dts | 6 ++++ drivers/of/fdt.c | 64 +++++++++++++++++++++++++++--------- drivers/of/of_test.c | 57 ++++++++++++++++++++++++++++++++ drivers/of/platform.c | 3 -- drivers/of/unittest.c | 16 +++------ include/linux/of.h | 25 ++++++++------ 12 files changed, 168 insertions(+), 65 deletions(-) create mode 100644 drivers/of/.kunitconfig create mode 100644 drivers/of/empty_root.dts create mode 100644 drivers/of/of_test.c [1] https://lore.kernel.org/r/20230317053415.2254616-1-frowand.list@xxxxxxxxx base-commit: 6613476e225e090cc9aad49be7fa504e290dd33d -- https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git/ https://git.kernel.org/pub/scm/linux/kernel/git/sboyd/spmi.git
