Changes in Kconfig

332857fd - of: Allow overlay kunit tests to run CONFIG_OF_OVERLAY=n

Wed, 16 Oct 2024 21:20:15 +0000

of: Allow overlay kunit tests to run CONFIG_OF_OVERLAY=nSome configurations want to enable CONFIG_KUNIT without enablingCONFIG_OF_OVERLAY. The kunit overlay code already skips ifCONFIG_OF_OVERLAY isn't enabled, so this select here isn't really doinganything besides making it easier to run the tests without themskipping. Remove the select and move the config setting to thedrivers/of/.kunitconfig file so that the overlay tests can be run withor without CONFIG_OF_OVERLAY set to test either behavior.Fixes: 5c9dd72d8385 ("of: Add a KUnit test for overlays and test managed APIs")Signed-off-by: Stephen Boyd Acked-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/20241016212016.887552-1-sboyd@kernel.orgSigned-off-by: Rob Herring (Arm) List of files: /linux-6.15/drivers/of/Kconfig

654102df - kbuild: add generic support for built-in boot DTBs

Mon, 23 Sep 2024 07:56:03 +0000

kbuild: add generic support for built-in boot DTBsSome architectures embed boot DTBs in vmlinux. A potential issue forthese architectures is a race condition during parallel builds becauseKbuild descends into arch/*/boot/dts/ twice.One build thread is initiated by the 'dtbs' target, which is aprerequisite of the 'all' target in the top-level Makefile: ifdef CONFIG_OF_EARLY_FLATTREE all: dtbs endifFor architectures that support the built-in boot dtb, arch/*/boot/dts/is visited also during the ordinary directory traversal in order tobuild obj-y objects that wrap DTBs.Since these build threads are unaware of each other, they can runsimultaneously during parallel builds.This commit introduces a generic build rule to scripts/Makefile.vmlinuxto support embedded boot DTBs in a race-free way. Architectures thatwant to use this rule need to select CONFIG_GENERIC_BUILTIN_DTB.After the migration, Makefiles under arch/*/boot/dts/ will be visitedonly once to build only *.dtb files.This change also aims to unify the CONFIG options used for built-in DTBssupport. Currently, different architectures use different CONFIG optionsfor the same purposes.With this commit, the CONFIG options will be unified as follows: - CONFIG_GENERIC_BUILTIN_DTB This enables the generic rule for built-in boot DTBs. This will be renamed to CONFIG_BUILTIN_DTB after all architectures migrate to the generic rule. - CONFIG_BUILTIN_DTB_NAME This specifies the path to the embedded DTB. (relative to arch/*/boot/dts/) - CONFIG_BUILTIN_DTB_ALL If this is enabled, all DTB files compiled under arch/*/boot/dts/ are embedded into vmlinux. Only used by MIPS.Signed-off-by: Masahiro Yamada List of files: /linux-6.15/drivers/of/Kconfig

5c9dd72d - of: Add a KUnit test for overlays and test managed APIs

Thu, 18 Jul 2024 21:05:03 +0000

of: Add a KUnit test for overlays and test managed APIsTest the KUnit test managed overlay APIs. Confirm that platform devicesare created and destroyed properly. This provides us confidence that thetest managed APIs work correctly and can be relied upon to provide testswith fake platform devices and device nodes via overlays compiled intothe kernel image.Cc: Rob Herring Cc: Saravana Kannan Cc: Daniel Latypov Cc: Brendan Higgins Reviewed-by: David Gow Cc: Rae Moar Reviewed-by: Rob Herring (Arm) Signed-off-by: Stephen Boyd Link: https://lore.kernel.org/r/20240718210513.3801024-5-sboyd@kernel.org List of files: /linux-6.15/drivers/of/Kconfig

893ecc6d - of: Add KUnit test to confirm DTB is loaded

Sat, 17 Feb 2024 01:05:56 +0000

of: Add KUnit test to confirm DTB is loadedAdd a KUnit test that confirms a DTB has been loaded, i.e. there is aroot node, and that the of_have_populated_dt() API works properly. Weskip the test when CONFIG_OF_EARLY_FLATREE=n because in that case weknow architecture code hasn't called unflatten_(and_copy_)?device_tree()which would populate some sort of root node.Cc: Rob Herring Cc: Frank Rowand Reviewed-by: David Gow Cc: Brendan Higgins Signed-off-by: Stephen Boyd Link: https://lore.kernel.org/r/20240217010557.2381548-8-sboyd@kernel.orgSigned-off-by: Rob Herring List of files: /linux-6.15/drivers/of/Kconfig

7b937cc2 - of: Create of_root if no dtb provided by firmware

Sat, 17 Feb 2024 01:05:51 +0000

of: Create of_root if no dtb provided by firmwareWhen enabling CONFIG_OF on a platform where 'of_root' is not populatedby firmware, we end up without a root node. In order to apply overlaysand create subnodes of the root node, we need one. Create this root nodeby unflattening an empty builtin dtb.If firmware provides a flattened device tree (FDT) then the FDT isunflattened via setup_arch(). Otherwise, the call tounflatten(_and_copy)?_device_tree() will create an empty root node.We make of_have_populated_dt() return true only if the DTB was loaded byfirmware so that existing callers don't change behavior after thispatch. The call in the of platform code is removed because it preventsoverlays from creating platform devices when the empty root node isused.[sboyd@kernel.org: Update of_have_populated_dt() to treat this empty dtbas not populated. Drop setup_of() initcall]Signed-off-by: Frank Rowand Link: https://lore.kernel.org/r/20230317053415.2254616-2-frowand.list@gmail.comCc: Rob Herring Signed-off-by: Stephen Boyd Link: https://lore.kernel.org/r/20240217010557.2381548-3-sboyd@kernel.orgSigned-off-by: Rob Herring List of files: /linux-6.15/drivers/of/Kconfig

7e08baf6 - of: make OF_EARLY_FLATTREE depend on HAS_IOMEM

Fri, 07 Jul 2023 13:58:52 +0000

of: make OF_EARLY_FLATTREE depend on HAS_IOMEMOn s390 systems (aka mainframes), it has classic channel devices fornetworking and permanent storage that are currently even more commonthan PCI devices. Hence it could have a fully functional s390 kernelwith CONFIG_PCI=n, then the relevant iomem mapping functions[including ioremap(), devm_ioremap(), etc.] are not available.In LKP error report at below on s390:------ld: kernel/dma/coherent.o: in function `dma_init_coherent_memory':coherent.c:(.text+0x102): undefined reference to `memremap'ld: coherent.c:(.text+0x226): undefined reference to `memunmap'ld: kernel/dma/coherent.o: in function `dma_declare_coherent_memory':coherent.c:(.text+0x8b8): undefined reference to `memunmap'ld: kernel/dma/coherent.o: in function `dma_release_coherent_memory':coherent.c:(.text+0x9aa): undefined reference to `memunmap'------In the config file, several Kconfig options are:------'# CONFIG_PCI is not set'CONFIG_OF_EARLY_FLATTREE=yCONFIG_DMA_DECLARE_COHERENT=y------So, enabling OF_EARLY_FLATTREE will select DMA_DECLARE_COHERENTand cause above building errors even though they are not neededbecause CONFIG_PCI is disabled.Here let OF_EARLY_FLATTREE depend on HAS_IOMEM so that it won'tbe built to cause compiling error if PCI is unset.Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202306211329.ticOJCSv-lkp@intel.com/Signed-off-by: Baoquan He Cc: Rob Herring Cc: Frank Rowand Cc: devicetree@vger.kernel.orgLink: https://lore.kernel.org/r/20230707135852.24292-9-bhe@redhat.comSigned-off-by: Rob Herring List of files: /linux-6.15/drivers/of/Kconfig

c00a60d6 - of: address: always use dma_default_coherent for default coherency

Sat, 01 Apr 2023 09:15:31 +0000

of: address: always use dma_default_coherent for default coherencyAs for now all arches have dma_default_coherent reflecting defaultDMA coherency for of devices, so there is no need to have a standaloneconfig option.Signed-off-by: Jiaxun Yang Reviewed-by: Rob Herring Acked-by: Michael Ellerman (powerpc)Signed-off-by: Christoph Hellwig List of files: /linux-6.15/drivers/of/Kconfig

f381b31a - of: update kconfig unittest help

Mon, 13 Feb 2023 18:56:58 +0000

of: update kconfig unittest helpAdd more information about the impact the of unittests have on thelive devicetree and why the tests should only be enabled for developerkernels.Add information about processing the test output such that theresults are more complete and comprehendable.Signed-off-by: Frank Rowand Link: https://lore.kernel.org/r/20230213185702.395776-4-frowand.list@gmail.comSigned-off-by: Rob Herring List of files: /linux-6.15/drivers/of/Kconfig

e330fb14 - of: net: move of_net under net/

Thu, 07 Oct 2021 01:06:54 +0000

of: net: move of_net under net/Rob suggests to move of_net.c from under drivers/of/ somewhereto the networking code.Suggested-by: Rob Herring Signed-off-by: Jakub Kicinski Reviewed-by: Rob Herring Signed-off-by: David S. Miller List of files: /linux-6.15/drivers/of/Kconfig

1ee292a6 - of: Drop reserved mem dependency on DMA_DECLARE_COHERENT and DMA_CMA

Thu, 27 May 2021 22:32:17 +0000

of: Drop reserved mem dependency on DMA_DECLARE_COHERENT and DMA_CMAReserved memory regions can be used for more than just DMA regions, soonly enabling on DMA_DECLARE_COHERENT (via HAS_DMA) or DMA_CMA is wrong.This effectively doesn't matter except for the few cases arches selectNO_DMA.At least, these users of RESERVEDMEM_OF_DECLARE depend on reserved memorysupport:arch/riscv/mm/init.c:RESERVEDMEM_OF_DECLARE(elfcorehdr, "linux,elfcorehdr", elfcore_hdr_setup);drivers/memory/tegra/tegra210-emc-table.c:RESERVEDMEM_OF_DECLARE(tegra210_emc_table, "nvidia,tegra210-emc-table",drivers/soc/fsl/qbman/bman_ccsr.c:RESERVEDMEM_OF_DECLARE(bman_fbpr, "fsl,bman-fbpr", bman_fbpr);drivers/soc/fsl/qbman/qman_ccsr.c:RESERVEDMEM_OF_DECLARE(qman_fqd, "fsl,qman-fqd", qman_fqd);drivers/soc/fsl/qbman/qman_ccsr.c:RESERVEDMEM_OF_DECLARE(qman_pfdr, "fsl,qman-pfdr", qman_pfdr);Let's simplify things and enable OF_RESERVED_MEM when OF_EARLY_FLATTREE isenabled.Cc: Christoph Hellwig Signed-off-by: Rob Herring Link: https://lore.kernel.org/r/20210527223217.1572631-1-robh@kernel.org List of files: /linux-6.15/drivers/of/Kconfig

14b26b12 - net: phy: Move of_mdio from drivers/of to drivers/net/mdio

Thu, 08 Oct 2020 14:47:06 +0000

net: phy: Move of_mdio from drivers/of to drivers/net/mdioBetter place for of_mdio.c is drivers/net/mdio.Move of_mdio.c from drivers/of to drivers/net/mdioSigned-off-by: Calvin Johnson Acked-by: Rob Herring Signed-off-by: Jakub Kicinski List of files: /linux-6.15/drivers/of/Kconfig

dabf6b36 - of: Add OF_DMA_DEFAULT_COHERENT & select it on powerpc

Sun, 26 Jan 2020 11:52:47 +0000

of: Add OF_DMA_DEFAULT_COHERENT & select it on powerpcThere's an OF helper called of_dma_is_coherent(), which checks if adevice has a "dma-coherent" property to see if the device is coherentfor DMA.But on some platforms devices are coherent by default, and on someplatforms it's not possible to update existing device trees to add the"dma-coherent" property.So add a Kconfig symbol to allow arch code to tellof_dma_is_coherent() that devices are coherent by default, regardlessof the presence of the property.Select that symbol on powerpc when NOT_COHERENT_CACHE is not set, ie.when the system has a coherent cache.Fixes: 92ea637edea3 ("of: introduce of_dma_is_coherent() helper")Cc: stable@vger.kernel.org # v3.16+Reported-by: Christian Zigotzky Tested-by: Christian Zigotzky Signed-off-by: Michael Ellerman Reviewed-by: Ulf Hansson Signed-off-by: Rob Herring List of files: /linux-6.15/drivers/of/Kconfig

ff4c25f2 - dma-mapping: improve selection of dma_declare_coherent availability

Sun, 03 Feb 2019 19:12:02 +0000

dma-mapping: improve selection of dma_declare_coherent availabilityThis API is primarily used through DT entries, but two architecturesand two drivers call it directly. So instead of selecting the configsymbol for random architectures pull it in implicitly for the actualusers. Also rename the Kconfig option to describe the feature better.Signed-off-by: Christoph Hellwig Acked-by: Paul Burton # MIPSAcked-by: Lee Jones Reviewed-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/of/Kconfig

34e04eed - of: select OF_RESERVED_MEM automatically

Fri, 01 Feb 2019 09:10:52 +0000

of: select OF_RESERVED_MEM automaticallyThe OF_RESERVED_MEM can be used if we have either CMA or the genericdeclare coherent code built and we support the early flattened DT.So don't bother making it a user visible options that is selectedby most configs that fit the above category, but just select it whenthe requirements are met.Signed-off-by: Christoph Hellwig Reviewed-by: Rob Herring List of files: /linux-6.15/drivers/of/Kconfig

39a751a4 - of: change overlay apply input data from unflattened to FDT

Mon, 12 Feb 2018 08:19:42 +0000

of: change overlay apply input data from unflattened to FDTMove duplicating and unflattening of an overlay flattened devicetree(FDT) into the overlay application code. To accomplish this,of_overlay_apply() is replaced by of_overlay_fdt_apply().The copy of the FDT (aka "duplicate FDT") now belongs to devicetreecode, which is thus responsible for freeing the duplicate FDT. Thecaller of of_overlay_fdt_apply() remains responsible for freeing theoriginal FDT.The unflattened devicetree now belongs to devicetree code, which isthus responsible for freeing the unflattened devicetree.These ownership changes prevent early freeing of the duplicated FDTor the unflattened devicetree, which could result in use after freeerrors.of_overlay_fdt_apply() is a private function for the anticipatedoverlay loader.Update unittest.c to use of_overlay_fdt_apply() instead ofof_overlay_apply().Move overlay fragments from artificial locations indrivers/of/unittest-data/tests-overlay.dtsi into one devicetreesource file per overlay. This led to changes indrivers/of/unitest-data/Makefile and drivers/of/unitest.c. - Add overlay directives to the overlay devicetree source files so that dtc will compile them as true overlays into one FDT data chunk per overlay. - Set CFLAGS for drivers/of/unittest-data/testcases.dts so that symbols will be generated for overlay resolution of overlays that are no longer artificially contained in testcases.dts - Unflatten and apply each unittest overlay FDT using of_overlay_fdt_apply(). - Enable the of_resolve_phandles() check for whether the unflattened overlay is detached. This check was previously disabled because the overlays from tests-overlay.dtsi were not unflattened into detached trees. - Other changes to unittest.c infrastructure to manage multiple test FDTs built into the kernel image (access by name instead of arbitrary number). - of_unittest_overlay_high_level(): previously unused code to add properties from the overlay_base devicetree to the live tree was triggered by the restructuring of tests-overlay.dtsi and thus testcases.dts. This exposed two bugs: (1) the need to dup a property before adding it, and (2) property 'name' is auto-generated in the unflatten code and thus will be a duplicate in the __symbols__ node - do not treat this duplicate as an error.Signed-off-by: Frank Rowand List of files: /linux-6.15/drivers/of/Kconfig

4670d610 - PCI: Move OF-related PCI functions into PCI core

Wed, 17 Jan 2018 23:36:39 +0000

PCI: Move OF-related PCI functions into PCI coreFollowing what has been done for other subsystems, move the remaining PCIrelated code out of drivers/of/ and into drivers/pci/of.cWith this, we can kill a few kconfig symbols.Signed-off-by: Rob Herring [bhelgaas: minor whitespace, comment cleanups]Signed-off-by: Bjorn Helgaas Cc: Frank Rowand List of files: /linux-6.15/drivers/of/Kconfig

af6074fc - of: Use SPDX license tag for DT files

Wed, 27 Dec 2017 18:55:14 +0000

of: Use SPDX license tag for DT filesConvert remaining DT files to use SPDX-License-Identifier tags.Cc: Benjamin Herrenschmidt Cc: Guennadi Liakhovetski Cc: Paul Mackerras Cc: Pantelis Antoniou Reviewed-by: Frank Rowand Reviewed-by: Philippe Ombredanne Signed-off-by: Rob Herring List of files: /linux-6.15/drivers/of/Kconfig

6019a3d0 - of: enable unittests on UML

Tue, 25 Jul 2017 19:46:56 +0000

of: enable unittests on UMLThe unittests can run on UML, but OF_IRQ and OF_ADDRESS need to beenabled. Rework the kconfig dependencies to enable the unittests. Theunittests cannot build on Sparc, so we need to add an explicitdependency for !SPARC.There's one failure in overlay tests because the base DT is notunflattened early.Cc: Thomas Meyer Signed-off-by: Rob Herring List of files: /linux-6.15/drivers/of/Kconfig

b56b5528 - of: make kobject and bin_attribute support configurable

Wed, 04 Oct 2017 19:09:40 +0000

of: make kobject and bin_attribute support configurableHaving device_nodes be kobjects is only needed if sysfs or OF_DYNAMIC isenabled. Otherwise, having a kobject in struct device_node isunnecessary bloat in minimal kernel configurations.Likewise, bin_attribute is only needed in struct property when sysfs isenabled, so we can make it configurable too.Tested-by: Nicolas Pitre Reviewed-by: Frank Rowand Acked-by: Grant Likely Signed-off-by: Rob Herring List of files: /linux-6.15/drivers/of/Kconfig

a9843193 - mtd: Kill the OF_MTD Kconfig option

Sat, 17 Sep 2016 17:47:58 +0000

mtd: Kill the OF_MTD Kconfig optionCommit d48f62b9a0a0 ("mtd: nand: move of_get_nand_xxx() helpers intonand_base.c") removed the drivers/of/of_mtd.c file but did not removethe associated OF_MTD Kconfig option.Signed-off-by: Boris Brezillon List of files: /linux-6.15/drivers/of/Kconfig