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authorLinus Torvalds <torvalds@linux-foundation.org>2022-08-02 18:35:17 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-08-02 18:35:17 +0300
commit7d0d3fa7339ed5a06d6608b7cde9f079eba62bb1 (patch)
tree3bcb4ecd7bf5d08b0bd6a36a9c150852b522ea38 /arch/arm/Kconfig
parentdd65b964922ed618a50866bd3895cf3ff646a5b9 (diff)
parent1785ab769824b800d7dea83aecc88c90377a6a5d (diff)
downloadlinux-7d0d3fa7339ed5a06d6608b7cde9f079eba62bb1.tar.xz
Merge tag 'arm-boardfiles-6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM boardfile deprecation from Arnd Bergmann: "Over the past ten years, new machine support was based on device tree, and an initial set of about 400 boards using ATAGS with boardfile for booting were grandfathered in, with about half of them either removed or converted to DT over time. Based on the recent mailing list discussion I started, I have now turned the findings into a set of patches that marks most board files as 'depends on UNUSED_BOARD_FILES', leaving only 38 of the 196 boards. For the boards that are marked as unused, there are two final chances for potential users: The removal is scheduled to take place after the longterm stable kernel at the end of 2022, so users can stay on that version for another few years, and if anyone still has one of these machines and is planning to keep updating kernels beyond that version, they can speak up now to have their boards taken off the list again. Waiting for the LTS release also makes sure that there will be at least one longterm kernel that contains the recent multiplatform conversion along while still supporting all legacy boards. The short summary of the current status is: - The s3c24xx, cns3xxx, iop32x and mv78xx0 platforms have no known users and will be removed entirely. - The mmp and davinci platforms have DT support for the important machines and will become DT-only after this. - s3c64xx, dove, orion5x, and pxa keep some board files to allow those to be migrated over to DT more easily, but most board files are getting removed now. DT support on these platforms is partially working but requires changes to additional drivers for the other boards. - omap1, ep93xx, sa1100, footbridge and rpc have no DT support at the moment but have some boards with known users. Removing the board files that nobody uses should make it easier to try a DT conversion if anyone cares. There is no explicit timeline what happens with the boards that remain after this removal, but I expect to revisit this in the future, and with most boards gone, there will be a good time to do a treewide review of platform drivers that never gained DT support and have no remaining in-tree board files" Link: https://lore.kernel.org/linux-arm-kernel/CAK8P3a0Z9vGEQbVRBo84bSyPFM-LF+hs5w8ZA51g2Z+NsdtDQA@mail.gmail.com/ * tag 'arm-boardfiles-6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: ARM: cns3xxx: add CONFIG_UNUSED_BOARD_FILES dependency ARM: iop32x: mark as unused ARM: s3c: mark most board files as unused ARM: omap1: add Kconfig dependencies for unused boards ARM: sa1100: mark most boards as unused ARM: footbridge: mark cats board for removal ARM: mmp: mark all board files for removal ARM: ep93xx: mark most board files as unused ARM: davinci: mark all ATAGS board files as unused ARM: orion: add ATAGS dependencies ARM: pxa: add Kconfig dependencies for ATAGS based boards ARM: add CONFIG_UNUSED_BOARD_FILES ARM: add ATAGS dependencies to non-DT platforms
Diffstat (limited to 'arch/arm/Kconfig')
-rw-r--r--arch/arm/Kconfig21
1 files changed, 18 insertions, 3 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index cb37b17226e5..405596676473 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -350,6 +350,7 @@ config ARCH_MULTIPLATFORM
config ARCH_FOOTBRIDGE
bool "FootBridge"
depends on CPU_LITTLE_ENDIAN
+ depends on ATAGS
select CPU_SA110
select FOOTBRIDGE
select NEED_MACH_MEMORY_H
@@ -361,6 +362,7 @@ config ARCH_RPC
bool "RiscPC"
depends on !CC_IS_CLANG && GCC_VERSION < 90100 && GCC_VERSION >= 60000
depends on CPU_LITTLE_ENDIAN
+ depends on ATAGS
select ARCH_ACORN
select ARCH_MAY_HAVE_PC_FDC
select ARCH_SPARSEMEM_ENABLE
@@ -380,6 +382,7 @@ config ARCH_RPC
config ARCH_SA1100
bool "SA1100-based"
depends on CPU_LITTLE_ENDIAN
+ depends on ATAGS
select ARCH_MTD_XIP
select ARCH_SPARSEMEM_ENABLE
select CLKSRC_MMIO
@@ -1541,14 +1544,26 @@ config USE_OF
Include support for flattened device tree machine descriptions.
config ATAGS
- bool "Support for the traditional ATAGS boot data passing" if USE_OF
+ bool "Support for the traditional ATAGS boot data passing"
default y
help
This is the traditional way of passing data to the kernel at boot
time. If you are solely relying on the flattened device tree (or
the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
- to remove ATAGS support from your kernel binary. If unsure,
- leave this to y.
+ to remove ATAGS support from your kernel binary.
+
+config UNUSED_BOARD_FILES
+ bool "Board support for machines without known users"
+ depends on ATAGS
+ help
+ Most ATAGS based board files are completely unused and are
+ scheduled for removal in early 2023, and left out of kernels
+ by default now. If you are using a board file that is marked
+ as unused, turn on this option to build support into the kernel.
+
+ To keep support for your individual board from being removed,
+ send a reply to the email discussion at
+ https://lore.kernel.org/all/CAK8P3a0Z9vGEQbVRBo84bSyPFM-LF+hs5w8ZA51g2Z+NsdtDQA@mail.gmail.com/
config DEPRECATED_PARAM_STRUCT
bool "Provide old way to pass kernel parameters"