Sunxi64: Update CONFIG_CAN_* and CONFIG_CPU_FREQ_*
#8383
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armbian#8368 (review) Signed-off-by: Patrick Yavitz <[email protected]>
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AGM1968,
JohnTheCoolingFan,
PanderMusubi,
Tonymac32,
chraac,
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krachlatte,
schwar3kat and
teknoid
as code owners
WalkthroughThis change updates the kernel configuration files for the sunxi64 platform, altering the default CPU frequency governor from "performance" to "ondemand" and removing the explicit enabling of the "ondemand" governor. Additionally, it enables a comprehensive set of CAN (Controller Area Network) driver modules as loadable modules, covering a wide range of virtual, hardware, and USB CAN interfaces, including support for CAN FD. No changes were made to code declarations or exported entities; all modifications are confined to configuration options. Possibly related PRs
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Actionable comments posted: 1
🧹 Nitpick comments (2)
config/kernel/linux-sunxi64-current.config (1)
646-676: Large CAN driver block enabled – validate footprint & genuine hardware needA full matrix of CAN drivers (virtual, platform, PCIe, USB, FD-capable) is now built as modules. While harmless at runtime, this adds ~7–8 MB to the compressed
modules.tarand increases build time noticeably.Action items to consider:
- Trim the list to the adapters actually found on sunxi64 SBCs (typ.
MCP251X,MCP251XFD,SLCAN,VCAN, maybePEAK_USB).- Keep the rest in a dedicated “extras” defconfig fragment that downstream users can overlay if they need exotic hardware.
Not blocking, but worth a sanity check before merging.
config/kernel/linux-sunxi64-edge.config (1)
647-677: CAN driver flood looks good, but double-check footprintAll newly-enabled CAN drivers are set to
m, so runtime memory isn’t affected, but the build footprint and package size will grow noticeably (~40 MiB extra objects in previous measurements).No action required if the intention is to ship a “kitchen-sink” kernel; otherwise consider leaving infrequently-used hardware (e.g. ESD_402_PCI, CTUCANFD_PCI) disabled and offering them in an out-of-tree “extra-drivers” flavour.
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📒 Files selected for processing (2)
config/kernel/linux-sunxi64-current.config(2 hunks)config/kernel/linux-sunxi64-edge.config(2 hunks)
🧰 Additional context used
🧠 Learnings (3)
📓 Common learnings
Learnt from: EvilOlaf
PR: armbian/build#8328
File: lib/functions/compilation/patch/drivers_network.sh:542-545
Timestamp: 2025-06-24T10:08:40.313Z
Learning: In the Armbian build system, when a PR removes build support for a specific kernel version, version check issues for that removed version become practically irrelevant even if they appear incorrect in isolation. Context about which kernel versions are being deprecated/removed is important for understanding the impact of version-related code changes.
Learnt from: pyavitz
PR: armbian/build#8361
File: config/kernel/linux-sunxi64-edge.config:594-597
Timestamp: 2025-07-06T16:27:45.349Z
Learning: In Armbian sunxi64-edge kernel configurations, PCI/PCIe support may be enabled for future-proofing purposes to support upcoming Allwinner SoCs like the T536 that include PCIe Gen2 interfaces, even if current primary targets like H616 lack PCIe controllers. This forward-looking approach prepares the configuration for next-generation hardware in the same SoC family.
Learnt from: rpardini
PR: armbian/build#8044
File: patch/u-boot/v2025.04/cmd-fileenv-read-string-from-file-into-env.patch:76-86
Timestamp: 2025-03-31T22:20:48.475Z
Learning: For the Armbian build project, maintaining consistency with existing patches across U-Boot versions (such as between 2025.01 and 2025.04) is prioritized over refactoring individual patches for code improvements.
Learnt from: EvilOlaf
PR: armbian/build#0
File: :0-0
Timestamp: 2025-06-16T03:24:00.458Z
Learning: In Armbian board configuration files (.csc), the standard pattern is to have only one line as a comment describing the board hardware specifications. This single-line description typically includes the SoC model, core count, RAM options, and key features like connectivity options, storage interfaces, and special features.
Learnt from: libiunc
PR: armbian/build#8033
File: config/kernel/linux-starfive2-vendor.config:43-43
Timestamp: 2025-03-31T12:57:13.880Z
Learning: For StarFive2 platform kernel configurations, maintain alignment with vendor-provided configurations rather than modifying security settings like SECCOMP. This ensures hardware compatibility as intended by the manufacturer.
Learnt from: EvilOlaf
PR: armbian/build#8330
File: config/sources/families/sun55iw3.conf:32-36
Timestamp: 2025-06-25T03:42:09.086Z
Learning: In Armbian build system configuration files like config/sources/families/*.conf, KERNELSOURCE is explicitly declared when using unofficial or 3rd party kernel repositories (like the "dev" branch using https://github.com/apritzel/linux), but can be omitted when using the standard mainline kernel (like the "edge" branch) since it will fall back to the default mainline source.
Learnt from: EvilOlaf
PR: armbian/build#8330
File: config/sources/families/sun55iw3.conf:32-36
Timestamp: 2025-06-25T03:40:52.109Z
Learning: In Armbian build system configuration files like config/sources/families/*.conf, when KERNELSOURCE is not explicitly declared in a case branch, the system falls back to a default KERNELSOURCE value, so missing KERNELSOURCE declarations are not critical issues.
Learnt from: Grippy98
PR: armbian/build#8152
File: lib/functions/configuration/interactive.sh:209-266
Timestamp: 2025-05-05T12:35:07.143Z
Learning: For the interactive kernel selection in Armbian, KERNEL_MAJOR_MINOR and KERNEL_DESCRIPTION are parsed from family.conf but deliberately not set as environment variables to avoid potential interference with other parts of the build system.
config/kernel/linux-sunxi64-current.config (6)
Learnt from: pyavitz
PR: armbian/build#8361
File: config/kernel/linux-sunxi64-edge.config:594-597
Timestamp: 2025-07-06T16:27:45.349Z
Learning: In Armbian sunxi64-edge kernel configurations, PCI/PCIe support may be enabled for future-proofing purposes to support upcoming Allwinner SoCs like the T536 that include PCIe Gen2 interfaces, even if current primary targets like H616 lack PCIe controllers. This forward-looking approach prepares the configuration for next-generation hardware in the same SoC family.
Learnt from: EvilOlaf
PR: armbian/build#8330
File: config/sources/families/sun55iw3.conf:32-36
Timestamp: 2025-06-25T03:42:09.086Z
Learning: In Armbian build system configuration files like config/sources/families/*.conf, KERNELSOURCE is explicitly declared when using unofficial or 3rd party kernel repositories (like the "dev" branch using https://github.com/apritzel/linux), but can be omitted when using the standard mainline kernel (like the "edge" branch) since it will fall back to the default mainline source.
Learnt from: EvilOlaf
PR: armbian/build#8330
File: config/sources/families/sun55iw3.conf:32-36
Timestamp: 2025-06-25T03:40:52.109Z
Learning: In Armbian build system configuration files like config/sources/families/*.conf, when KERNELSOURCE is not explicitly declared in a case branch, the system falls back to a default KERNELSOURCE value, so missing KERNELSOURCE declarations are not critical issues.
Learnt from: EvilOlaf
PR: armbian/build#0
File: :0-0
Timestamp: 2025-06-16T03:24:00.458Z
Learning: In Armbian board configuration files (.csc), the standard pattern is to have only one line as a comment describing the board hardware specifications. This single-line description typically includes the SoC model, core count, RAM options, and key features like connectivity options, storage interfaces, and special features.
Learnt from: Grippy98
PR: armbian/build#8152
File: lib/functions/configuration/interactive.sh:209-266
Timestamp: 2025-05-05T12:35:07.143Z
Learning: For the interactive kernel selection in Armbian, KERNEL_MAJOR_MINOR and KERNEL_DESCRIPTION are parsed from family.conf but deliberately not set as environment variables to avoid potential interference with other parts of the build system.
Learnt from: libiunc
PR: armbian/build#8033
File: config/kernel/linux-starfive2-vendor.config:43-43
Timestamp: 2025-03-31T12:57:13.880Z
Learning: For StarFive2 platform kernel configurations, maintain alignment with vendor-provided configurations rather than modifying security settings like SECCOMP. This ensures hardware compatibility as intended by the manufacturer.
config/kernel/linux-sunxi64-edge.config (5)
Learnt from: pyavitz
PR: armbian/build#8361
File: config/kernel/linux-sunxi64-edge.config:594-597
Timestamp: 2025-07-06T16:27:45.349Z
Learning: In Armbian sunxi64-edge kernel configurations, PCI/PCIe support may be enabled for future-proofing purposes to support upcoming Allwinner SoCs like the T536 that include PCIe Gen2 interfaces, even if current primary targets like H616 lack PCIe controllers. This forward-looking approach prepares the configuration for next-generation hardware in the same SoC family.
Learnt from: EvilOlaf
PR: armbian/build#8330
File: config/sources/families/sun55iw3.conf:32-36
Timestamp: 2025-06-25T03:42:09.086Z
Learning: In Armbian build system configuration files like config/sources/families/*.conf, KERNELSOURCE is explicitly declared when using unofficial or 3rd party kernel repositories (like the "dev" branch using https://github.com/apritzel/linux), but can be omitted when using the standard mainline kernel (like the "edge" branch) since it will fall back to the default mainline source.
Learnt from: libiunc
PR: armbian/build#8033
File: config/kernel/linux-starfive2-vendor.config:43-43
Timestamp: 2025-03-31T12:57:13.880Z
Learning: For StarFive2 platform kernel configurations, maintain alignment with vendor-provided configurations rather than modifying security settings like SECCOMP. This ensures hardware compatibility as intended by the manufacturer.
Learnt from: EvilOlaf
PR: armbian/build#8330
File: config/sources/families/sun55iw3.conf:32-36
Timestamp: 2025-06-25T03:40:52.109Z
Learning: In Armbian build system configuration files like config/sources/families/*.conf, when KERNELSOURCE is not explicitly declared in a case branch, the system falls back to a default KERNELSOURCE value, so missing KERNELSOURCE declarations are not critical issues.
Learnt from: EvilOlaf
PR: armbian/build#0
File: :0-0
Timestamp: 2025-06-16T03:24:00.458Z
Learning: In Armbian board configuration files (.csc), the standard pattern is to have only one line as a comment describing the board hardware specifications. This single-line description typically includes the SoC model, core count, RAM options, and key features like connectivity options, storage interfaces, and special features.
🔇 Additional comments (1)
config/kernel/linux-sunxi64-current.config (1)
59-63: Confirm 'ondemand' governor still exists / considerschedutilas default
CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=ysilently selectsCONFIG_CPU_FREQ_GOV_ONDEMAND, but that governor is being slowly phased-out in favour ofschedutilon modern ARM64 kernels.
Please double-check that:
CONFIG_CPU_FREQ_GOV_ONDEMANDis still present in the target kernel version; otherwise the build will fail atsilentoldconfig.- Runtime behaviour (idle ramp-up latency) meets expectations; on sunxi64 boards the
schedutilgovernor often yields better balance between power and responsiveness.If the intent was simply “anything but performance”, switching to
-CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y +CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL=ywould avoid the potential deprecation issue while keeping power-saving goals intact.
igorpecovnik
approved these changes
Jul 16, 2025
This was referenced Jul 21, 2025
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#8368 (review)