(subset) [PATCH 0/4] arm64: amlogic: t7: describe the VIM4 supplies and keep the fabric clocks running

[Neil Armstrong]

Hi,

On Sat, 29 Aug 2026 10:47:54 +0100, Lucas Tanure wrote:
> The Khadas VIM4 has needed clk_ignore_unused to boot reliably. Without it
> the board hangs at random, loses storage and corrupts memory, and the
> failures move around from boot to boot.
> 
> Six of the SoC's PWM outputs drive the board's voltage regulators: the
> always-on domain, both CPU clusters, the GPU, the NPU and the DRAM. None
> of them were described, so Linux saw the outputs as unused and switched
> them off about a second into boot. The regulators then drifted away from
> the levels the bootloader had set, which is where the corruption and the
> random hangs came from.
> Thanks to Chuan Liu from Amlogic for helping me indetify which clocks are
> critical.
> 
> [...]

Thanks, Applied to https://git.kernel.org/pub/scm/linux/kernel/git/amlogic/linux.git (v7.3/fixes)

[2/4] arm64: dts: amlogic: t7: fix the pin groups of two PWM outputs
      https://git.kernel.org/amlogic/c/ae7be5c58a819259e5eb98a3abfa60842478f2ae
[3/4] arm64: dts: amlogic: t7: khadas-vim4: add the PWM-driven supplies
      https://git.kernel.org/amlogic/c/1e5a53bd16ac501e68463e84023d1bff543cc696
[4/4] arm64: dts: amlogic: t7: fix the pin groups of the vsync PWM
      https://git.kernel.org/amlogic/c/406292fd75f95aa3010fec95b5beb5a8b7e3ba3a

These changes has been applied on the intermediate git tree [1].

The v7.3/fixes branch will then be sent via a formal Pull Request to the Linux SoC maintainers
for inclusion in their intermediate git branches in order to be sent to Linus during
the next merge window, or sooner if it's a set of fixes.

In the cases of fixes, those will be merged in the current release candidate
kernel and as soon they appear on the Linux master branch they will be
backported to the previous Stable and Long-Stable kernels [2].

The intermediate git branches are merged daily in the linux-next tree [3],
people are encouraged testing these pre-release kernels and report issues on the
relevant mailing-lists.

If problems are discovered on those changes, please submit a signed-off-by revert
patch followed by a corrective changeset.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/amlogic/linux.git
[2] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
[3] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git

-- 
Neil