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Enable LP2 CPUIDLE state on NVIDIA Tegra30

Dmitry Osipenko linux-pm linux-tegra lkml 1 version Applied

Status from this message: Applied to for-5.8/arm/core, thanks.

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Versions newest first

  1. v1 Latest3 patches 5 repliesApplied

Patches in v1 Applied

#Subject and filesSizeRepliesApplied
1/3ARM: tegra: Initialize r0 register for firmware wake-uparch/arm/mach-tegra/reset-handler.S+6 -11 reply
2/3firmware: trusted_foundations: Different way of L2 cache enabling after LP2 suspendarch/arm/mach-tegra/pm.c drivers/firmware/trusted_foundations.c include/linux/firmware/trusted_foundations.h+24 -21 reply
3/3cpuidle: tegra: Support CPU cluster power-down state on Tegra30drivers/cpuidle/cpuidle-tegra.c+0 -13 replies

Reviews trailers per patch

1 of 3 patches has a Reviewed-by or Acked-by.

PatchMichał MirosławJasper KortenDavid HeidelbergPeter GeisDaniel Lezcano
1/3T-b T-b T-b T-b
2/3T-b T-b T-b T-b
3/3T-b T-b T-b T-b A-b

Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes. Scroll the table sideways for all 5 reviewers.

Read the v1 thread

Cover letter [PATCH v1 0/3] Enable LP2 CPUIDLE state on NVIDIA Tegra30

Hello,

This series enables LP2 CPU idling state on Tegra30. Previously, Michał Mirosław reported that this wasn't working on ASUS Transformer device and we found that replicating the Transformer's downstream kernel behavior (in regards to the firmware) helps. Later on Michał told that LP2 works without the firmware changes using a different kernel version / config, we don't know for sure what was the cause of the original problem.

This series makes the TF firmware changes that are known to work well in regards to LP2 idling on all devices and then the LP2 idling state is enabled.

Please review and apply, thanks in advance.

Dmitry Osipenko (3):
ARM: tegra: Initialize r0 register for firmware wake-up
firmware: trusted_foundations: Different way of L2 cache enabling
after LP2 suspend
cpuidle: tegra: Support CPU cluster power-down state on Tegra30

 arch/arm/mach-tegra/pm.c                     |  4 ++++
 arch/arm/mach-tegra/reset-handler.S          |  7 ++++++-
 drivers/cpuidle/cpuidle-tegra.c              |  1 -
 drivers/firmware/trusted_foundations.c       | 21 ++++++++++++++++++--
 include/linux/firmware/trusted_foundations.h |  1 +
 5 files changed, 30 insertions(+), 4 deletions(-)
Signature · 1 line
2.25.1