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Subject[PATCH v2 0/6] Consolidate and improve NVIDIA Tegra CPUIDLE driver(s)
Date
Hello,

I was spending quite some time recently trying to hunt down CPU-suspend
bug on Tegra30 SoC and in the end it was nailed. During that time I
realized that the CPU Idle drivers could get some polish and gain new
features, thus that's what this series does:

1. Unifies Tegra20/30/114 drivers into a single driver and moves it out
into common drivers/cpuidle/ directory.

2. Enables CPU cluster power-down idling state on Tegra30.

In the end there is a quite nice clean up of the Tegra CPUIDLE driver(s)
and of the Tegra's arch code in general. Please review, thanks!

Changelog:

v2: - Added patches to enable the new cpuidle driver in the defconfigs:

ARM: multi_v7_defconfig: Enable Tegra cpuidle driver
ARM: tegra: Enable Tegra cpuidle driver in tegra_defconfig

- Dropped patches that removed CPUIDLE_FLAG_TIMER_STOP from the idling
states because that flag actually doesn't have any negative effects,
but still is correct for the case of a local CPU timer on older Tegra
SoCs:

cpuidle: tegra: Remove CPUIDLE_FLAG_TIMER_STOP from Tegra114/124 idle-state
cpuidle: tegra: Remove CPUIDLE_FLAG_TIMER_STOP from all states

- The "Add unified driver for NVIDIA Tegra SoCs" patch got more polish.
Tegra30 and Terga114 states are now squashed into a single common C7
state (following Parker TRM terminology, see 17.2.2.2 Power Management
States), more comments added, etc minor changes.

Dmitry Osipenko (6):
ARM: tegra: Remove cpuidle drivers
ARM: tegra: Expose functions required for cpuidle driver
cpuidle: Add unified driver for NVIDIA Tegra SoCs
cpuidle: tegra: Support CPU cluster power-down on Tegra30
ARM: multi_v7_defconfig: Enable Tegra cpuidle driver
ARM: tegra: Enable Tegra cpuidle driver in tegra_defconfig

arch/arm/configs/multi_v7_defconfig | 1 +
arch/arm/configs/tegra_defconfig | 1 +
arch/arm/mach-tegra/Makefile | 15 +-
arch/arm/mach-tegra/cpuidle-tegra114.c | 89 --------
arch/arm/mach-tegra/cpuidle-tegra20.c | 212 -----------------
arch/arm/mach-tegra/cpuidle-tegra30.c | 132 -----------
arch/arm/mach-tegra/cpuidle.c | 50 ----
arch/arm/mach-tegra/cpuidle.h | 21 --
arch/arm/mach-tegra/irq.c | 18 --
arch/arm/mach-tegra/irq.h | 11 -
arch/arm/mach-tegra/platsmp.c | 2 -
arch/arm/mach-tegra/pm.c | 27 +--
arch/arm/mach-tegra/pm.h | 4 -
arch/arm/mach-tegra/reset-handler.S | 11 -
arch/arm/mach-tegra/reset.h | 9 +-
arch/arm/mach-tegra/sleep-tegra20.S | 190 +---------------
arch/arm/mach-tegra/sleep.h | 13 --
arch/arm/mach-tegra/tegra.c | 7 +-
drivers/cpuidle/Kconfig.arm | 8 +
drivers/cpuidle/Makefile | 1 +
drivers/cpuidle/cpuidle-tegra.c | 303 +++++++++++++++++++++++++
drivers/soc/tegra/Kconfig | 1 -
include/linux/clk/tegra.h | 13 ++
include/soc/tegra/cpuidle.h | 2 +-
include/soc/tegra/pm.h | 28 +++
25 files changed, 375 insertions(+), 794 deletions(-)
delete mode 100644 arch/arm/mach-tegra/cpuidle-tegra114.c
delete mode 100644 arch/arm/mach-tegra/cpuidle-tegra20.c
delete mode 100644 arch/arm/mach-tegra/cpuidle-tegra30.c
delete mode 100644 arch/arm/mach-tegra/cpuidle.c
delete mode 100644 arch/arm/mach-tegra/cpuidle.h
delete mode 100644 arch/arm/mach-tegra/irq.h
create mode 100644 drivers/cpuidle/cpuidle-tegra.c

--
2.22.0

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