[PATCH v6 00/12] NVIDIA Tegra20 CPUFreq driver major update

Dmitry Osipenko
2019-12-18T20:22:01Z

Hello,

This series moves intermediate-clk handling from tegra20-cpufreq into
tegra-clk driver. This allows us to switch to generic cpufreq-dt driver
which brings voltage scaling, per-hardware OPPs and Tegra30 support out
of the box. All boards need to adopt CPU OPPs in their device-trees in
order to get cpufreq support.

Changelog:

v6: - Dropped "cpufreq: dt-platdev: Blacklist NVIDIA Tegra20 and Tegra30 SoCs"
patch from the series since Viresh picked up that patch separately.

- Added two new patches to this series:

ARM: tegra: Switch CPU to PLLP on resume from LP1 on Tegra30/114/124
ARM: tegra: Don't enable PLLX while resuming from LP1 on Tegra30

Previously these patches were sent out separately from this series,
but it should be more consistent to include them into the series since
they directly relate to enabling of the cpufreq driver on Tegra30.

v5: - The "Use generic cpufreq-dt driver (Tegra30 supported now)" patch
is separated now into two patches by factoring out the blacklisting
of cpufreq-dt-platdev into a standalone patch. This is done in a
response to request from Jon Hunter to fix the warning splats during
boot that are coming from OPP core because OPPs are unavailable. The
OPPs will become available once tegra20-cpufreq driver will be updated
to support the cpufreq-dt.

v4: - Updated CCLK diagram in the "Add custom CCLK implementation" patch.

- <linux/cpu.h> is now included in the "Use generic cpufreq-dt driver"
patch, for consistency.

- Returned value of get_cpu_device() is now checked in the "Use generic
cpufreq-dt driver" patch, for consistency as well.

v3: - The "Add custom CCLK implementation" patch was updated in accordance
to the comments from Peter De Schrijver. We will not use the clock
skipper.

- Re added OPPs for T30 Beaver board because Thierry has that board ;)

- Added r-b for the "DT binding" patch from Rob Herring.

v2: - Kept modularity of the tegra20-cpufreq as was requested by Viresh Kumar
in a review comment to v1.

- Added acks from Viresh Kumar.

- Added tested-by from Nicolas Chauvet to the "trimslice" patch.
Nicolas told me on IRC that it works fine.

- Fixed compilation of the "Add custom CCLK implementation" patch. The
error happened because v1 was based on top of yet unreviewed/unapplied
patch "clk: tegra: divider: Support enable-bit for Super clocks".
Thanks to Peter Geis for reporting the problem.

- Replaced Tegra30 "beaver" board with "cardhu-a04" because turned out
that's what NVIDIA uses in the testing farm.

Dmitry Osipenko (12):
clk: tegra: Add custom CCLK implementation
clk: tegra: pll: Add pre/post rate-change hooks
clk: tegra: cclk: Add helpers for handling PLLX rate changes
clk: tegra20: Use custom CCLK implementation
clk: tegra30: Use custom CCLK implementation
ARM: tegra: Switch CPU to PLLP on resume from LP1 on Tegra30/114/124
ARM: tegra: Don't enable PLLX while resuming from LP1 on Tegra30
dt-bindings: cpufreq: Add binding for NVIDIA Tegra20/30
cpufreq: tegra20: Use generic cpufreq-dt driver (Tegra30 supported
now)
ARM: tegra: Create tegra20-cpufreq platform device on Tegra30
ARM: dts: tegra30: beaver: Set up voltage regulators for DVFS
ARM: dts: tegra30: beaver: Add CPU Operating Performance Points

.../cpufreq/nvidia,tegra20-cpufreq.txt | 56 +++++
arch/arm/boot/dts/tegra30-beaver.dts | 40 +++-
arch/arm/mach-tegra/sleep-tegra30.S | 18 +-
arch/arm/mach-tegra/tegra.c | 4 +
drivers/clk/tegra/Makefile | 1 +
drivers/clk/tegra/clk-pll.c | 12 +-
drivers/clk/tegra/clk-tegra-super-cclk.c | 212 +++++++++++++++++
drivers/clk/tegra/clk-tegra20.c | 7 +-
drivers/clk/tegra/clk-tegra30.c | 6 +-
drivers/clk/tegra/clk.h | 19 +-
drivers/cpufreq/Kconfig.arm | 6 +-
drivers/cpufreq/tegra20-cpufreq.c | 217 +++++-------------
12 files changed, 418 insertions(+), 180 deletions(-)
create mode 100644 Documentation/devicetree/bindings/cpufreq/nvidia,tegra20-cpufreq.txt
create mode 100644 drivers/clk/tegra/clk-tegra-super-cclk.c

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2.24.0