Hello,
I tried to utilize the Tegra devfreq driver on Tegra30 and found out that
it doesn't work properly due to improper Hz<->kHz conversions made by the
driver. After fixing that problem and doing some more testing I noticed
that there are things that could be improved and in result here is this
patchset that fixes the problems, makes some improvements and adds support
for NVIDIA Tegra30 SoC's. This series was tested on Tegra30 and Tegra124
machines.
This series also adds support for the Tegra20 SoC's that do not have
the ACTMON hardware unit, but can use Memory Controller counters to make
decision about the required memory frequency. Please note that the patch
that instantiates a platform device for the driver isn't a part of this
series, I'll submit it later on because of interdependency with some other
ongoing patchset.
Please review, thanks.
Changelog:
v2: The patchset was quite heavily reworked since v1, few patches we
dropped or squashed into the new ones and more patches we added.
In a result more bugs and potential problems are fixed now, driver's
code got more clean up.
The Tegra20 driver-addition patch is now a part of this series, it has
no changes since v1.
Dmitry Osipenko (19):
PM / devfreq: tegra: Fix kHz to Hz conversion
PM / devfreq: tegra: Replace readl-writel with relaxed versions
PM / devfreq: tegra: Don't ignore clk errors
PM / devfreq: tegra: Don't set EMC clock rate to maximum on probe
PM / devfreq: tegra: Replace write memory barrier with the read
barrier
PM / devfreq: tegra: Fix missed error checking on devfreq
initialization failure
PM / devfreq: tegra: Register clk notifier in the end of driver's
probe
PM / devfreq: tegra: Remove OPP entries on driver removal
PM / devfreq: tegra: Change interrupt request order
PM / devfreq: tegra: Drop primary interrupt handler
PM / devfreq: tegra: De-initialize properly on driver's probe error
PM / devfreq: tegra: Avoid inconsistency of current frequency value
PM / devfreq: tegra: Mark ACTMON's governor as immutable
PM / devfreq: tegra: Move governor registration to driver's probe
PM / devfreq: tegra: Synchronize IRQ after masking it in hardware
PM / devfreq: tegra: Reconfigure hardware on governor's restart
PM / devfreq: tegra: Support Tegra30
PM / devfreq: tegra: Enable COMPILE_TEST for the driver
PM / devfreq: Introduce driver for NVIDIA Tegra20
MAINTAINERS | 8 +
drivers/devfreq/Kconfig | 15 +-
drivers/devfreq/Makefile | 1 +
drivers/devfreq/tegra-devfreq.c | 296 +++++++++++++-----------------
drivers/devfreq/tegra20-devfreq.c | 177 ++++++++++++++++++
5 files changed, 324 insertions(+), 173 deletions(-)
create mode 100644 drivers/devfreq/tegra20-devfreq.c
--
2.21.0
