linux-toradex.git/drivers/memory/tegra/tegra20-emc.c, branch v5.17-rc5

memory: tegra20-emc: Add runtime dependency on devfreq governor module

2021-10-21T09:18:08+00:00

Tegra20 EMC driver uses simple devfreq governor. Add simple devfreq
governor to the list of the Tegra20 EMC driver module softdeps to allow
userspace initramfs tools like dracut to automatically pull the devfreq
module into ramfs image together with the EMC module.

Reported-by: Nicolas Chauvet 
Suggested-by: Nicolas Chauvet 
Signed-off-by: Dmitry Osipenko 
Link: https://lore.kernel.org/r/20211019231524.888-1-digetx@gmail.com
Signed-off-by: Krzysztof Kozlowski

memory: tegra20-emc: Support matching timings by LPDDR2 configuration

2021-10-15T07:52:47+00:00

ASUS Transformer TF101 doesn't provide RAM code and in this case memory
timings should be selected based on identity information read out from
SDRAM chip. Support matching timings by LPDDR2 configuration.

Signed-off-by: Dmitry Osipenko 
Link: https://lore.kernel.org/r/20211006224659.21434-10-digetx@gmail.com
Signed-off-by: Krzysztof Kozlowski

memory: tegra: Delete dead debugfs checking code

2021-06-10T07:18:15+00:00

The debugfs_create_dir() function does not return NULL, it returns error
pointers.  But in normal situations like this where the caller is not
dereferencing "emc->debugfs.root" then we are not supposed to check the
return.  So instead of fixing these checks, we should delete them.

Signed-off-by: Dan Carpenter 
Link: https://lore.kernel.org/r/YMCQDTSyG8UuQoh0@mwanda
Signed-off-by: Krzysztof Kozlowski

memory: tegra20-emc: Use devm_tegra_core_dev_init_opp_table()

2021-06-03T12:24:03+00:00

Use common devm_tegra_core_dev_init_opp_table() helper for the OPP table
initialization.

Tested-by: Paul Fertser  # PAZ00 T20
Tested-by: Nicolas Chauvet  # PAZ00 T20
Reviewed-by: Krzysztof Kozlowski 
Signed-off-by: Dmitry Osipenko 
Signed-off-by: Thierry Reding

memory: tegra: Print out info-level once per driver probe

2021-04-01T17:58:22+00:00

Probing of EMC drivers may be deferred and in this case we get duplicated
info messages during kernel boot. Use dev_info_once() helper to silence
the duplicated messages.

Signed-off-by: Dmitry Osipenko 
Link: https://lore.kernel.org/r/20210330230445.26619-7-digetx@gmail.com
Signed-off-by: Krzysztof Kozlowski

memory: tegra: Remove calls to dev_pm_opp_set_clkname()

2021-01-29T06:59:01+00:00

There is no point calling dev_pm_opp_set_clkname() with the "name"
parameter set to NULL, this is already done by the OPP core at setup
time and should work as it is.

Signed-off-by: Viresh Kumar 
Reviewed-by: Dmitry Osipenko 
Tested-by: Dmitry Osipenko 
Link: https://lore.kernel.org/r/0f22cc1791d8b88c50a9790c2dc19455b34ec7b0.1611742564.git.viresh.kumar@linaro.org
Signed-off-by: Krzysztof Kozlowski

memory: tegra20: Support hardware versioning and clean up OPP table initialization

2020-12-05T13:53:59+00:00

Support hardware versioning, which is now required for Tegra20 EMC OPP.
Clean up OPP table initialization by using a error code returned by OPP
API for judging about the OPP table presence in a device-tree and remove
OPP regulator initialization because we're now going to use power domain
instead of a raw regulator. This puts Tegra20 EMC OPP preparation on par
with the Tegra30/124 EMC drivers.

Signed-off-by: Dmitry Osipenko 
Acked-by: Thierry Reding 
Link: https://lore.kernel.org/r/20201203192439.16177-3-digetx@gmail.com
Signed-off-by: Krzysztof Kozlowski

memory: tegra20-emc: Add devfreq support

2020-11-26T17:50:36+00:00

Add devfreq support to the Tegra20 EMC driver. Memory utilization
statistics will be periodically polled from the memory controller and
appropriate minimum clock rate will be selected by the devfreq governor.

Signed-off-by: Dmitry Osipenko 
Reviewed-by: Chanwoo Choi 
Link: https://lore.kernel.org/r/20201111011456.7875-5-digetx@gmail.com
Signed-off-by: Krzysztof Kozlowski

memory: tegra20-emc: Remove IRQ number from error message

2020-11-26T17:50:36+00:00

Remove IRQ number from error message since it doesn't add any useful
information, especially because this number is virtual.

Signed-off-by: Dmitry Osipenko 
Link: https://lore.kernel.org/r/20201111011456.7875-6-digetx@gmail.com
Signed-off-by: Krzysztof Kozlowski

memory: tegra20-emc: Factor out clk initialization

2020-11-26T17:50:36+00:00

Factor out clk initialization and make it resource-managed. This makes
easier to follow code and will help to make further changes cleaner.

Signed-off-by: Dmitry Osipenko 
Link: https://lore.kernel.org/r/20201111011456.7875-4-digetx@gmail.com
Signed-off-by: Krzysztof Kozlowski