Jerome,

On Tue, May 30, 2023 at 06:14:01PM +0200, Jerome Brunet wrote:

On Wed 17 May 2023 at 16:33, Dmitry Rokosov [off-list ref] wrote:

quoted

A1 SoC has four clock controllers on the board: PLL, Peripherals, CPU,
and Audio. The audio clock controller is different from others, but the
rest are very similar from a functional and regmap point of view.
This patch series add support for Amlogic A1 PLL and Peripherals clock
drivers.
It blocks all A1 peripherals mainline support and a couple of patch series,
which were already reviewed and acked, but weren't merged due to pending
clock controller drivers series, e.g.
https://lore.kernel.org/all/20230418111612.19479-1-ddrokosov@sberdevices.ru/ (local)

TODO: CPU and Audio clock controllers are not included in this patch
series, it will be sent later. The following clks from these controllers
are not supported for now:
* Audio clks - vad, mclk_vad, mclk_d, resample_a, locker_in, mclk_b,
   pdmdclk, pdmsysclk, eqdrc, spdifin, mclk_a, audio2_toaudiotop,
   audio2_tovad, audio2_toddr_vad, audio2_tdmin_vad, audio2_pdm,
   audio2_ddr_arb, audio_audiolocker, audio_eqdrc, audio_resamplea,
   audio_spdifin, audio_toddrb, audio_toddra, audio_frddrb, audio_frddra,
   audio_tdmoutb, audio_tdmouta, audio_loopbacka, audio_tdminlb,
   audio_tdminb, audio_tdmina, audio_ddr_arb, mclk_c

* CPU clks: cpu_fixed_source_sel0, cpu_fixed_source_div0,
            cpu_fixed_source_sel1, cpu_fixed_source_div1, cpu_clk

Validation:
* to double check all clk flags run below helper script:
    pushd /sys/kernel/debug/clk
    for f in *; do
        if [[ -f "$f/clk_flags" ]]; then
            flags="$(cat $f/clk_flags | awk '{$1=$1};1' | sed ':a;N;$!ba;s/\n/ | /g')"
            echo -e "$f: $flags"
        fi
    done
    popd

* to trace current clks state use '/sys/kernel/debug/clk/clk_dump' node
  with jq post-processing:
    $ cat /sys/kernel/debug/clk/clk_dump | jq '.' > clk_dump.json

* to debug clk rate propagation, compile kernel with the following
  definition:
    $ sed -i "s/undef CLOCK_ALLOW_WRITE_DEBUGFS/define CLOCK_ALLOW_WRITE_DEBUGFS/g" drivers/clk/clk.c
  after that, clk_rate debug node for each clock will be available for
  write operation

Applied, Thx

Thank you very much!

I noticed that you have applied version 15 of the patch. If I understand
correctly, this is because CLK_SET_RATE_NO_REPARENT for all RTC children
is preferred from your perspective. I agree with this decision. However,
version 16 includes a small refactoring patch that corrects a
misstyping by changing all sys_* related dividers and gates to
read-only operations, since they are set up from BootROM. Should I
submit this patch separately at a later time?

Also could you please clarify the official process for handling these
patches? Currently, I don't see them in the linux-amlogic for-next
branches. Is there a separate repository for clock changes? I believe
the next repository is a fork of the clock framework, but unfortunately,
I cannot seem to locate it on git.kernel.org... Apologies for the
potentially simple questions...

-- 
Thank you,
Dmitry

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