[0/7] regulator: Set PROBE_PREFER_ASYNCHRONOUS for everything in drivers/regulator

  This series directly follows from the discussion when I tried to turn
on PROBE_PREFER_ASYNCHRONOUS just for the fixed-regulator [1] and
attempts to switch everything in drivers/regulator over to async
probe.

Like the similar patch series I did for the MMC subsystem a few years
ago [2], I've split this patch series into batches corresponding to
drivers corresponding to actively maintained stable kernel trees with
the idea to break the patch series up somewhat.

Most of the description of this series is contained in the first patch
of the series and then the further patches simply refer back to the
first one. The logic and reasoning behind all the patches is exactly
the same.

As talked about in the first patch, it wouldn't be at all shocking if
this broke someone. Hopefully this doesn't cause too much of a
problem. Most of the problems expected would be real underlying bugs
that already existed and were just tickled by this change. If you're
facing a problem, it's fairly easy to force individual drivers back to
"synchronous" probing while the problem is tracked down and fixed.

I am opting _not_ to CC every single person involved in each of these
regulators on this patch series because I suspect that the mailing
lists couldn't handle CCing that many people. This should be on LKML
so hopefully people can find it there and respond to it that
way. Anyone who responds will get CCed on future versions, if there
are any.

For reference, the ugly script I used is here:
  import os
  import re

  for filename in os.listdir("."):
      found_subsys = False
      found_driver = False
      output = []
      for line in open(filename, "r").readlines():
          if "struct platform_driver" in line or \
             "struct i2c_driver" in line or \
             "struct spmi_driver" in line or \
             "struct spi_driver" in line:
              found_subsys = True
          if found_subsys and re.search(r"\t\.driver\s*=\s*{", line):
              found_driver = True
              found_subsys = False
          mo = re.search(r"(\s*)\.name(\s*)=", line)
          if found_driver and mo:
              if not line.endswith(",\n"):
                  line = line[:-1] + ",\n"
              output.append(line)

              if mo.group(2) == " ":
                  space = " "
              elif mo.group(2) == "\t":
                  # Best we can do
                  space = " "
              elif mo.group(2).startswith("\t"):
                  # Guess that removing one tab is right
                  space = mo.group(2)[1:]
              else:
                  # Guess it's all spaces
                  space = mo.group(2)[7:] + " "

              output.append("%s.probe_type%s= PROBE_PREFER_ASYNCHRONOUS,\n" % (mo.group(1), space))
              found_driver = False
          else:
              output.append(line)

      open(filename, "w").write("".join(output))

I manually split drivers up into groups based on the kernel they were
introduced in.

I've run a compile test against "allyesconfig" on amd64, arm32, and
arm64 with this and confirmed it compiled. I've booted this on a
sc7180-trogdor-lazor board and confirmed it booted OK and got the boot
speed improvements I expected and that dmesg was as expected.

[1] https://lore.kernel.org/r/06db017f-e985-4434-8d1d-02ca2100cca0@sirena.org.uk
[2] https://lore.kernel.org/r/20200903232441.2694866-1-dianders@chromium.org/


Douglas Anderson (7):
  regulator: Set PROBE_PREFER_ASYNCHRONOUS for drivers that existed in
    4.14
  regulator: Set PROBE_PREFER_ASYNCHRONOUS for drivers between 4.14 and
    4.19
  regulator: Set PROBE_PREFER_ASYNCHRONOUS for drivers between 4.19 and
    5.4
  regulator: Set PROBE_PREFER_ASYNCHRONOUS for drivers between 5.4 and
    5.10
  regulator: Set PROBE_PREFER_ASYNCHRONOUS for drivers between 5.10 and
    5.15
  regulator: Set PROBE_PREFER_ASYNCHRONOUS for drivers between 5.15 and
    6.1
  regulator: Set PROBE_PREFER_ASYNCHRONOUS for drivers that are newer
    than 6.1

 drivers/regulator/88pg86x.c                    | 1 +
 drivers/regulator/88pm800-regulator.c          | 1 +
 drivers/regulator/88pm8607.c                   | 1 +
 drivers/regulator/aat2870-regulator.c          | 1 +
 drivers/regulator/ab8500-ext.c                 | 1 +
 drivers/regulator/ab8500.c                     | 1 +
 drivers/regulator/act8865-regulator.c          | 1 +
 drivers/regulator/act8945a-regulator.c         | 1 +
 drivers/regulator/ad5398.c                     | 1 +
 drivers/regulator/anatop-regulator.c           | 1 +
 drivers/regulator/arizona-ldo1.c               | 2 ++
 drivers/regulator/arizona-micsupp.c            | 2 ++
 drivers/regulator/as3711-regulator.c           | 1 +
 drivers/regulator/as3722-regulator.c           | 1 +
 drivers/regulator/atc260x-regulator.c          | 1 +
 drivers/regulator/axp20x-regulator.c           | 1 +
 drivers/regulator/bcm590xx-regulator.c         | 1 +
 drivers/regulator/bd71815-regulator.c          | 1 +
 drivers/regulator/bd71828-regulator.c          | 3 ++-
 drivers/regulator/bd718x7-regulator.c          | 1 +
 drivers/regulator/bd9571mwv-regulator.c        | 1 +
 drivers/regulator/bd9576-regulator.c           | 1 +
 drivers/regulator/cpcap-regulator.c            | 1 +
 drivers/regulator/cros-ec-regulator.c          | 1 +
 drivers/regulator/da903x-regulator.c           | 1 +
 drivers/regulator/da9052-regulator.c           | 1 +
 drivers/regulator/da9055-regulator.c           | 1 +
 drivers/regulator/da9062-regulator.c           | 1 +
 drivers/regulator/da9063-regulator.c           | 1 +
 drivers/regulator/da9121-regulator.c           | 1 +
 drivers/regulator/da9210-regulator.c           | 1 +
 drivers/regulator/da9211-regulator.c           | 1 +
 drivers/regulator/db8500-prcmu.c               | 1 +
 drivers/regulator/dummy.c                      | 1 +
 drivers/regulator/fan53555.c                   | 1 +
 drivers/regulator/fan53880.c                   | 1 +
 drivers/regulator/fixed.c                      | 1 +
 drivers/regulator/gpio-regulator.c             | 1 +
 drivers/regulator/hi6421-regulator.c           | 1 +
 drivers/regulator/hi6421v530-regulator.c       | 1 +
 drivers/regulator/hi6421v600-regulator.c       | 1 +
 drivers/regulator/hi655x-regulator.c           | 1 +
 drivers/regulator/isl6271a-regulator.c         | 1 +
 drivers/regulator/isl9305.c                    | 1 +
 drivers/regulator/lm363x-regulator.c           | 1 +
 drivers/regulator/lochnagar-regulator.c        | 1 +
 drivers/regulator/lp3971.c                     | 1 +
 drivers/regulator/lp3972.c                     | 1 +
 drivers/regulator/lp872x.c                     | 1 +
 drivers/regulator/lp873x-regulator.c           | 1 +
 drivers/regulator/lp8755.c                     | 1 +
 drivers/regulator/lp87565-regulator.c          | 1 +
 drivers/regulator/lp8788-buck.c                | 1 +
 drivers/regulator/lp8788-ldo.c                 | 2 ++
 drivers/regulator/ltc3589.c                    | 1 +
 drivers/regulator/ltc3676.c                    | 1 +
 drivers/regulator/max14577-regulator.c         | 1 +
 drivers/regulator/max1586.c                    | 1 +
 drivers/regulator/max20086-regulator.c         | 1 +
 drivers/regulator/max20411-regulator.c         | 1 +
 drivers/regulator/max597x-regulator.c          | 1 +
 drivers/regulator/max77620-regulator.c         | 1 +
 drivers/regulator/max77650-regulator.c         | 1 +
 drivers/regulator/max77686-regulator.c         | 1 +
 drivers/regulator/max77693-regulator.c         | 1 +
 drivers/regulator/max77802-regulator.c         | 1 +
 drivers/regulator/max77826-regulator.c         | 1 +
 drivers/regulator/max8649.c                    | 1 +
 drivers/regulator/max8660.c                    | 1 +
 drivers/regulator/max8893.c                    | 1 +
 drivers/regulator/max8907-regulator.c          | 1 +
 drivers/regulator/max8925-regulator.c          | 1 +
 drivers/regulator/max8952.c                    | 1 +
 drivers/regulator/max8973-regulator.c          | 1 +
 drivers/regulator/max8997-regulator.c          | 1 +
 drivers/regulator/max8998.c                    | 1 +
 drivers/regulator/mc13783-regulator.c          | 1 +
 drivers/regulator/mc13892-regulator.c          | 1 +
 drivers/regulator/mcp16502.c                   | 1 +
 drivers/regulator/mp5416.c                     | 1 +
 drivers/regulator/mp8859.c                     | 1 +
 drivers/regulator/mp886x.c                     | 1 +
 drivers/regulator/mpq7920.c                    | 1 +
 drivers/regulator/mt6311-regulator.c           | 1 +
 drivers/regulator/mt6315-regulator.c           | 1 +
 drivers/regulator/mt6323-regulator.c           | 1 +
 drivers/regulator/mt6331-regulator.c           | 1 +
 drivers/regulator/mt6332-regulator.c           | 1 +
 drivers/regulator/mt6357-regulator.c           | 1 +
 drivers/regulator/mt6358-regulator.c           | 1 +
 drivers/regulator/mt6359-regulator.c           | 1 +
 drivers/regulator/mt6360-regulator.c           | 1 +
 drivers/regulator/mt6370-regulator.c           | 1 +
 drivers/regulator/mt6380-regulator.c           | 1 +
 drivers/regulator/mt6397-regulator.c           | 1 +
 drivers/regulator/mtk-dvfsrc-regulator.c       | 1 +
 drivers/regulator/palmas-regulator.c           | 1 +
 drivers/regulator/pbias-regulator.c            | 1 +
 drivers/regulator/pca9450-regulator.c          | 1 +
 drivers/regulator/pcap-regulator.c             | 1 +
 drivers/regulator/pcf50633-regulator.c         | 1 +
 drivers/regulator/pf8x00-regulator.c           | 1 +
 drivers/regulator/pfuze100-regulator.c         | 1 +
 drivers/regulator/pv88060-regulator.c          | 1 +
 drivers/regulator/pv88080-regulator.c          | 1 +
 drivers/regulator/pv88090-regulator.c          | 1 +
 drivers/regulator/pwm-regulator.c              | 1 +
 drivers/regulator/qcom-labibb-regulator.c      | 1 +
 drivers/regulator/qcom-rpmh-regulator.c        | 1 +
 drivers/regulator/qcom_rpm-regulator.c         | 1 +
 drivers/regulator/qcom_smd-regulator.c         | 1 +
 drivers/regulator/qcom_spmi-regulator.c        | 1 +
 drivers/regulator/qcom_usb_vbus-regulator.c    | 1 +
 drivers/regulator/rc5t583-regulator.c          | 1 +
 drivers/regulator/rk808-regulator.c            | 3 ++-
 drivers/regulator/rn5t618-regulator.c          | 1 +
 drivers/regulator/rpi-panel-attiny-regulator.c | 1 +
 drivers/regulator/rt4801-regulator.c           | 1 +
 drivers/regulator/rt4831-regulator.c           | 1 +
 drivers/regulator/rt5033-regulator.c           | 1 +
 drivers/regulator/rt5120-regulator.c           | 1 +
 drivers/regulator/rt5190a-regulator.c          | 1 +
 drivers/regulator/rt5739.c                     | 1 +
 drivers/regulator/rt5759-regulator.c           | 1 +
 drivers/regulator/rt6160-regulator.c           | 1 +
 drivers/regulator/rt6190-regulator.c           | 1 +
 drivers/regulator/rt6245-regulator.c           | 1 +
 drivers/regulator/rtmv20-regulator.c           | 1 +
 drivers/regulator/rtq2134-regulator.c          | 1 +
 drivers/regulator/rtq6752-regulator.c          | 1 +
 drivers/regulator/s2mpa01.c                    | 1 +
 drivers/regulator/s2mps11.c                    | 1 +
 drivers/regulator/s5m8767.c                    | 1 +
 drivers/regulator/sc2731-regulator.c           | 1 +
 drivers/regulator/sky81452-regulator.c         | 1 +
 drivers/regulator/slg51000-regulator.c         | 1 +
 drivers/regulator/sm5703-regulator.c           | 1 +
 drivers/regulator/stm32-booster.c              | 1 +
 drivers/regulator/stm32-pwr.c                  | 1 +
 drivers/regulator/stm32-vrefbuf.c              | 1 +
 drivers/regulator/stpmic1_regulator.c          | 1 +
 drivers/regulator/stw481x-vmmc.c               | 1 +
 drivers/regulator/sy7636a-regulator.c          | 1 +
 drivers/regulator/sy8106a-regulator.c          | 1 +
 drivers/regulator/sy8824x.c                    | 1 +
 drivers/regulator/sy8827n.c                    | 1 +
 drivers/regulator/ti-abb-regulator.c           | 1 +
 drivers/regulator/tps51632-regulator.c         | 1 +
 drivers/regulator/tps6105x-regulator.c         | 1 +
 drivers/regulator/tps62360-regulator.c         | 1 +
 drivers/regulator/tps6286x-regulator.c         | 1 +
 drivers/regulator/tps65023-regulator.c         | 1 +
 drivers/regulator/tps6507x-regulator.c         | 1 +
 drivers/regulator/tps65086-regulator.c         | 1 +
 drivers/regulator/tps65090-regulator.c         | 1 +
 drivers/regulator/tps65132-regulator.c         | 1 +
 drivers/regulator/tps65217-regulator.c         | 1 +
 drivers/regulator/tps65218-regulator.c         | 1 +
 drivers/regulator/tps65219-regulator.c         | 1 +
 drivers/regulator/tps6524x-regulator.c         | 1 +
 drivers/regulator/tps6586x-regulator.c         | 1 +
 drivers/regulator/tps65910-regulator.c         | 1 +
 drivers/regulator/tps65912-regulator.c         | 1 +
 drivers/regulator/tps68470-regulator.c         | 1 +
 drivers/regulator/twl-regulator.c              | 1 +
 drivers/regulator/twl6030-regulator.c          | 1 +
 drivers/regulator/uniphier-regulator.c         | 1 +
 drivers/regulator/userspace-consumer.c         | 1 +
 drivers/regulator/vctrl-regulator.c            | 1 +
 drivers/regulator/vexpress-regulator.c         | 1 +
 drivers/regulator/virtual.c                    | 1 +
 drivers/regulator/vqmmc-ipq4019-regulator.c    | 1 +
 drivers/regulator/wm831x-dcdc.c                | 4 ++++
 drivers/regulator/wm831x-isink.c               | 1 +
 drivers/regulator/wm831x-ldo.c                 | 3 +++
 drivers/regulator/wm8350-regulator.c           | 1 +
 drivers/regulator/wm8400-regulator.c           | 1 +
 drivers/regulator/wm8994-regulator.c           | 1 +
 178 files changed, 188 insertions(+), 2 deletions(-)
  

Hi dee Ho peeps,

On 3/16/23 21:54, Douglas Anderson wrote:
> This series directly follows from the discussion when I tried to turn
> on PROBE_PREFER_ASYNCHRONOUS just for the fixed-regulator [1] and
> attempts to switch everything in drivers/regulator over to async
> probe.
> 
> Like the similar patch series I did for the MMC subsystem a few years
> ago [2], I've split this patch series into batches corresponding to
> drivers corresponding to actively maintained stable kernel trees with
> the idea to break the patch series up somewhat.
> 
> Most of the description of this series is contained in the first patch
> of the series and then the further patches simply refer back to the
> first one. The logic and reasoning behind all the patches is exactly
> the same.
> 
> As talked about in the first patch, it wouldn't be at all shocking if
> this broke someone. Hopefully this doesn't cause too much of a
> problem. Most of the problems expected would be real underlying bugs
> that already existed and were just tickled by this change. If you're
> facing a problem, it's fairly easy to force individual drivers back to
> "synchronous" probing while the problem is tracked down and fixed.
> 
> I am opting _not_ to CC every single person involved in each of these
> regulators on this patch series because I suspect that the mailing
> lists couldn't handle CCing that many people. This should be on LKML
> so hopefully people can find it there and respond to it that
> way. Anyone who responds will get CCed on future versions, if there
> are any.

The ROHM bd71837/47 (which is included in this series) as well as for 
the ROHM bd71815, bd71828, bd9576 and bd9573 (which are included in the 
other series) - there should be no PMIC internal dependencies to 
regulators. So, from my perspective this looks good.

Right after saying this - I don't have access to most of the boards 
using these PMICs - nor do I know what kind of system level issues there 
may be - hence my ack is not really worth much - but at least I can say: 
"Yes, bring em on - I am mentally prepared for the bug reports" :)

Thanks!

Yours,
	-- Matti
  

On Thu, 16 Mar 2023 12:54:37 -0700, Douglas Anderson wrote:
> This series directly follows from the discussion when I tried to turn
> on PROBE_PREFER_ASYNCHRONOUS just for the fixed-regulator [1] and
> attempts to switch everything in drivers/regulator over to async
> probe.
> 
> Like the similar patch series I did for the MMC subsystem a few years
> ago [2], I've split this patch series into batches corresponding to
> drivers corresponding to actively maintained stable kernel trees with
> the idea to break the patch series up somewhat.
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git for-next

Thanks!

[1/7] regulator: Set PROBE_PREFER_ASYNCHRONOUS for drivers that existed in 4.14
      commit: 259b93b21a9ffe5117af4dfb5505437e463c6a5a
[2/7] regulator: Set PROBE_PREFER_ASYNCHRONOUS for drivers between 4.14 and 4.19
      commit: ed6962cc3e05ca77f526590f62587678149d5e58
[3/7] regulator: Set PROBE_PREFER_ASYNCHRONOUS for drivers between 4.19 and 5.4
      commit: d3b81d97d55871cb11412caedded440f1fddc4e9
[4/7] regulator: Set PROBE_PREFER_ASYNCHRONOUS for drivers between 5.4 and 5.10
      commit: 67dc71c61b64be85ce33d3332ca5511f9b1faef7
[5/7] regulator: Set PROBE_PREFER_ASYNCHRONOUS for drivers between 5.10 and 5.15
      commit: 46600ab142f8c2ecc2a647175fd86d53bc285a9a
[6/7] regulator: Set PROBE_PREFER_ASYNCHRONOUS for drivers between 5.15 and 6.1
      commit: 41cff178e3d6df28acd8490519a656c509b4496f
[7/7] regulator: Set PROBE_PREFER_ASYNCHRONOUS for drivers that are newer than 6.1
      commit: bdce47bb19cbf7784d48e93677c868a69dbae439

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark