linux-amlogic.lists.infradead.org archive mirror
 help / color / mirror / Atom feed
From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
To: Anand Moon <linux.amoon@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>,
	devicetree <devicetree@vger.kernel.org>,
	Neil Armstrong <narmstrong@baylibre.com>,
	Kevin Hilman <khilman@baylibre.com>,
	Linux Kernel <linux-kernel@vger.kernel.org>,
	Rob Herring <robh+dt@kernel.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	linux-amlogic@lists.infradead.org, Will Deacon <will@kernel.org>,
	linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
	Jerome Brunet <jbrunet@baylibre.com>
Subject: Re: [RFCv1 5/5] arm64/ARM: configs: Change CONFIG_PWM_MESON from m to y
Date: Wed, 9 Oct 2019 19:05:46 +0200	[thread overview]
Message-ID: <CAFBinCCHrvjNTruVk7qr+7Y_m7mP2BJ-0HxftJpiPXpvoD=-QQ@mail.gmail.com> (raw)
In-Reply-To: <CANAwSgSeYTnUkLnjw-RORw76Fyj3_WT0cdM9D0vFsY8g=9L94Q@mail.gmail.com>

Hi Anand,

On Wed, Oct 9, 2019 at 10:49 AM Anand Moon <linux.amoon@gmail.com> wrote:
[...]
> > can you please share a boot log with the command line parameter
> > "initcall_debug" [0]?
> > from Documentation/admin-guide/kernel-parameters.txt:
> >  initcall_debug [KNL] Trace initcalls as they are executed.  Useful
> >  for working out where the kernel is dying during
> >  startup.
> >
>
> Well I have tied to add this command  *initcall_debug* to kernel command prompt.
> Here is the console log,  but I did not see any init kernel timer logs
I don't remember from the top of my head if any additional Kconfig
setting is needed

> Kernel command line: console=ttyAML0,115200n8
> root=PARTUUID=45d7d61e-01 rw rootwait
> earlyprintk=serial,ttyAML0,115200 initcall_debug printk.time=y
>
> [0] https://pastebin.com/eBgJrSKe
>
> > you can also try the command line parameter "clk_ignore_unused" (it's
> > just a gut feeling: maybe a "critical" clock is being disabled because
> > it's not wired up correctly).
> >
>
> It look like some clk issue after I added the *clk_ignore_unused* to
> kernel command line
> it booted further to login prompt and cpufreq DVFS seem to be loaded.
> So I could conclude this is clk issue.below is the boot log
interesting - as Jerome suggested: the next step is to find out which
clock is causing problems
last time I checked there was no debug print in the code which
disables unused clocks so I had to add that myself

> Kernel command line: console=ttyAML0,115200n8
> root=PARTUUID=45d7d61e-01 rw rootwait
> earlyprintk=serial,ttyAML0,115200 initcall_debug printk.time=y
> clk_ignore_unused
>
> [1] https://pastebin.com/Nsk0wZQJ
>
> > back when I was working out the CPU clock tree for the 32-bit SoCs I
> > had a bad parent clock in one of the muxes which resulted in sporadic
> > lockups if CPU DVFS was enabled.
> > you can try to disable CPU DVFS by dropping the OPP table and it's
> > references from the .dtsi
> >
>
> Yep yesterday my focus was to disable PWM feature and get boot up-to
> login prompt
> But not I have to look into clk feature.
>
> *Many thanks for your valuable inputs, I learned a lot of things.*
you're welcome :-)


Martin

_______________________________________________
linux-amlogic mailing list
linux-amlogic@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-amlogic

  parent reply	other threads:[~2019-10-09 17:06 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-07 13:16 [RFCv1 0/5] Odroid N2 failes to boot using upstream kernel & u-boot Anand Moon
2019-10-07 13:16 ` [RFCv1 1/5] arm64: dts: meson: Add missing 5V_EN gpio signal for VCC5V regulator Anand Moon
2019-10-07 14:19   ` Neil Armstrong
2019-10-07 15:28     ` Anand Moon
2019-10-07 13:16 ` [RFCv1 2/5] arm64: dts: meson: Add missing pwm control gpio signal for pwm-regulator Anand Moon
2019-10-07 14:20   ` Neil Armstrong
2019-10-07 15:30     ` Anand Moon
2019-10-07 13:16 ` [RFCv1 3/5] arm64: dts: meson: Add missing regulator linked to VDDAO_3V3 regulator to FLASH_VDD Anand Moon
2019-10-07 14:20   ` Neil Armstrong
2019-10-07 15:53     ` Anand Moon
2019-10-07 13:16 ` [RFCv1 4/5] arm64: dts: meson: Add missing regulator linked to VCCV5 regulator to VDDIO_C/TF_IO Anand Moon
2019-10-07 14:21   ` Neil Armstrong
2019-10-07 15:54     ` Anand Moon
2019-10-07 13:16 ` [RFCv1 5/5] arm64/ARM: configs: Change CONFIG_PWM_MESON from m to y Anand Moon
2019-10-07 14:25   ` Neil Armstrong
2019-10-07 15:52     ` Anand Moon
2019-10-07 20:10   ` Martin Blumenstingl
2019-10-07 22:57     ` Kevin Hilman
2019-10-08 14:38       ` Anand Moon
2019-10-08 17:40         ` Martin Blumenstingl
2019-10-09  8:48           ` Anand Moon
2019-10-09 12:04             ` Jerome Brunet
2019-10-18 14:04               ` Anand Moon
2019-10-18 14:13                 ` Neil Armstrong
2019-10-18 15:21                   ` Anand Moon
2019-10-18 18:10                 ` Martin Blumenstingl
2019-10-21 14:11                   ` Anand Moon
2019-10-21 14:25                     ` Neil Armstrong
2019-10-21 15:41                       ` Anand Moon
2019-10-26 18:56                         ` Anand Moon
2019-10-24 20:20                     ` Martin Blumenstingl
2019-10-09 17:05             ` Martin Blumenstingl [this message]
2019-10-08  7:19     ` Anand Moon

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='CAFBinCCHrvjNTruVk7qr+7Y_m7mP2BJ-0HxftJpiPXpvoD=-QQ@mail.gmail.com' \
    --to=martin.blumenstingl@googlemail.com \
    --cc=catalin.marinas@arm.com \
    --cc=devicetree@vger.kernel.org \
    --cc=jbrunet@baylibre.com \
    --cc=khilman@baylibre.com \
    --cc=linux-amlogic@lists.infradead.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux.amoon@gmail.com \
    --cc=mark.rutland@arm.com \
    --cc=narmstrong@baylibre.com \
    --cc=robh+dt@kernel.org \
    --cc=will@kernel.org \
    --subject='Re: [RFCv1 5/5] arm64/ARM: configs: Change CONFIG_PWM_MESON from m to y' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).