From: robert.jarzmik@free•fr (Robert Jarzmik)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v1 0/3] Transition pxa25x clock to common clocks
Date: Thu, 06 Nov 2014 21:04:21 +0100 [thread overview]
Message-ID: <87lhnoxfi2.fsf@free.fr> (raw)
In-Reply-To: <CALT56yOCBN1NAfNw=vThVZ_o=ONGOTvzKHBH5tCTQShJY0wkrQ@mail.gmail.com> (Dmitry Eremin-Solenikov's message of "Thu, 6 Nov 2014 12:45:02 +0400")
Dmitry Eremin-Solenikov <dbaryshkov@gmail•com> writes:
> Hello,
>
> Tested in qemu (pxa25x target).
Excellent.
>
> 0) Had to revert 23c4a3a5212701ad34bd30591fa33d7bacef9c5f to get kernel
> to build for pxa25x + pxa27x.
Yes, good move.
> 1) I got the following backtrace early in the boot:
>
> Division by zero in kernel.
> CPU: 0 PID: 0 Comm: swapper Not tainted 3.18.0-rc2-00011-g7805b78 #97
> [<c000e028>] (unwind_backtrace) from [<c000c0b4>] (show_stack+0x10/0x14)
> [<c000c0b4>] (show_stack) from [<c01a3af0>] (Ldiv0+0x8/0x10)
> [<c01a3af0>] (Ldiv0) from [<c029bb9c>] (clk_pxa25x_memory_get_rate+0x28/0x30)
> [<c029bb9c>] (clk_pxa25x_memory_get_rate) from [<c029b114>]
> (clk_composite_recalc_rate+0x20/0x24)
> [<c029b114>] (clk_composite_recalc_rate) from [<c0299888>]
> (__clk_init+0x1d0/0x4e8)
> [<c0299888>] (__clk_init) from [<c0299d24>] (clk_register+0x100/0x1c4)
> [<c0299d24>] (clk_register) from [<c029b518>]
> (clk_register_composite+0x17c/0x250)
> [<c029b518>] (clk_register_composite) from [<c04cecd4>]
> (pxa25x_clocks_init+0x194/0x240)
> [<c04cecd4>] (pxa25x_clocks_init) from [<c04c048c>] (pxa_timer_init+0x18/0x64)
> [<c04c048c>] (pxa_timer_init) from [<c04bde88>] (time_init+0x1c/0x2c)
> [<c04bde88>] (time_init) from [<c04bbb14>] (start_kernel+0x268/0x3e8)
> [<c04bbb14>] (start_kernel) from [<a0008040>] (0xa0008040)
>
> It might be due to something being not emulated properly, but I'd
> suggest to add a check
> anyway.
You're right about that part. According to the specification, the "M" multiplier
in CCCR can only be 1, 2, or 3. 0 is a reserved value which should never happen,
and if it happens, hardware is already lost.
I don't want to be that defensive in this code unless it blocks something for
good.
> 2) sa1100-rtc could not find a clock and thus failed to be probed.
Ha I'll check that, thanks.
> 3) Had to patch tc6393xb driver to call
> clk_prepare_enable/clk_disable_unprepare -
> will submit a patch shortly.
Good catch.
> 4) Got an issue with IrDA driver - it gets -ENODEV for UARTCLK clock
I'll check that too. It's probable I either forgot a clock or mispelled a
clock.
Thanks for the test Dmitry.
Cheers.
--
Robert
next prev parent reply other threads:[~2014-11-06 20:04 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-02 15:16 [PATCH v1 0/3] Transition pxa25x clock to common clocks Robert Jarzmik
2014-11-02 15:16 ` [PATCH v1 1/3] clk: add pxa25x clock drivers Robert Jarzmik
2014-11-02 15:16 ` [PATCH v1 2/3] arm: pxa: Transition pxa25x to clk framework Robert Jarzmik
2014-11-02 15:16 ` [PATCH v1 3/3] ARM: pxa: move gpio11 clock to board files Robert Jarzmik
2014-11-06 8:45 ` [PATCH v1 0/3] Transition pxa25x clock to common clocks Dmitry Eremin-Solenikov
2014-11-06 20:04 ` Robert Jarzmik [this message]
2014-11-08 17:26 ` Robert Jarzmik
2014-11-08 19:55 ` Dmitry Eremin-Solenikov
2014-11-08 21:01 ` Robert Jarzmik
2014-11-09 16:11 ` Dmitry Eremin-Solenikov
2014-11-09 18:19 ` Robert Jarzmik
2014-11-11 10:09 ` Robert Jarzmik
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=87lhnoxfi2.fsf@free.fr \
--to=robert.jarzmik@free$(echo .)fr \
--cc=linux-arm-kernel@lists$(echo .)infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox