On Wed, Jan 30, 2013 at 10:33:55AM +0100, Steffen Trumtrar wrote:
> The mxc-timer on the imx25 needs to be derived from the AHB clock.
> If a bootloader reparents this clock to the ipg_clk_highfreq, which according
> to the datasheet is a valid operation, the system can/will produce lockups/
> freezes after some time [1].
>
> This can be forced with code like
> while(1)
> syscall(SYS_clock_gettime, CLOCK_REALTIME, &tp);
>
> This was already fixed with the commit
> "i.MX25 GPT clock fix: ensure correct the clock source" [2],
> but it seems, that it got lost. So, re-add this to have a correct gpt.
>
> [1]:
> http://lists.arm.linux.org.uk/lurker/message/20130129.161230.229bda17.en.html
> [2]: 2012d9ca2a1381ae3e733330a7f0d1d2f1988bba
Instead of the last paragraph I'd write:
This problem was already fixed with commit
2012d9c (i.MX25 GPT clock fix: ensure correct the clock source)
for v3.1-rc2 but this was lost when i.MX was converted to the common
clock framework (commit 6bbaec5; ARM i.MX25: implement clocks using
common clock framework).
> Signed-off-by: Steffen Trumtrar <[email protected]>
> Cc: [email protected]
Cc: [email protected] # v3.5+
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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