From: Igor Trevisan <igt1972@gmail.com>
To: barebox@lists.infradead.org
Subject: Re: iMX27 clock settings
Date: Wed, 15 Feb 2012 15:59:17 +0100 [thread overview]
Message-ID: <CALQ+5adPFLiwehAoeLoDKwzU5KLhQmMs92GxsT62yDYfppk+aA@mail.gmail.com> (raw)
In-Reply-To: <20120215120911.GB3852@pengutronix.de>
>
> One thing that might be interesting in such cases is the output of
> the dump_clocks command.
It's a useful debug command!
Here it is its output:
barebox:/ dump_clocks
chip id: [2,882,1,01d]
mpll: 600000000 Hz
spll: 240000000 Hz
arm: 400000000 Hz
perclk1: 20000000 Hz
perclk2: 40000000 Hz
perclk3: 100000000 Hz
perclk4: 40000000 Hz
clkin26: 26000000 Hz
ahb: 133333333 Hz
ipg: 66666666 Hz
barebox:/
This is what I get after the last configuration I tried:
writel(0x00262C15, MPCTL0)
writel(0x040C2403, SPCTL0)
writel(0x33F30207, CSCR) /* Use DIV3 and AHBDIV=10 */
We have three different boards using iMX27L; on two of them
Barebox with this setting runs properly, on the third we frequently
see the system hanging (cyclic restarts).
Note: I have the same results with:
writel(0x33F30307, CSCR) /* Use DIV3 and AHBDIV=11 */
Best regards,
I.
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next prev parent reply other threads:[~2012-02-15 14:59 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-14 15:10 Igor Trevisan
2012-02-15 9:15 ` Kamel BOUHARA
2012-02-15 11:10 ` Igor Trevisan
2012-02-15 9:29 ` Juergen Beisert
2012-02-15 12:09 ` Sascha Hauer
2012-02-15 14:59 ` Igor Trevisan [this message]
2012-02-15 16:06 ` Igor Trevisan
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