From: Sascha Hauer <s.hauer@pengutronix.de>
To: "Eric Bénard" <eric@eukrea.com>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH] Add support for Eukrea CPUIMX35
Date: Thu, 10 Jun 2010 13:42:02 +0200 [thread overview]
Message-ID: <20100610114202.GK20799@pengutronix.de> (raw)
In-Reply-To: <1276155782-6173-1-git-send-email-eric@eukrea.com>
Hi Eric,
On Thu, Jun 10, 2010 at 09:43:02AM +0200, Eric Bénard wrote:
> +
> +#define MPCTL_PARAM_399 (IMX_PLL_PD(0) | IMX_PLL_MFD(15) | IMX_PLL_MFI(8) | IMX_PLL_MFN(5))
> +#define MPCTL_PARAM_532 ((1 << 31) | IMX_PLL_PD(0) | IMX_PLL_MFD(11) | IMX_PLL_MFI(11) | IMX_PLL_MFN(1))
> +
> +static int do_cpufreq(struct command *cmdtp, int argc, char *argv[])
> +{
> + unsigned long freq;
> +
> + if (argc != 2)
> + return COMMAND_ERROR_USAGE;
> +
> + freq = simple_strtoul(argv[1], NULL, 0);
> +
> + switch (freq) {
> + case 399:
> + writel(MPCTL_PARAM_399, IMX_CCM_BASE + CCM_MPCTL);
> + break;
> + case 532:
> + writel(MPCTL_PARAM_532, IMX_CCM_BASE + CCM_MPCTL);
> + break;
> + default:
> + return COMMAND_ERROR_USAGE;
> + }
> +
> + printf("Switched CPU frequency to %dMHz\n", freq);
> +
> + return 0;
> +}
I originally added this to the phyCORE i.MX35 board because we had
problems running it at 532 MHz. If you do not have it you probably don't
need it. Though I can keep it if you wish.
Sascha
--
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Industrial Linux Solutions | http://www.pengutronix.de/ |
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next prev parent reply other threads:[~2010-06-10 11:42 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-10 7:43 Eric Bénard
2010-06-10 11:42 ` Sascha Hauer [this message]
2010-06-10 13:26 ` Eric Bénard
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