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Message-ID: <AANLkTikbOQZ2jW+mfN41dXwuKVVJ3vCVKRZLezxbj61o@mail.gmail.com>
Date: Sun, 20 Feb 2011 20:23:20 -0800
From: Olof Johansson <olof@...om.net>
To: Colin Cross <ccross@...roid.com>
Cc: linux-tegra@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
konkers@...roid.com, Russell King <linux@....linux.org.uk>,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 18/21] ARM: tegra: cpufreq: Adjust memory frequency
with cpu frequency
On Sat, Feb 19, 2011 at 2:26 PM, Colin Cross <ccross@...roid.com> wrote:
> Signed-off-by: Colin Cross <ccross@...roid.com>
Patch description please. Besides that:
Acked-by: Olof Johansson <olof@...om.net>
But note for future work:
> + /*
> + * Vote on memory bus frequency based on cpu frequency
> + * This sets the minimum frequency, display or avp may request higher
> + */
> + if (rate >= 816000)
> + clk_set_rate(emc_clk, 600000000); /* cpu 816 MHz, emc max */
> + else if (rate >= 456000)
> + clk_set_rate(emc_clk, 300000000); /* cpu 456 MHz, emc 150Mhz */
> + else
> + clk_set_rate(emc_clk, 100000000); /* emc 50Mhz */
> +
This hardcodes frequencies that might or might not be used on some
systems and some parts. So it'll need to be revisited when enabling
other configurations.
-Olof
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