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ARM: dts: i.MX6: configure L2 cache data and tag latency

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Configure the data and tag latency for the L2 cache. This improves the
system performance.

This configuration is taken from Freescale's kernel patch

"ENGR00153601 [MX6]Adjust L2 cache parameter" [1]

which does

writel(0x132, IO_ADDRESS(L2_BASE_ADDR + L2X0_TAG_LATENCY_CTRL));
writel(0x132, IO_ADDRESS(L2_BASE_ADDR + L2X0_DATA_LATENCY_CTRL));

In this patch we are doing the same via the device tree.

Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

[1] http://git.freescale.com/git/cgit.cgi/imx/linux-2.6-imx.git/commit/arch/arm/mach-mx6/mm.c?h=imx_3.0.35_12.09.01&id=814656410b40c67a10b25300e51b0477b2bb96d1
This commit is contained in:
Dirk Behme 2013-04-26 10:13:55 +02:00 committed by Shawn Guo
parent faacc290ee
commit 5a5ca56e05
1 changed files with 2 additions and 0 deletions
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2
arch/arm/boot/dts/imx6qdl.dtsi
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@ -106,6 +106,8 @@
interrupts = <0 92 0x04>;
cache-unified;
cache-level = <2>;
arm,tag-latency = <4 2 3>;
arm,data-latency = <4 2 3>;
};
pmu {