From 5a5ca56e057d206db13461b84a7da3a3543e1206 Mon Sep 17 00:00:00 2001 From: Dirk Behme Date: Fri, 26 Apr 2013 10:13:55 +0200 Subject: [PATCH] ARM: dts: i.MX6: configure L2 cache data and tag latency 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 Signed-off-by: Shawn Guo [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 --- arch/arm/boot/dts/imx6qdl.dtsi | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi index 9e8296e..fd7cc6d 100644 --- a/arch/arm/boot/dts/imx6qdl.dtsi +++ b/arch/arm/boot/dts/imx6qdl.dtsi @@ -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 { -- 2.7.4