[openwrt/openwrt] mvebu: LS421DE: fix low performance issue

[LEDE Commits]

ynezz pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/3064651bf75d3ca08cbfff916a14e8b3c4c246fb

commit 3064651bf75d3ca08cbfff916a14e8b3c4c246fb
Author: Daniel González Cabanelas <dgcbueu at gmail.com>
AuthorDate: Fri Nov 13 20:22:51 2020 +0100

    mvebu: LS421DE: fix low performance issue
    
    The Buffalo Linkstation LS421DE isn't able to enable the Level 2 cache
    (AKA Aurora cache). As of result of this, the throughput is about half of
    the expected, e.g when doing network data transfers.
    
    Fix it by adding the broken-idle property in the coherency fabric node.
    
    Signed-off-by: Daniel González Cabanelas <dgcbueu at gmail.com>
---
 .../mvebu/files/arch/arm/boot/dts/armada-370-buffalo-ls421de.dts      | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/target/linux/mvebu/files/arch/arm/boot/dts/armada-370-buffalo-ls421de.dts b/target/linux/mvebu/files/arch/arm/boot/dts/armada-370-buffalo-ls421de.dts
index e804665792..2a76649ec4 100644
--- a/target/linux/mvebu/files/arch/arm/boot/dts/armada-370-buffalo-ls421de.dts
+++ b/target/linux/mvebu/files/arch/arm/boot/dts/armada-370-buffalo-ls421de.dts
@@ -209,6 +209,10 @@
 	};
 };
 
+&coherencyfab {
+	broken-idle;
+};
+
 &eth1 {
 	pinctrl-0 = <&ge1_rgmii_pins>;
 	pinctrl-names = "default";