[openwrt/openwrt] mediatek: filogic: increase nand flash speed on Redmi AX6000

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/7b6dcaf37c019dcf1dab7fe4972a75d6e371e759

commit 7b6dcaf37c019dcf1dab7fe4972a75d6e371e759
Author: Aleksander Jan Bajkowski <olek2 at wp.pl>
AuthorDate: Mon Jul 14 23:21:51 2025 +0200

    mediatek: filogic: increase nand flash speed on Redmi AX6000
    
    This commit increases the SPI bus frequency from 20 to 52 MHz. Reduces boot
    time by 2s. Below is a performance comparison.
    
    Before:
    root at OpenWrt:~# dd if=/dev/mtd5 of=/dev/null bs=10M count=1 status=progress
    10485760 bytes (10 MB, 10 MiB) copied, 2 s, 5.8 MB/
    
    After:
    root at OpenWrt:~# dd if=/dev/mtd5 of=/dev/null bs=10M count=1 status=progress
    10485760 bytes (10 MB, 10 MiB) copied, 1 s, 9.7 MB/s
    
    Taken from PR #18752 as each device should be tested individually, so I have
    created a separate PR for this.
    
    Signed-off-by: Sky Huang <SkyLake.Huang at mediatek.com>
    Signed-off-by: Aleksander Jan Bajkowski <olek2 at wp.pl>
    Link: https://github.com/openwrt/openwrt/pull/19439
    Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 target/linux/mediatek/dts/mt7986a-xiaomi-redmi-router-ax6000.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/linux/mediatek/dts/mt7986a-xiaomi-redmi-router-ax6000.dtsi b/target/linux/mediatek/dts/mt7986a-xiaomi-redmi-router-ax6000.dtsi
index c262461106..fe3e760914 100644
--- a/target/linux/mediatek/dts/mt7986a-xiaomi-redmi-router-ax6000.dtsi
+++ b/target/linux/mediatek/dts/mt7986a-xiaomi-redmi-router-ax6000.dtsi
@@ -136,7 +136,7 @@
 		#size-cells = <1>;
 		reg = <0>;
 
-		spi-max-frequency = <20000000>;
+		spi-max-frequency = <52000000>;
 		spi-tx-bus-width = <4>;
 		spi-rx-bus-width = <4>;