From 83880cd01ee4db9cdf5c63d9c7fa1973366e4acc Mon Sep 17 00:00:00 2001 From: Markus Stockhausen Date: Sun, 22 Jun 2025 03:53:08 -0400 Subject: [PATCH] realtek: Use Otto timer on RTL931x Until now the timer management on the RTL931x devices depends on the MIPS default timer. Looking at the clock progress on these devices one can see that it is totally off. It is running at half the required speed (e.g. if 1 minute passes the date command shows that according to the timers only 30 seconds have elapsed). This is a mix from wrong DTS and bad startup code. This is not only a cosmetic issue but has effects on every delay operation inside the kernel. Switch RTL931x to the proven Otto timer. Tested on LGS352C based on RTL9311. Signed-off-by: Markus Stockhausen Link: https://github.com/openwrt/openwrt/pull/19205 Signed-off-by: Robert Marko --- target/linux/realtek/dts/rtl931x.dtsi | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/target/linux/realtek/dts/rtl931x.dtsi b/target/linux/realtek/dts/rtl931x.dtsi index c7feef4724a..df85112464b 100644 --- a/target/linux/realtek/dts/rtl931x.dtsi +++ b/target/linux/realtek/dts/rtl931x.dtsi @@ -89,12 +89,6 @@ * controller & should be probed first. */ interrupt-parent = <&cpuintc>; - - timer { - compatible = "mti,gic-timer"; - interrupts = ; - clocks = <&cpuclock>; - }; }; soc: soc { @@ -141,6 +135,18 @@ interrupts = ; }; + timer0: timer@3200 { + compatible = "realtek,rtl931x-timer", "realtek,otto-timer"; + reg = <0x3200 0x10>, <0x3210 0x10>, <0x3220 0x10>, + <0x3230 0x10>, <0x3240 0x10>, <0x3250 0x10>; + + interrupt-parent = <&gic>; + interrupts = , , + , , + , ; + clocks = <&lx_clk>; + }; + uart0: uart@2000 { compatible = "ns16550a"; reg = <0x2000 0x100>; -- 2.47.2