realtek: activate MIPS power cluster controller for RTL931x

The SMP environment is prepared well for the RTL93X. Now describe the
power cluster controller in the DTS. Tested on RTL9311 based Linksys
LGS352C.

Without patch:

root@OpenWrt:~# dmesg | grep CPU
[    0.140425] CPU1 revision is: 0001a120 (MIPS interAptiv (multi))
[    0.191952] Synchronize counters for CPU 1: done.
[    1.232191] CPU2: failed to start
[    1.237863] No online CPU in core 1 to start CPU3
[    2.273784] CPU3: failed to start
[    2.277589] smp: Brought up 1 node, 2 CPUs

root@OpenWrt:~# cat /proc/cpuinfo  | grep -E "model|proc"
processor               : 0
cpu model               : MIPS interAptiv (multi) V2.0
processor               : 1
cpu model               : MIPS interAptiv (multi) V2.0

With patch:

root@OpenWrt:~# dmesg | grep CPU
[    0.000000] CPU0 revision is: 0001a120 (MIPS interAptiv (multi))
[    0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
[    0.000000] Failed to get CPU clock: -2
[    0.000000] CPU frequency from device tree: 1000MHz
[    0.133360] smp: Bringing up secondary CPUs ...
[    0.140418] CPU1 revision is: 0001a120 (MIPS interAptiv (multi))
[    0.191950] Synchronize counters for CPU 1: done.
[    0.230103] CPU2 revision is: 0001a120 (MIPS interAptiv (multi))
[    0.289220] Synchronize counters for CPU 2: done.
[    0.326189] CPU3 revision is: 0001a120 (MIPS interAptiv (multi))
[    0.378861] Synchronize counters for CPU 3: done.
[    0.413829] smp: Brought up 1 node, 4 CPUs

processor               : 0
cpu model               : MIPS interAptiv (multi) V2.0
processor               : 1
cpu model               : MIPS interAptiv (multi) V2.0
processor               : 2
cpu model               : MIPS interAptiv (multi) V2.0
processor               : 3
cpu model               : MIPS interAptiv (multi) V2.0

Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/19110
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

diff --git a/target/linux/realtek/dts/rtl931x.dtsi b/target/linux/realtek/dts/rtl931x.dtsi
index ad10272d7a810976c9779b4c4af14e74fba38e02..7ecfd2a0c6e2d5ffbb181717b7bbd34dc30ff07c 100644 (file)
--- a/target/linux/realtek/dts/rtl931x.dtsi
+++ b/target/linux/realtek/dts/rtl931x.dtsi
@@ -45,6 +45,11 @@
                clock-frequency = <200000000>;
        };
 
+       cpc: cpc@1bde0000 {
+               compatible = "mti,mips-cpc";
+               reg = <0x1bde0000 0x8000>;
+       };
+
        cpuclock: cpuclock@0 {
                #clock-cells = <0>;
                compatible = "fixed-clock";