Difuse/difos
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

realtek: relocate mips cpc probing

Browse source 
The MIPS CPC (Cluster Power Controller) is setup during boot and can take
its configuration from the devicetree. This is currently not possible
because the cpc probing happens before dt initialization. Call order
during startup is:

setup_arch()
  prom_init() <- our function
    mips_cpc_probe()
    smp_stuff()
  arch_mem_init()
    device_tree_init() <- our function
      unflatten_and_copy_device_tree()

To avoid ugly hacking and support a clean devicetree relocate the cps/smp
stuff to device_tree_init(). This is basically the same location as in
generic mips initialization.

Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Signed-off-by: Sebastian Gottschall <s.gottschall@dd-wrt.com>
Link: https://github.com/openwrt/openwrt/pull/18888
Signed-off-by: Robert Marko <robimarko@gmail.com>
This commit is contained in:
Markus Stockhausen 2025-05-23 13:21:28 -04:00 committed by Robert Marko
parent 897abbfc4a
commit cd808d9997
1 changed files with 17 additions and 16 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

33
target/linux/realtek/files-6.6/arch/mips/rtl838x/prom.c
View file

@ -76,6 +76,23 @@ void __init device_tree_init(void)
}
initial_boot_params = (void *)fdt;
unflatten_and_copy_device_tree();
/* delay cpc & smp probing to allow devicetree access */
mips_cpc_probe();
if (!register_cps_smp_ops())
return;
#ifdef CONFIG_MIPS_MT_SMP
if (cpu_has_mipsmt) {
rtl_smp_ops = vsmp_smp_ops;
rtl_smp_ops.init_secondary = rtl_init_secondary;
register_smp_ops(&rtl_smp_ops);
return;
}
#endif
register_up_smp_ops();
}
void __init identify_rtl9302(void)
@ -205,20 +222,4 @@ void __init prom_init(void)
fw_arg2 = 0;
fw_init_cmdline();
mips_cpc_probe();
if (!register_cps_smp_ops())
return;
#ifdef CONFIG_MIPS_MT_SMP
if (cpu_has_mipsmt) {
rtl_smp_ops = vsmp_smp_ops;
rtl_smp_ops.init_secondary = rtl_init_secondary;
register_smp_ops(&rtl_smp_ops);
return;
}
#endif
register_up_smp_ops();
}