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AM572x deactivation of one CortexA15 core
Part Number: AM5726
We are bringing up a custom board based on AM572x GP EVM. We are using SDK version 220.127.116.11. We are using a smaller PMIC TPS65916 rather than TPS659038, so we must disable one Cortex A15 at boot up. I'm reading this thread:
https://e2e.ti.com/support/arm/sitara_arm/f/791/t/551530 When I tried the fix suggested:
--- a/kernel/smp.c+++ b/kernel/smp.c@@ -481,7 +481,7 @@ int smp_call_function(smp_call_func_t func, void *info, int wait) EXPORT_SYMBOL(smp_call_function); /* Setup configured maximum number of CPUs to activate */-unsigned int setup_max_cpus = NR_CPUS;+unsigned int setup_max_cpus = 1; EXPORT_SYMBOL(setup_max_cpus);
I'm still seeing 2 CPS brought up and later kernel crashed (maybe due to the PMIC unable to sustain).
Could you please confirm if this change should still work on SDK 18.104.22.168? If not, what is the suggested way of doing this?
If there is a better way to do it through defconfig, could you clarify which config flags should be turned off? I have tried that but was unable to figured from the numerous flags that related to SMP.
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