threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
39 lines
728 B
C
39 lines
728 B
C
/*
|
|
* CPU hotplug support for CSR Marco dual-core SMP SoCs
|
|
*
|
|
* Copyright (c) 2012 Cambridge Silicon Radio Limited, a CSR plc group company.
|
|
*
|
|
* Licensed under GPLv2 or later.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/smp.h>
|
|
|
|
#include <asm/smp_plat.h>
|
|
|
|
static inline void platform_do_lowpower(unsigned int cpu)
|
|
{
|
|
/* we put the platform to just WFI */
|
|
for (;;) {
|
|
__asm__ __volatile__("dsb\n\t" "wfi\n\t"
|
|
: : : "memory");
|
|
if (pen_release == cpu_logical_map(cpu)) {
|
|
/*
|
|
* OK, proper wakeup, we're done
|
|
*/
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* platform-specific code to shutdown a CPU
|
|
*
|
|
* Called with IRQs disabled
|
|
*/
|
|
void sirfsoc_cpu_die(unsigned int cpu)
|
|
{
|
|
platform_do_lowpower(cpu);
|
|
}
|