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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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a30eceb7a5
Ask firmware to put RAM in self-refresh mode and power system down.
echo mem > /sys/power/state
See Documentation/power/states.txt
Signed-off-by: Marc Gonzalez <marc_gonzalez@sigmadesigns.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
33 lines
622 B
C
33 lines
622 B
C
#include <linux/init.h>
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#include <linux/suspend.h>
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#include <asm/suspend.h>
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#include "smc.h"
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static int tango_pm_powerdown(unsigned long arg)
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{
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tango_suspend(virt_to_phys(cpu_resume));
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return -EIO; /* tango_suspend has failed */
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}
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static int tango_pm_enter(suspend_state_t state)
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{
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if (state == PM_SUSPEND_MEM)
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return cpu_suspend(0, tango_pm_powerdown);
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return -EINVAL;
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}
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static const struct platform_suspend_ops tango_pm_ops = {
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.enter = tango_pm_enter,
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.valid = suspend_valid_only_mem,
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};
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static int __init tango_pm_init(void)
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{
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suspend_set_ops(&tango_pm_ops);
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return 0;
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}
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late_initcall(tango_pm_init);
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