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arm: Add PSCI shutdown function
Using PSCI you can not only reset the system, you can also shut it down! This patch exposes a function to do exactly that to whatever code wants to make use of it. Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Simon Glass <sjg@chromium.org>
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@ -97,3 +97,18 @@ void __noreturn psci_system_reset(void)
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while (1)
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;
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}
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void __noreturn psci_system_off(void)
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{
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struct pt_regs regs;
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regs.regs[0] = ARM_PSCI_0_2_FN_SYSTEM_OFF;
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if (use_smc_for_psci)
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smc_call(®s);
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else
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hvc_call(®s);
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while (1)
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;
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}
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@ -116,6 +116,7 @@ void flush_l3_cache(void);
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void smc_call(struct pt_regs *args);
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void __noreturn psci_system_reset(void);
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void __noreturn psci_system_off(void);
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#endif /* __ASSEMBLY__ */
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