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Commit c21af444 authored by Magnus Damm's avatar Magnus Damm Committed by Simon Horman
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ARM: shmobile: smp: Add function to prioritize DT SMP 



Add a function to check if other DT based method is available, and
if so return false to not hook up smp_ops from the machine vector.

This results in that DT-based SMP support has priority over older
C-based smp_ops code, and in case DT-based SMP support code does not
exist in the DTB then the old smp_ops code will still work as-is.

Signed-off-by: default avatarMagnus Damm <damm+renesas@opensource.se>
Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: default avatarSimon Horman <horms+renesas@verge.net.au>
parent 5f3bca0d

arch/arm/mach-shmobile/common.h

+1 −0
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ extern void shmobile_smp_sleep(void); 
extern void shmobile_smp_hook(unsigned int cpu, unsigned long fn,

			      unsigned long arg);

extern bool shmobile_smp_cpu_can_disable(unsigned int cpu);

extern bool shmobile_smp_init_fallback_ops(void);

extern void shmobile_boot_scu(void);

extern void shmobile_smp_scu_prepare_cpus(phys_addr_t scu_base_phys,

					  unsigned int max_cpus);

arch/arm/mach-shmobile/platsmp.c

+6 −0
Original line number Diff line number Diff line
@@ -36,3 +36,9 @@ bool shmobile_smp_cpu_can_disable(unsigned int cpu) 
	return true; /* Hotplug of any CPU is supported */

}

#endif



bool __init shmobile_smp_init_fallback_ops(void)

{

	/* fallback on PSCI/smp_ops if no other DT based method is detected */

	return platform_can_secondary_boot() ? true : false;

}