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Commit 510bb595 authored by Joseph Lo's avatar Joseph Lo Committed by Stephen Warren
Browse files

ARM: tegra: add cpu_disable for hotplug 



The Tegra114 could hotplug the CPU0, but the common cpu_disable didn't
support that. Adding a Tegra specific cpu_disable function for it.

Signed-off-by: default avatarJoseph Lo <josephl@nvidia.com>
[swarren: adjusted the switch statement to be future-proof]
Signed-off-by: default avatarStephen Warren <swarren@nvidia.com>
parent 33d5c019

arch/arm/mach-tegra/common.h

+1 −0
Original line number Diff line number Diff line
@@ -2,3 +2,4 @@ extern struct smp_operations tegra_smp_ops; 


extern int tegra_cpu_kill(unsigned int cpu);

extern void tegra_cpu_die(unsigned int cpu);

extern int tegra_cpu_disable(unsigned int cpu);

arch/arm/mach-tegra/hotplug.c

+11 −0
Original line number Diff line number Diff line
@@ -46,6 +46,17 @@ void __ref tegra_cpu_die(unsigned int cpu) 
	BUG();

}



int tegra_cpu_disable(unsigned int cpu)

{

	switch (tegra_chip_id) {

	case TEGRA20:

	case TEGRA30:

		return cpu == 0 ? -EPERM : 0;

	default:

		return 0;

	}

}



void __init tegra_hotplug_init(void)

{

	if (!IS_ENABLED(CONFIG_HOTPLUG_CPU))

arch/arm/mach-tegra/platsmp.c

+1 −0
Original line number Diff line number Diff line
@@ -196,5 +196,6 @@ struct smp_operations tegra_smp_ops __initdata = { 
#ifdef CONFIG_HOTPLUG_CPU

	.cpu_kill		= tegra_cpu_kill,

	.cpu_die		= tegra_cpu_die,

	.cpu_disable		= tegra_cpu_disable,

#endif

};