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ARM: tegra: moving the clock gating procedure to tegra_cpu_kill

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The tegra_cpu_die was be executed by the CPU itslf. So the clock gating
procedure won't be executed after the CPU hardware shutdown code. Moving
the clock gating procedure to tegra_cpu_kill that will be run by another
CPU after the CPU died.

Signed-off-by: Joseph Lo <josephl@nvidia.com>
Acked-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Joseph Lo 2013-01-03 14:43:00 +08:00 committed by Stephen Warren
parent 57886616ca
commit b811943160
3 changed files with 13 additions and 6 deletions
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1
arch/arm/mach-tegra/common.h
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@ -1,4 +1,5 @@
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);

17
arch/arm/mach-tegra/hotplug.c
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@ -19,6 +19,17 @@
static void (*tegra_hotplug_shutdown)(void);
int tegra_cpu_kill(unsigned cpu)
{
cpu = cpu_logical_map(cpu);
/* Clock gate the CPU */
tegra_wait_cpu_in_reset(cpu);
tegra_disable_cpu_clock(cpu);
return 1;
}
/*
* platform-specific code to shutdown a CPU
*
@ -26,18 +37,12 @@ static void (*tegra_hotplug_shutdown)(void);
*/
void __ref tegra_cpu_die(unsigned int cpu)
{
cpu = cpu_logical_map(cpu);
/* Clean L1 data cache */
tegra_disable_clean_inv_dcache();
/* Shut down the current CPU. */
tegra_hotplug_shutdown();
/* Clock gate the CPU */
tegra_wait_cpu_in_reset(cpu);
tegra_disable_cpu_clock(cpu);
/* Should never return here. */
BUG();
}

1
arch/arm/mach-tegra/platsmp.c
View File

@ -212,6 +212,7 @@ struct smp_operations tegra_smp_ops __initdata = {
.smp_secondary_init = tegra_secondary_init,
.smp_boot_secondary = tegra_boot_secondary,
#ifdef CONFIG_HOTPLUG_CPU
.cpu_kill = tegra_cpu_kill,
.cpu_die = tegra_cpu_die,
.cpu_disable = tegra_cpu_disable,
#endif