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ARM: tegra: bring up secondary CPU for Tegra114

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The secondary CPU can be brought up by toggling the power in PMC. Then
the flow controller will release CPU to go by clearing the reset and
clamp signal automatically.

Based on the work by:
Bo Yan <byan@nvidia.com>

Signed-off-by: Joseph Lo <josephl@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Joseph Lo 2013-02-26 16:28:07 +00:00 committed by Stephen Warren
parent 7e56474456
commit e562b86581
1 changed files with 8 additions and 0 deletions
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8
arch/arm/mach-tegra/platsmp.c
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@ -146,6 +146,12 @@ static int tegra30_boot_secondary(unsigned int cpu, struct task_struct *idle)
return 0;
}
static int tegra114_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
cpu = cpu_logical_map(cpu);
return tegra_pmc_cpu_power_on(cpu);
}
static int __cpuinit tegra_boot_secondary(unsigned int cpu,
struct task_struct *idle)
{
@ -153,6 +159,8 @@ static int __cpuinit tegra_boot_secondary(unsigned int cpu,
return tegra20_boot_secondary(cpu, idle);
if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) && tegra_chip_id == TEGRA30)
return tegra30_boot_secondary(cpu, idle);
if (IS_ENABLED(CONFIG_ARCH_TEGRA_114_SOC) && tegra_chip_id == TEGRA114)
return tegra114_boot_secondary(cpu, idle);
return -EINVAL;
}