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| author | Joseph Lo <josephl@nvidia.com> | 2013-05-21 14:13:35 +0400 |
|---|---|---|
| committer | Stephen Warren <swarren@nvidia.com> | 2013-05-29 01:26:07 +0400 |
| commit | 510bb595de26f90e5bb7c4a1e2a584e38398cf00 (patch) | |
| tree | 1a0cb9b73611ccb4583532def3cc425b0a30c820 /arch/arm/mach-tegra | |
| parent | 33d5c01915ccca298a5fda7e0cb33199d225e03a (diff) | |
| download | linux-510bb595de26f90e5bb7c4a1e2a584e38398cf00.tar.xz | |
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: Joseph Lo <josephl@nvidia.com>
[swarren: adjusted the switch statement to be future-proof]
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Diffstat (limited to 'arch/arm/mach-tegra')
| -rw-r--r-- | arch/arm/mach-tegra/common.h | 1 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/hotplug.c | 11 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/platsmp.c | 1 |
3 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/common.h b/arch/arm/mach-tegra/common.h index 5900cc44f780..32f8eb3fe344 100644 --- a/arch/arm/mach-tegra/common.h +++ b/arch/arm/mach-tegra/common.h @@ -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); diff --git a/arch/arm/mach-tegra/hotplug.c b/arch/arm/mach-tegra/hotplug.c index d07f152b275f..a52c10e0a857 100644 --- a/arch/arm/mach-tegra/hotplug.c +++ b/arch/arm/mach-tegra/hotplug.c @@ -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)) diff --git a/arch/arm/mach-tegra/platsmp.c b/arch/arm/mach-tegra/platsmp.c index 554aedc98c9f..24db4ac428ae 100644 --- a/arch/arm/mach-tegra/platsmp.c +++ b/arch/arm/mach-tegra/platsmp.c @@ -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 }; |