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| author | Romain Perier <romain.perier@gmail.com> | 2014-07-19 17:03:26 +0400 |
|---|---|---|
| committer | Heiko Stuebner <heiko@sntech.de> | 2014-07-23 13:42:29 +0400 |
| commit | f54b91fdfa7a1b5603d6d00f9972765662a4e6ef (patch) | |
| tree | 28d1a042d7900baa26519e6418e7d946112b0c53 /arch/arm/mach-rockchip/platsmp.c | |
| parent | 09af6a59fb2cc4c88eae3ec884bfe6cb282ffa00 (diff) | |
| download | linux-f54b91fdfa7a1b5603d6d00f9972765662a4e6ef.tar.xz | |
ARM: rockchip: Add cpu hotplug support for RK3XXX SoCs
Adds ability to shutdown all CPUs except the first one
(since it might be special for a lot of platforms).
It is now possible to use kexec which requires such a feature.
Signed-off-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Diffstat (limited to 'arch/arm/mach-rockchip/platsmp.c')
| -rw-r--r-- | arch/arm/mach-rockchip/platsmp.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm/mach-rockchip/platsmp.c b/arch/arm/mach-rockchip/platsmp.c index 910835d4ccf4..189684f55927 100644 --- a/arch/arm/mach-rockchip/platsmp.c +++ b/arch/arm/mach-rockchip/platsmp.c @@ -21,6 +21,7 @@ #include <linux/of_address.h> #include <asm/cacheflush.h> +#include <asm/cp15.h> #include <asm/smp_scu.h> #include <asm/smp_plat.h> #include <asm/mach/map.h> @@ -178,8 +179,27 @@ static void __init rockchip_smp_prepare_cpus(unsigned int max_cpus) pmu_set_power_domain(0 + i, false); } +#ifdef CONFIG_HOTPLUG_CPU +static int rockchip_cpu_kill(unsigned int cpu) +{ + pmu_set_power_domain(0 + cpu, false); + return 1; +} + +static void rockchip_cpu_die(unsigned int cpu) +{ + v7_exit_coherency_flush(louis); + while(1) + cpu_do_idle(); +} +#endif + static struct smp_operations rockchip_smp_ops __initdata = { .smp_prepare_cpus = rockchip_smp_prepare_cpus, .smp_boot_secondary = rockchip_boot_secondary, +#ifdef CONFIG_HOTPLUG_CPU + .cpu_kill = rockchip_cpu_kill, + .cpu_die = rockchip_cpu_die, +#endif }; CPU_METHOD_OF_DECLARE(rk3066_smp, "rockchip,rk3066-smp", &rockchip_smp_ops); |