diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-10-27 13:37:40 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-10-27 13:37:40 -0300 |
commit | badc0e42604c4465facd81d2323e98b3b1eb9188 (patch) | |
tree | e61811e7ddf70517f4b546d522ba3b630b38f50f /arch/arm/mach-exynos/mcpm-exynos.c | |
parent | f19866e5cb04f8f007cb422132ea4611cdacc8e3 (diff) |
Linux-libre 4.2.4-gnupck-4.2.4-gnu
Diffstat (limited to 'arch/arm/mach-exynos/mcpm-exynos.c')
-rw-r--r-- | arch/arm/mach-exynos/mcpm-exynos.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/arch/arm/mach-exynos/mcpm-exynos.c b/arch/arm/mach-exynos/mcpm-exynos.c index 9bdf54795..56978199c 100644 --- a/arch/arm/mach-exynos/mcpm-exynos.c +++ b/arch/arm/mach-exynos/mcpm-exynos.c @@ -20,6 +20,7 @@ #include <asm/cputype.h> #include <asm/cp15.h> #include <asm/mcpm.h> +#include <asm/smp_plat.h> #include "regs-pmu.h" #include "common.h" @@ -70,7 +71,31 @@ static int exynos_cpu_powerup(unsigned int cpu, unsigned int cluster) cluster >= EXYNOS5420_NR_CLUSTERS) return -EINVAL; - exynos_cpu_power_up(cpunr); + if (!exynos_cpu_power_state(cpunr)) { + exynos_cpu_power_up(cpunr); + + /* + * This assumes the cluster number of the big cores(Cortex A15) + * is 0 and the Little cores(Cortex A7) is 1. + * When the system was booted from the Little core, + * they should be reset during power up cpu. + */ + if (cluster && + cluster == MPIDR_AFFINITY_LEVEL(cpu_logical_map(0), 1)) { + /* + * Before we reset the Little cores, we should wait + * the SPARE2 register is set to 1 because the init + * codes of the iROM will set the register after + * initialization. + */ + while (!pmu_raw_readl(S5P_PMU_SPARE2)) + udelay(10); + + pmu_raw_writel(EXYNOS5420_KFC_CORE_RESET(cpu), + EXYNOS_SWRESET); + } + } + return 0; } |