diff options
Diffstat (limited to 'kernel/arch/arm/mach-berlin')
| -rw-r--r-- | kernel/arch/arm/mach-berlin/Kconfig | 1 | ||||
| -rw-r--r-- | kernel/arch/arm/mach-berlin/berlin.c | 6 | ||||
| -rw-r--r-- | kernel/arch/arm/mach-berlin/platsmp.c | 38 |
3 files changed, 42 insertions, 3 deletions
diff --git a/kernel/arch/arm/mach-berlin/Kconfig b/kernel/arch/arm/mach-berlin/Kconfig index 3e40a947f..742d53a5f 100644 --- a/kernel/arch/arm/mach-berlin/Kconfig +++ b/kernel/arch/arm/mach-berlin/Kconfig @@ -6,6 +6,7 @@ menuconfig ARCH_BERLIN select DW_APB_ICTL select DW_APB_TIMER_OF select GENERIC_IRQ_CHIP + select MFD_SYSCON select PINCTRL if ARCH_BERLIN diff --git a/kernel/arch/arm/mach-berlin/berlin.c b/kernel/arch/arm/mach-berlin/berlin.c index ac181c679..25d73870c 100644 --- a/kernel/arch/arm/mach-berlin/berlin.c +++ b/kernel/arch/arm/mach-berlin/berlin.c @@ -18,6 +18,11 @@ #include <asm/hardware/cache-l2x0.h> #include <asm/mach/arch.h> +static void __init berlin_init_late(void) +{ + platform_device_register_simple("cpufreq-dt", -1, NULL, 0); +} + static const char * const berlin_dt_compat[] = { "marvell,berlin", NULL, @@ -25,6 +30,7 @@ static const char * const berlin_dt_compat[] = { DT_MACHINE_START(BERLIN_DT, "Marvell Berlin") .dt_compat = berlin_dt_compat, + .init_late = berlin_init_late, /* * with DT probing for L2CCs, berlin_init_machine can be removed. * Note: 88DE3005 (Armada 1500-mini) uses pl310 l2cc diff --git a/kernel/arch/arm/mach-berlin/platsmp.c b/kernel/arch/arm/mach-berlin/platsmp.c index 34a3753e7..405cd37e4 100644 --- a/kernel/arch/arm/mach-berlin/platsmp.c +++ b/kernel/arch/arm/mach-berlin/platsmp.c @@ -14,10 +14,16 @@ #include <linux/of_address.h> #include <asm/cacheflush.h> +#include <asm/cp15.h> #include <asm/smp_plat.h> #include <asm/smp_scu.h> -#define CPU_RESET 0x00 +/* + * There are two reset registers, one with self-clearing (SC) + * reset and one with non-self-clearing reset (NON_SC). + */ +#define CPU_RESET_SC 0x00 +#define CPU_RESET_NON_SC 0x20 #define RESET_VECT 0x00 #define SW_RESET_ADDR 0x94 @@ -30,9 +36,11 @@ static inline void berlin_perform_reset_cpu(unsigned int cpu) { u32 val; - val = readl(cpu_ctrl + CPU_RESET); + val = readl(cpu_ctrl + CPU_RESET_NON_SC); + val &= ~BIT(cpu_logical_map(cpu)); + writel(val, cpu_ctrl + CPU_RESET_NON_SC); val |= BIT(cpu_logical_map(cpu)); - writel(val, cpu_ctrl + CPU_RESET); + writel(val, cpu_ctrl + CPU_RESET_NON_SC); } static int berlin_boot_secondary(unsigned int cpu, struct task_struct *idle) @@ -91,8 +99,32 @@ unmap_scu: iounmap(scu_base); } +#ifdef CONFIG_HOTPLUG_CPU +static void berlin_cpu_die(unsigned int cpu) +{ + v7_exit_coherency_flush(louis); + while (1) + cpu_do_idle(); +} + +static int berlin_cpu_kill(unsigned int cpu) +{ + u32 val; + + val = readl(cpu_ctrl + CPU_RESET_NON_SC); + val &= ~BIT(cpu_logical_map(cpu)); + writel(val, cpu_ctrl + CPU_RESET_NON_SC); + + return 1; +} +#endif + static struct smp_operations berlin_smp_ops __initdata = { .smp_prepare_cpus = berlin_smp_prepare_cpus, .smp_boot_secondary = berlin_boot_secondary, +#ifdef CONFIG_HOTPLUG_CPU + .cpu_die = berlin_cpu_die, + .cpu_kill = berlin_cpu_kill, +#endif }; CPU_METHOD_OF_DECLARE(berlin_smp, "marvell,berlin-smp", &berlin_smp_ops); |