diff options
Diffstat (limited to 'arch/arm/plat-s3c24xx/cpu.c')
| -rw-r--r-- | arch/arm/plat-s3c24xx/cpu.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/arm/plat-s3c24xx/cpu.c b/arch/arm/plat-s3c24xx/cpu.c index f513ab083b8..f5699cadb0c 100644 --- a/arch/arm/plat-s3c24xx/cpu.c +++ b/arch/arm/plat-s3c24xx/cpu.c @@ -28,15 +28,19 @@ #include <linux/ioport.h> #include <linux/serial_core.h> #include <linux/platform_device.h> +#include <linux/delay.h> #include <asm/hardware.h> #include <asm/irq.h> #include <asm/io.h> #include <asm/delay.h> +#include <asm/cacheflush.h> #include <asm/mach/arch.h> #include <asm/mach/map.h> +#include <asm/arch/system-reset.h> + #include <asm/arch/regs-gpio.h> #include <asm/plat-s3c/regs-serial.h> @@ -203,6 +207,27 @@ static unsigned long s3c24xx_read_idcode_v4(void) #endif } +/* Hook for arm_pm_restart to ensure we execute the reset code + * with the caches enabled. It seems at least the S3C2440 has a problem + * resetting if there is bus activity interrupted by the reset. + */ +static void s3c24xx_pm_restart(char mode) +{ + if (mode != 's') { + unsigned long flags; + + local_irq_save(flags); + __cpuc_flush_kern_all(); + __cpuc_flush_user_all(); + + arch_reset(mode); + local_irq_restore(flags); + } + + /* fallback, or unhandled */ + arm_machine_restart(mode); +} + void __init s3c24xx_init_io(struct map_desc *mach_desc, int size) { unsigned long idcode = 0x0; @@ -230,6 +255,8 @@ void __init s3c24xx_init_io(struct map_desc *mach_desc, int size) panic("Unsupported S3C24XX CPU"); } + arm_pm_restart = s3c24xx_pm_restart; + (cpu->map_io)(mach_desc, size); } |