System Reboot from device driver - programmable
#include <linux/reboot.h>
#ifdef CONFIG_MACH_RK3066_R306
kernel_restart(LINUX_REBOOT_CMD_RESTART);
#endif
[ path : kernel/include/linux/reboot.h ]
15 /*
16 * Commands accepted by the _reboot() system call.
17 *
18 * RESTART Restart system using default command and mode.
19 * HALT Stop OS and give system control to ROM monitor, if any.
20 * CAD_ON Ctrl-Alt-Del sequence causes RESTART command.
21 * CAD_OFF Ctrl-Alt-Del sequence sends SIGINT to init task.
22 * POWER_OFF Stop OS and remove all power from system, if possible.
23 * RESTART2 Restart system using given command string.
24 * SW_SUSPEND Suspend system using software suspend if compiled in.
25 * KEXEC Restart system using a previously loaded Linux kernel
26 */
27
28 #define LINUX_REBOOT_CMD_RESTART 0x01234567
29 #define LINUX_REBOOT_CMD_HALT 0xCDEF0123
30 #define LINUX_REBOOT_CMD_CAD_ON 0x89ABCDEF
31 #define LINUX_REBOOT_CMD_CAD_OFF 0x00000000
32 #define LINUX_REBOOT_CMD_POWER_OFF 0x4321FEDC
33 #define LINUX_REBOOT_CMD_RESTART2 0xA1B2C3D4
34 #define LINUX_REBOOT_CMD_SW_SUSPEND 0xD000FCE2
35 #define LINUX_REBOOT_CMD_KEXEC 0x45584543
[ path : kernel/kernel/sys.c ]
338 /**
339 * kernel_restart - reboot the system
340 * @cmd: pointer to buffer containing command to execute for restart
341 * or %NULL
342 *
343 * Shutdown everything and perform a clean reboot.
344 * This is not safe to call in interrupt context.
345 */
346 void kernel_restart(char *cmd)
347 {
348 /*
349 * debug trace
350 */
351 restart_dbg("%s->%d->cmd=%s",__FUNCTION__,__LINE__,cmd);
352
353 kernel_restart_prepare(cmd);
354 disable_nonboot_cpus();
355 if (!cmd)
356 printk(KERN_EMERG "Restarting system.\n");
357 else
358 printk(KERN_EMERG "Restarting system with command '%s'.\n", cmd);
359 kmsg_dump(KMSG_DUMP_RESTART);
360 machine_restart(cmd);
361 }
362 EXPORT_SYMBOL_GPL(kernel_restart);
