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TOMOYO Linux Cross Reference
Linux/arch/arm/mach-omap2/ti81xx-restart.c

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  1 /*
  2  * This program is free software; you can redistribute it and/or modify
  3  * it under the terms of the GNU General Public License version 2 as
  4  * published by the Free Software Foundation.
  5  */
  6 #include <linux/kernel.h>
  7 #include <linux/init.h>
  8 #include <linux/reboot.h>
  9 
 10 #include "iomap.h"
 11 #include "common.h"
 12 #include "control.h"
 13 #include "prm3xxx.h"
 14 
 15 #define TI81XX_PRM_DEVICE_RSTCTRL       0x00a0
 16 #define TI81XX_GLOBAL_RST_COLD          BIT(1)
 17 
 18 /**
 19  * ti81xx_restart - trigger a software restart of the SoC
 20  * @mode: the "reboot mode", see arch/arm/kernel/{setup,process}.c
 21  * @cmd: passed from the userspace program rebooting the system (if provided)
 22  *
 23  * Resets the SoC.  For @cmd, see the 'reboot' syscall in
 24  * kernel/sys.c.  No return value.
 25  *
 26  * NOTE: Warm reset does not seem to work, may require resetting
 27  * clocks to bypass mode.
 28  */
 29 void ti81xx_restart(enum reboot_mode mode, const char *cmd)
 30 {
 31         omap2_prm_set_mod_reg_bits(TI81XX_GLOBAL_RST_COLD, 0,
 32                                    TI81XX_PRM_DEVICE_RSTCTRL);
 33         while (1);
 34 }
 35 

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