LXR linux/arch/arm/mach-omap2/ti81xx-restart.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2#include <linux/kernel.h>
   3#include <linux/init.h>
   4#include <linux/reboot.h>
   5
   6#include "iomap.h"
   7#include "common.h"
   8#include "control.h"
   9#include "prm3xxx.h"
  10
  11#define TI81XX_PRM_DEVICE_RSTCTRL       0x00a0
  12#define TI81XX_GLOBAL_RST_COLD          BIT(1)
  13
  14/**
  15 * ti81xx_restart - trigger a software restart of the SoC
  16 * @mode: the "reboot mode", see arch/arm/kernel/{setup,process}.c
  17 * @cmd: passed from the userspace program rebooting the system (if provided)
  18 *
  19 * Resets the SoC.  For @cmd, see the 'reboot' syscall in
  20 * kernel/sys.c.  No return value.
  21 *
  22 * NOTE: Warm reset does not seem to work, may require resetting
  23 * clocks to bypass mode.
  24 */
  25void ti81xx_restart(enum reboot_mode mode, const char *cmd)
  26{
  27        omap2_prm_set_mod_reg_bits(TI81XX_GLOBAL_RST_COLD, 0,
  28                                   TI81XX_PRM_DEVICE_RSTCTRL);
  29        while (1);
  30}
  31