Tony Lindgren | bc7235c | 2015-01-14 17:37:16 -0800 | [diff] [blame] | 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 | } |