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  */
ti81xx_restart(enum reboot_mode mode,const char * cmd)25 void 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