[mirror_ubuntu-hirsute-kernel.git] / arch / arm / mach-omap2 / ti81xx-restart.c

// SPDX-License-Identifier: GPL-2.0-only
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/reboot.h>

#include "iomap.h"
#include "common.h"
#include "control.h"
#include "prm3xxx.h"

#define TI81XX_PRM_DEVICE_RSTCTRL	0x00a0
#define TI81XX_GLOBAL_RST_COLD		BIT(1)

/**
 * ti81xx_restart - trigger a software restart of the SoC
 * @mode: the "reboot mode", see arch/arm/kernel/{setup,process}.c
 * @cmd: passed from the userspace program rebooting the system (if provided)
 *
 * Resets the SoC.  For @cmd, see the 'reboot' syscall in
 * kernel/sys.c.  No return value.
 *
 * NOTE: Warm reset does not seem to work, may require resetting
 * clocks to bypass mode.
 */
void ti81xx_restart(enum reboot_mode mode, const char *cmd)
{
	omap2_prm_set_mod_reg_bits(TI81XX_GLOBAL_RST_COLD, 0,
				   TI81XX_PRM_DEVICE_RSTCTRL);
	while (1);
}
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
bc7235c9 TL	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	*/
	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	}