14e067c1a5
Add restart hook so that DTS based AM33xx builds can restart the platform. Tested-by: Nishanth Menon <nm@ti.com> Signed-off-by: Jean-Sebastien A. Beaudry <jsabeaudry@handyem.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
35 lines
1,015 B
C
35 lines
1,015 B
C
/*
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* am33xx-restart.c - Code common to all AM33xx machines.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include "common.h"
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#include "prm-regbits-33xx.h"
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#include "prm33xx.h"
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/**
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* am3xx_restart - trigger a software restart of the SoC
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* @mode: the "reboot mode", see arch/arm/kernel/{setup,process}.c
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* @cmd: passed from the userspace program rebooting the system (if provided)
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*
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* Resets the SoC. For @cmd, see the 'reboot' syscall in
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* kernel/sys.c. No return value.
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*/
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void am33xx_restart(char mode, const char *cmd)
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{
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/* TODO: Handle mode and cmd if necessary */
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am33xx_prm_rmw_reg_bits(AM33XX_GLOBAL_WARM_SW_RST_MASK,
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AM33XX_GLOBAL_WARM_SW_RST_MASK,
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AM33XX_PRM_DEVICE_MOD,
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AM33XX_PRM_RSTCTRL_OFFSET);
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/* OCP barrier */
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(void)am33xx_prm_read_reg(AM33XX_PRM_DEVICE_MOD,
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AM33XX_PRM_RSTCTRL_OFFSET);
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}
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