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ARM: OMAP2+: AM33xx: Add SoC specific restart hook 

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>
This commit is contained in:
Jean-Sebastien A. Beaudry 2013-01-23 16:02:40 -05:00 committed by Tony Lindgren
parent 88b62b915b
commit 14e067c1a5
4 changed files with 44 additions and 0 deletions
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1
arch/arm/mach-omap2/Makefile
View File

@ -53,6 +53,7 @@ AFLAGS_sram34xx.o :=-Wa,-march=armv7-a
# Restart code (OMAP4/5 currently in omap4-common.c)
obj-$(CONFIG_SOC_OMAP2420) += omap2-restart.o
obj-$(CONFIG_SOC_OMAP2430) += omap2-restart.o
obj-$(CONFIG_SOC_AM33XX) += am33xx-restart.o
obj-$(CONFIG_ARCH_OMAP3) += omap3-restart.o
# Pin multiplexing

34
arch/arm/mach-omap2/am33xx-restart.c Normal file
View File

@ -0,0 +1,34 @@
/*
* am33xx-restart.c - Code common to all AM33xx machines.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include "common.h"
#include "prm-regbits-33xx.h"
#include "prm33xx.h"
/**
* am3xx_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.
*/
void am33xx_restart(char mode, const char *cmd)
{
/* TODO: Handle mode and cmd if necessary */
am33xx_prm_rmw_reg_bits(AM33XX_GLOBAL_WARM_SW_RST_MASK,
AM33XX_GLOBAL_WARM_SW_RST_MASK,
AM33XX_PRM_DEVICE_MOD,
AM33XX_PRM_RSTCTRL_OFFSET);
/* OCP barrier */
(void)am33xx_prm_read_reg(AM33XX_PRM_DEVICE_MOD,
AM33XX_PRM_RSTCTRL_OFFSET);
}

1
arch/arm/mach-omap2/board-generic.c
View File

@ -141,6 +141,7 @@ DT_MACHINE_START(AM33XX_DT, "Generic AM33XX (Flattened Device Tree)")
.init_machine = omap_generic_init,
.timer = &omap3_am33xx_timer,
.dt_compat = am33xx_boards_compat,
.restart = am33xx_restart,
MACHINE_END
#endif

8
arch/arm/mach-omap2/common.h
View File

@ -119,6 +119,14 @@ static inline void omap2xxx_restart(char mode, const char *cmd)
}
#endif
#ifdef CONFIG_SOC_AM33XX
void am33xx_restart(char mode, const char *cmd);
#else
static inline void am33xx_restart(char mode, const char *cmd)
{
}
#endif
#ifdef CONFIG_ARCH_OMAP3
void omap3xxx_restart(char mode, const char *cmd);
#else