From 14e067c1a5280fe6fe5d3348a0bae87bc4da16db Mon Sep 17 00:00:00 2001 From: "Jean-Sebastien A. Beaudry" Date: Wed, 23 Jan 2013 16:02:40 -0500 Subject: 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 Signed-off-by: Jean-Sebastien A. Beaudry Signed-off-by: Tony Lindgren --- arch/arm/mach-omap2/am33xx-restart.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 arch/arm/mach-omap2/am33xx-restart.c (limited to 'arch/arm/mach-omap2/am33xx-restart.c') diff --git a/arch/arm/mach-omap2/am33xx-restart.c b/arch/arm/mach-omap2/am33xx-restart.c new file mode 100644 index 000000000000..88e4fa8af031 --- /dev/null +++ b/arch/arm/mach-omap2/am33xx-restart.c @@ -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 + +#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); +} -- cgit