target/linux/ramips/patches-3.8/0003-MIPS-ralink-adds-reset-code.patch

   1 From c06e836ada59fbc6d1109277e693e5b3e056ac12 Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Sun, 20 Jan 2013 22:00:57 +0100
   4 Subject: [PATCH 03/14] MIPS: ralink: adds reset code
   5
   6 Resetting these SoCs requires no real magic. The code is straight forward.
   7
   8 Signed-off-by: John Crispin <blogic@openwrt.org>
   9 Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  10 Patchwork: http://patchwork.linux-mips.org/patch/4891/
  11 ---
  12  arch/mips/ralink/reset.c |   44 ++++++++++++++++++++++++++++++++++++++++++++
  13  1 file changed, 44 insertions(+)
  14  create mode 100644 arch/mips/ralink/reset.c
  15
  16 --- /dev/null
  17 +++ b/arch/mips/ralink/reset.c
  18 @@ -0,0 +1,44 @@
  19 +/*
  20 + * This program is free software; you can redistribute it and/or modify it
  21 + * under the terms of the GNU General Public License version 2 as published
  22 + * by the Free Software Foundation.
  23 + *
  24 + * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
  25 + * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
  26 + * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
  27 + */
  28 +
  29 +#include <linux/pm.h>
  30 +#include <linux/io.h>
  31 +
  32 +#include <asm/reboot.h>
  33 +
  34 +#include <asm/mach-ralink/ralink_regs.h>
  35 +
  36 +/* Reset Control */
  37 +#define SYSC_REG_RESET_CTRL     0x034
  38 +#define RSTCTL_RESET_SYSTEM     BIT(0)
  39 +
  40 +static void ralink_restart(char *command)
  41 +{
  42 +       local_irq_disable();
  43 +       rt_sysc_w32(RSTCTL_RESET_SYSTEM, SYSC_REG_RESET_CTRL);
  44 +       unreachable();
  45 +}
  46 +
  47 +static void ralink_halt(void)
  48 +{
  49 +       local_irq_disable();
  50 +       unreachable();
  51 +}
  52 +
  53 +static int __init mips_reboot_setup(void)
  54 +{
  55 +       _machine_restart = ralink_restart;
  56 +       _machine_halt = ralink_halt;
  57 +       pm_power_off = ralink_halt;
  58 +
  59 +       return 0;
  60 +}
  61 +
  62 +arch_initcall(mips_reboot_setup);