target/linux/ramips/patches-4.3/0018-arch-mips-ralink-reset-pci-prior-to-reboot.patch

   1 From d3c1e72c755cf67427b5d410039a096520d6537f Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Mon, 7 Dec 2015 17:19:55 +0100
   4 Subject: [PATCH 18/53] arch: mips: ralink: reset pci prior to reboot
   5
   6 Signed-off-by: John Crispin <blogic@openwrt.org>
   7 ---
   8  arch/mips/ralink/reset.c |   12 ++++++++++--
   9  1 file changed, 10 insertions(+), 2 deletions(-)
  10
  11 --- a/arch/mips/ralink/reset.c
  12 +++ b/arch/mips/ralink/reset.c
  13 @@ -11,6 +11,7 @@
  14  #include <linux/pm.h>
  15  #include <linux/io.h>
  16  #include <linux/of.h>
  17 +#include <linux/delay.h>
  18  #include <linux/reset-controller.h>
  19
  20  #include <asm/reboot.h>
  21 @@ -18,8 +19,10 @@
  22  #include <asm/mach-ralink/ralink_regs.h>
  23
  24  /* Reset Control */
  25 -#define SYSC_REG_RESET_CTRL     0x034
  26 -#define RSTCTL_RESET_SYSTEM     BIT(0)
  27 +#define SYSC_REG_RESET_CTRL    0x034
  28 +
  29 +#define RSTCTL_RESET_PCI       BIT(26)
  30 +#define RSTCTL_RESET_SYSTEM    BIT(0)
  31
  32  static int ralink_assert_device(struct reset_controller_dev *rcdev,
  33                                 unsigned long id)
  34 @@ -83,6 +86,11 @@ void ralink_rst_init(void)
  35
  36  static void ralink_restart(char *command)
  37  {
  38 +       if (IS_ENABLED(CONFIG_PCI)) {
  39 +               rt_sysc_m32(0, RSTCTL_RESET_PCI, SYSC_REG_RESET_CTRL);
  40 +               mdelay(50);
  41 +       }
  42 +
  43         local_irq_disable();
  44         rt_sysc_w32(RSTCTL_RESET_SYSTEM, SYSC_REG_RESET_CTRL);
  45         unreachable();