ralink: add proper reset of pci core

Signed-off-by: John Crispin <blogic@openwrt.org>
SVN-Revision: 43370

diff --git a/target/linux/ramips/patches-3.14/999-pci-reset.patch b/target/linux/ramips/patches-3.14/999-pci-reset.patch
new file mode 100644 (file)
index 0000000..8e85890
--- /dev/null
+++ b/target/linux/ramips/patches-3.14/999-pci-reset.patch
@@ -0,0 +1,29 @@
+Index: linux-3.14.18/arch/mips/ralink/reset.c
+===================================================================
+--- linux-3.14.18.orig/arch/mips/ralink/reset.c        2014-11-23 00:32:23.268612766 +0100
++++ linux-3.14.18/arch/mips/ralink/reset.c     2014-11-23 01:13:46.850117349 +0100
+@@ -18,8 +18,10 @@
+ #include <asm/mach-ralink/ralink_regs.h>
+ 
+ /* Reset Control */
+-#define SYSC_REG_RESET_CTRL     0x034
+-#define RSTCTL_RESET_SYSTEM     BIT(0)
++#define SYSC_REG_RESET_CTRL   0x034
++
++#define RSTCTL_RESET_PCI      BIT(26)
++#define RSTCTL_RESET_SYSTEM   BIT(0)
+ 
+ static int ralink_assert_device(struct reset_controller_dev *rcdev,
+                               unsigned long id)
+@@ -83,6 +85,11 @@
+ 
+ static void ralink_restart(char *command)
+ {
++      if (IS_ENABLED(CONFIG_PCI)) {
++              rt_sysc_m32(0, RSTCTL_RESET_PCI, SYSC_REG_RESET_CTRL);
++              mdelay(50);
++      }
++
+       local_irq_disable();
+       rt_sysc_w32(RSTCTL_RESET_SYSTEM, SYSC_REG_RESET_CTRL);
+       unreachable();