brcm47xx: fix reboot problem on BCM4705/BCM4785

[openwrt/svn-archive/archive.git] / target / linux / brcm47xx / patches-3.10 / 170-fix-74k-cpu.patch

diff --git a/target/linux/brcm47xx/patches-3.10/170-fix-74k-cpu.patch b/target/linux/brcm47xx/patches-3.10/170-fix-74k-cpu.patch
index 7715cf2bbca8177aefa22eb10d11d124e3db2929..2cdd887a182fc58fb945fa10abd8307e38971e06 100644 (file)
--- a/target/linux/brcm47xx/patches-3.10/170-fix-74k-cpu.patch
+++ b/target/linux/brcm47xx/patches-3.10/170-fix-74k-cpu.patch
@@ -1,12 +1,56 @@
---- a/arch/mips/kernel/idle.c
-+++ b/arch/mips/kernel/idle.c
-@@ -188,9 +188,6 @@ void __init check_wait(void)
-               break;
+From fb143ba7f7cd215bc2fc34a478c4c0b6dc56e537 Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke@hauke-m.de>
+Date: Mon, 6 Jan 2014 14:51:59 +0100
+Subject: [PATCH] MIPS: BCM47XX: fix position of cpu_wait disabling
+
+The disabling of cpu_wait was done too early, before the detection was
+done. This moves the code to a position where it actually works.
+
+Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+Acked-by: Rafa? Mi?ecki <zajec5@gmail.com>
+---
+ arch/mips/bcm47xx/setup.c |   34 +++++++++++++++++++++++++---------
+ 1 file changed, 25 insertions(+), 9 deletions(-)
+
+--- a/arch/mips/bcm47xx/setup.c
++++ b/arch/mips/bcm47xx/setup.c
+@@ -37,6 +37,7 @@
+ #include <asm/prom.h>
+ #include <asm/reboot.h>
+ #include <asm/time.h>
++#include <asm/idle.h>
+ #include <bcm47xx.h>
+ #include <bcm47xx_nvram.h>
+ #include <bcm47xx_board.h>
+@@ -243,6 +244,31 @@ void __init plat_mem_setup(void)
+       mips_set_machine_name(bcm47xx_board_get_name());
+ }
  
-       case CPU_74K:
--              cpu_wait = r4k_wait;
--              if ((c->processor_id & 0xff) >= PRID_REV_ENCODE_332(2, 1, 0))
--                      cpu_wait = r4k_wait_irqoff;
-               break;
- 
-       case CPU_TX49XX:
++static int __init bcm47xx_cpu_fixes(void)
++{
++      switch (bcm47xx_bus_type) {
++#ifdef CONFIG_BCM47XX_SSB
++      case BCM47XX_BUS_TYPE_SSB:
++              /* Nothing to do */
++              break;
++#endif
++#ifdef CONFIG_BCM47XX_BCMA
++      case BCM47XX_BUS_TYPE_BCMA:
++              /* The BCM4706 has a problem with the CPU wait instruction.
++               * When r4k_wait or r4k_wait_irqoff is used will just hang and
++               * not return from a msleep(). Removing the cpu_wait
++               * functionality is a workaround for this problem. The BCM4716
++               * does not have this problem.
++               */
++              if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706)
++                      cpu_wait = NULL;
++              break;
++#endif
++      }
++      return 0;
++}
++arch_initcall(bcm47xx_cpu_fixes);
++
+ static int __init bcm47xx_register_bus_complete(void)
+ {
+       switch (bcm47xx_bus_type) {