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brcm47xx: deactivate mips wait instruction only for BCM4706

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The wait instruction is only broken on the BCM4706 and not on the other
similar SoCs.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

SVN-Revision: 38979
This commit is contained in:
Hauke Mehrtens 2013-12-01 18:05:08 +00:00
parent cbbfc5f1e6
commit c48f285147
3 changed files with 27 additions and 13 deletions
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34
target/linux/brcm47xx/patches-3.10/170-fix-74k-cpu.patch
View file

@ -1,12 +1,26 @@
--- a/arch/mips/kernel/idle.c
+++ b/arch/mips/kernel/idle.c
@@ -188,9 +188,6 @@ void __init check_wait(void)
break;
--- a/arch/mips/bcm47xx/setup.c
+++ b/arch/mips/bcm47xx/setup.c
@@ -35,6 +35,7 @@
#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>
@@ -214,6 +215,15 @@ static void __init bcm47xx_register_bcma
panic("Failed to initialize BCMA bus (err %d)", err);
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;
bcm47xx_fill_bcma_boardinfo(&bcm47xx_bus.bcma.bus.boardinfo, NULL);
+
+ /* 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;
}
#endif
case CPU_TX49XX:

4
target/linux/brcm47xx/patches-3.10/830-huawei_e970_support.patch
View file

@ -8,7 +8,7 @@
#include <asm/bootinfo.h>
#include <asm/prom.h>
#include <asm/reboot.h>
@@ -244,6 +245,33 @@ void __init plat_mem_setup(void)
@@ -254,6 +255,33 @@ void __init plat_mem_setup(void)
mips_set_machine_name(bcm47xx_board_get_name());
}
@ -42,7 +42,7 @@
static int __init bcm47xx_register_bus_complete(void)
{
switch (bcm47xx_bus_type) {
@@ -258,6 +286,8 @@ static int __init bcm47xx_register_bus_c
@@ -268,6 +296,8 @@ static int __init bcm47xx_register_bus_c
break;
#endif
}

2
target/linux/brcm47xx/patches-3.10/980-wnr834b_no_cardbus_invariant.patch
View file

@ -1,6 +1,6 @@
--- a/arch/mips/bcm47xx/setup.c
+++ b/arch/mips/bcm47xx/setup.c
@@ -121,6 +121,10 @@ static int bcm47xx_get_invariants(struct
@@ -122,6 +122,10 @@ static int bcm47xx_get_invariants(struct
if (bcm47xx_nvram_getenv("cardbus", buf, sizeof(buf)) >= 0)
iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10);