diff options
| author | Hauke Mehrtens <hauke@hauke-m.de> | 2014-08-18 22:01:16 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-08-19 13:30:47 +0200 |
| commit | 2727cab25a26a0e65e8d9d247ba5a8e9b3e552c7 (patch) | |
| tree | 6ae71661690c3a8ed8ef88a4481b10ac75000ba8 /arch/mips/bcm47xx/setup.c | |
| parent | 92d01f71c86a02c6e224b3e74f2368def3be1dfb (diff) | |
| download | linux-2727cab25a26a0e65e8d9d247ba5a8e9b3e552c7.tar.bz2 | |
MIPS: BCM47XX: Fix reboot problem on BCM4705/BCM4785
This adds some code based on code from the Broadcom GPL tar to fix the
reboot problems on BCM4705/BCM4785. I tried rebooting my device for ~10
times and have never seen a problem. This reverts the changes in the
previous commit and adds the real fix as suggested by Rafał.
Setting bit 22 in Reg 22, sel 4 puts the BIU (Bus Interface Unit) into
async mode.
The previous commit was 316cad5c1d4daee998cd1f83ccdb437f6f20d45c [MIPS:
BCM47XX: make reboot more relaiable]
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Cc: jogo@openwrt.org
Cc: zajec5@gmail.com
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7545/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/bcm47xx/setup.c')
| -rw-r--r-- | arch/mips/bcm47xx/setup.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/arch/mips/bcm47xx/setup.c b/arch/mips/bcm47xx/setup.c index 2b63e7e7d3d3..ad439c273003 100644 --- a/arch/mips/bcm47xx/setup.c +++ b/arch/mips/bcm47xx/setup.c @@ -59,12 +59,21 @@ static void bcm47xx_machine_restart(char *command) switch (bcm47xx_bus_type) { #ifdef CONFIG_BCM47XX_SSB case BCM47XX_BUS_TYPE_SSB: - ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 3); + if (bcm47xx_bus.ssb.chip_id == 0x4785) + write_c0_diag4(1 << 22); + ssb_watchdog_timer_set(&bcm47xx_bus.ssb, 1); + if (bcm47xx_bus.ssb.chip_id == 0x4785) { + __asm__ __volatile__( + ".set\tmips3\n\t" + "sync\n\t" + "wait\n\t" + ".set\tmips0"); + } break; #endif #ifdef CONFIG_BCM47XX_BCMA case BCM47XX_BUS_TYPE_BCMA: - bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 3); + bcma_chipco_watchdog_timer_set(&bcm47xx_bus.bcma.bus.drv_cc, 1); break; #endif } |