diff options
| author | Will Deacon <will.deacon@arm.com> | 2011-07-20 11:57:03 +0100 |
|---|---|---|
| committer | Nicolas Pitre <nicolas.pitre@linaro.org> | 2011-08-17 11:37:18 -0400 |
| commit | f47afad902c141ab6e79949f02c756ce977ce90c (patch) | |
| tree | 12190ce3b5a39ca03a54098b7e13798abc43a657 | |
| parent | e150c289a73089aaa273bf0c3803730b326cd9d1 (diff) | |
ARM: realview: ensure visibility of writes during reset
The various reset routines in mach-realview rely on an FPGA to
power-cycle the board after writing some magic runes to memory-mapped
registers.
This patch adds a dsb() following the writes, so that they become
visible before we mdelay(1000) in the arch_reset code. Without this
patch, the timeout would expire sporadically, causing the reset to fail.
Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from commit 5cb843ca0f781b62dc9793b26926d0b8efef5576)
| -rw-r--r-- | arch/arm/mach-realview/include/mach/system.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/mach-realview/include/mach/system.h b/arch/arm/mach-realview/include/mach/system.h index a30f2e3ec17..6657ff23116 100644 --- a/arch/arm/mach-realview/include/mach/system.h +++ b/arch/arm/mach-realview/include/mach/system.h @@ -44,6 +44,7 @@ static inline void arch_reset(char mode, const char *cmd) */ if (realview_reset) realview_reset(mode); + dsb(); } #endif |