Hi Fabio,
On 08.01.2014 14:59, Fabio Estevam wrote:
From: Fabio Estevam <fabio.este...@freescale.com>
According to e9fd66defd (ARM: mx6: define CONFIG_ARM_ERRATA_742230), the
CONFIG_ARM_ERRATA_742230 option should only be applied to multi-core
variants, so restrict its usage for quad and dual-lite only.
Just for my understanding: Is there a technical reason not to use this
errata on single core (solo/sololite)? I.e. do you see any real issues
using this errata on solo/sololite?
Or is this patch "just out of formal" aspects? I.e. there are no
positive/negative issues seen on solo/sololite, but the documentation
tells that it shouldn't be used on solo/sololite, so disable it?
Best regards
Dirk
Quoting Shawn Guo [2]:
"The sololite has the same core version as dual/quad - r2p10. The
help text of erratum 742230 in kernel suggests that only version
r1p0..r2p2 are affected. So it sounds like the erratum 742230 should be
irrelevant to i.MX6 SoCs. However we were running into a reboot issue
on multi-core i.MX6 SoCs. There was a quite long discussion [1] about
it. Though we did not reach a conclusion in the thread, one ARM people
sent me a private message, suggesting this should be an ARM core issue
and workaround for erratum 742230 might help. And it turns out what he
said is true. And that's why I came up with the commit e9fd66defd (ARM:
mx6: define CONFIG_ARM_ERRATA_742230) to turn on the erratum for imx6
dual/quad.
Shawn
[1]
http://lists.infradead.org/pipermail/linux-arm-kernel/2012-August/thread.html#113096";
[2] http://lists.denx.de/pipermail/u-boot/2014-January/170424.html
Signed-off-by: Fabio Estevam <fabio.este...@freescale.com>
---
Changes since v1:
- Improve commit log
include/configs/mx6_common.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/include/configs/mx6_common.h b/include/configs/mx6_common.h
index 514d634..0b8db85 100644
--- a/include/configs/mx6_common.h
+++ b/include/configs/mx6_common.h
@@ -17,7 +17,9 @@
#ifndef __MX6_COMMON_H
#define __MX6_COMMON_H
+#if defined(CONFIG_MX6Q) || defined(CONFIG_MX6DL)
#define CONFIG_ARM_ERRATA_742230
+#endif
#define CONFIG_ARM_ERRATA_743622
#define CONFIG_ARM_ERRATA_751472
#define CONFIG_BOARD_POSTCLK_INIT
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