From: Fabio Estevam <festevam@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v3 2/3] mx25: Select the ESDHC_A001 erratum
Date: Fri, 3 Nov 2017 13:40:09 -0200 [thread overview]
Message-ID: <1509723610-27434-2-git-send-email-festevam@gmail.com> (raw)
In-Reply-To: <1509723610-27434-1-git-send-email-festevam@gmail.com>
From: Fabio Estevam <fabio.estevam@nxp.com>
When a high speed card is connected to mx25 the following error is seen:
U-Boot 2017.11-rc2-00104-gb79372a (Oct 31 2017 - 11:02:22 -0200)
CPU: Freescale i.MX25 rev1.2 at 399 MHz
Reset cause: POR
Board: MX25PDK
I2C: ready
DRAM: 64 MiB
No arch specific invalidate_icache_all available!
MMC: FSL_SDHC: 0
*** Warning - read failed, using default environment
In: serial
Out: serial
Err: serial
Net: FEC
Hit any key to stop autoboot: 0
=> saveenv
Saving Environment to MMC...
Writing to MMC(0)... failed
, which prevents any usage of the SD card.
The root cause for the failure is the eSDHC-A001 erratum:
"eSDHC-A001 : Data timeout counter (SYSCTL[DTOCV]) is not reliable for
values of 0x4,0x8, and 0xC" that is listed
on some PowerArchitecture chips:
https://www.nxp.com/files-static/32bit/doc/errata/MPC8379ECE.pdf
Even though eSDHC-A001 is not documented on the i.MX25 errata document,
I have confirmed with the NXP design team that this erratum does affect
i.MX25, so fix the problem by selecting SYS_FSL_ERRATUM_ESDHC_A001
at SoC level.
Successfully tested with a high speed SD card on a mx25pdk board.
Suggested-by: Benoît Thébaudeau <benoit@wsystem.com>
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Acked-by: Sebastien Bourdelin <sebastien.bourdelin@savoirfairelinux.com>
---
Changes since v2:
- Put the U-Boot list on Cc.
Changes since v1:
- Remove duplicated paragraph.
arch/arm/mach-imx/mx2/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/mach-imx/mx2/Kconfig b/arch/arm/mach-imx/mx2/Kconfig
index 5e985a6..ea308fc 100644
--- a/arch/arm/mach-imx/mx2/Kconfig
+++ b/arch/arm/mach-imx/mx2/Kconfig
@@ -3,6 +3,7 @@ if ARCH_MX25
config MX25
bool
default y
+ select SYS_FSL_ERRATUM_ESDHC_A001
choice
prompt "MX25 board select"
optional
--
2.7.4
next prev parent reply other threads:[~2017-11-03 15:40 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-03 15:40 [U-Boot] [PATCH v3 1/3] mx25: Move MX25 selection to Kconfig Fabio Estevam
2017-11-03 15:40 ` Fabio Estevam [this message]
2017-11-03 19:48 ` [U-Boot] [PATCH v3 2/3] mx25: Select the ESDHC_A001 erratum Otavio Salvador
2017-11-03 15:40 ` [U-Boot] [PATCH v3 3/3] mx51: " Fabio Estevam
2017-11-03 21:21 ` [U-Boot] [PATCH v3 1/3] mx25: Move MX25 selection to Kconfig Benoît Thébaudeau
2017-11-06 23:44 ` Fabio Estevam
2017-11-07 1:22 ` Tom Rini
2017-11-07 9:10 ` Stefano Babic
2017-11-10 20:19 ` Benoît Thébaudeau
2017-11-10 20:47 ` Fabio Estevam
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