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[U-Boot,v3,3/3] mx51: Select the ESDHC_A001 erratum

Message ID 1509723610-27434-3-git-send-email-festevam@gmail.com
State Accepted
Commit b2e6ad451b193e848c2736299ec59389449f3d12
Delegated to: Stefano Babic
Headers show
Series [U-Boot,v3,1/3] mx25: Move MX25 selection to Kconfig | expand

Commit Message

Fabio Estevam Nov. 3, 2017, 3:40 p.m. UTC 
From: Fabio Estevam <fabio.estevam@nxp.com>

When a high speed card is connected to mx51evk the following error is seen:

U-Boot 2017.11-rc2 (Oct 18 2017 - 13:49:26 -0200)

CPU:   Freescale i.MX51 rev3.0 at 800 MHz
Reset cause: POR
Board: MX51EVK
DRAM:  512 MiB
MMC:   FSL_SDHC: 0, FSL_SDHC: 1
*** 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

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.MX51 errata document,
I have confirmed with the NXP design team that this erratum does affect
i.MX51, so fix the problem by selecting SYS_FSL_ERRATUM_ESDHC_A001
at SoC level.

The i.MX51 ts4800 board already selects this option, but it is better
to move this selection to the i.MX51 SoC level instead.

Successfully tested with a high speed SD card on a mx51evk board.

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:
- None

 arch/arm/mach-imx/mx5/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/arm/mach-imx/mx5/Kconfig b/arch/arm/mach-imx/mx5/Kconfig
index ef37c35..d96020d 100644
--- a/arch/arm/mach-imx/mx5/Kconfig
+++ b/arch/arm/mach-imx/mx5/Kconfig
@@ -6,6 +6,7 @@  config MX5
 
 config MX51
 	bool
+	select SYS_FSL_ERRATUM_ESDHC_A001
 
 config MX53
 	bool
@@ -52,7 +53,6 @@  config TARGET_MX53SMD
 config TARGET_TS4800
 	bool "Support TS4800"
 	select MX51
-	select SYS_FSL_ERRATUM_ESDHC_A001
 
 config TARGET_USBARMORY
 	bool "Support USB armory"