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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> Acked-by: Otavio Salvador <otavio@ossystems.com.br> Tested-by: Otavio Salvador <otavio@ossystems.com.br> # mx25pdk
30 lines
461 B
Text
30 lines
461 B
Text
if ARCH_MX25
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config MX25
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bool
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default y
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select SYS_FSL_ERRATUM_ESDHC_A001
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choice
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prompt "MX25 board select"
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optional
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config TARGET_MX25PDK
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bool "Support mx25pdk"
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select BOARD_LATE_INIT
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select CPU_ARM926EJS
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select BOARD_EARLY_INIT_F
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config TARGET_ZMX25
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bool "Support zmx25"
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select BOARD_LATE_INIT
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select CPU_ARM926EJS1
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endchoice
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config SYS_SOC
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default "mx25"
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source "board/freescale/mx25pdk/Kconfig"
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source "board/syteco/zmx25/Kconfig"
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endif
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