u-boot/arch/arm/mach-imx/mx2/Kconfig

if ARCH_MX25

config MX25
	bool
	default y
	select SYS_FSL_ERRATUM_ESDHC_A001
choice
	prompt "MX25 board select"
	optional

config TARGET_MX25PDK
	bool "Support mx25pdk"
	select BOARD_LATE_INIT
	select CPU_ARM926EJS
	select BOARD_EARLY_INIT_F

config TARGET_ZMX25
	bool "Support zmx25"
	select BOARD_LATE_INIT
	select CPU_ARM926EJS1

endchoice

config SYS_SOC
	default "mx25"

source "board/freescale/mx25pdk/Kconfig"
source "board/syteco/zmx25/Kconfig"

endif
mx25: Move MX25 selection to Kconfig The motivation for moving MX25 selection to Kconfig is to be able to better handle MX25 specific errata, so that an errata option can be selected at SoC level instead of board level. This selection method also aligns with the way other i.MX SoCs are selected in U-Boot. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Acked-by: Sebastien Bourdelin <sebastien.bourdelin@savoirfairelinux.com> Reviewed-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com> 2017-11-03 15:40:08 +00:00			`if ARCH_MX25`

			`config MX25`
			`bool`
			`default y`
mx25: Select the ESDHC_A001 erratum 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 2017-11-03 15:40:09 +00:00			`select SYS_FSL_ERRATUM_ESDHC_A001`
mx25: Move MX25 selection to Kconfig The motivation for moving MX25 selection to Kconfig is to be able to better handle MX25 specific errata, so that an errata option can be selected at SoC level instead of board level. This selection method also aligns with the way other i.MX SoCs are selected in U-Boot. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Acked-by: Sebastien Bourdelin <sebastien.bourdelin@savoirfairelinux.com> Reviewed-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com> 2017-11-03 15:40:08 +00:00			`choice`
			`prompt "MX25 board select"`
			`optional`

			`config TARGET_MX25PDK`
			`bool "Support mx25pdk"`
			`select BOARD_LATE_INIT`
			`select CPU_ARM926EJS`
			`select BOARD_EARLY_INIT_F`

			`config TARGET_ZMX25`
			`bool "Support zmx25"`
			`select BOARD_LATE_INIT`
			`select CPU_ARM926EJS1`

			`endchoice`

			`config SYS_SOC`
			`default "mx25"`

			`source "board/freescale/mx25pdk/Kconfig"`
			`source "board/syteco/zmx25/Kconfig"`

			`endif`