3. Transcend 8G class 10 SDHC card has some compatibility issue. It is observed it could not work on 50 MHz high-speed
mode on LS2 boards, but other brand SD cards (Sandisk, Kingston, Sony ...) worked fine. Reducing SD clock frequency
could also resolve the issue. The workaround is using other kind SD cards instead.
4. After sleep of LS1046ARDB, the card will get below interrupt timeout issue. This is hardware issue. CMD18 (multiple blocks
read) has hardware interrupt timeout issue.
mmc0: Timeout waiting for hardware interrupt.
5. Linux MMC stack does not have SD UHS-II support currently. It could not handle SD UHS-II card well. If UHS-I support is
enabled in eSDHC dts node, the driver may make SD UHS-II card enter 1.8v mode. Only a power cycle could reset the
card, so use power off/on instead of reset for SD UHS-II card if UHS-I support is enabled in eSDHC dts node.
6. For LS1012ARDB RevD and later versions, I2C reading for DIP switch setting is not reliable so U-Boot could not enable/
disable SDHC2 automatically. If SDHC2 is used, "esdhc1" should be set in U-Boot hwconfig environment to enable it
manually.
4.2.3 IEEE 1588
Description
From IEEE-1588 perspective, the components required are:
1. IEEE-1588 extensions to the ENETC driver and Felix switch driver.
2. A stack application for IEEE-1588 protocol.
IEEE 1588 device driver supports either kernel built-in or module.
Kernel Configure Options
Tree View
1. ENETC
Kernel Configure Tree View Options
Description
Device Drivers --->
[*] Network device support --->
[*] Ethernet driver support --->
[*] Freescale devices
<*> ENETC PF driver
-*- ENETC PTP clock driver
[*] ENETC hardware timestamping support
Enable 1588 driver for ENETC
2. Felix switch
Kernel Configure Tree View Options
Description
Device Drivers --->
[*] Network device support --->
[*] Ethernet driver support --->
[*] Microsemi devices
Enable 1588 driver for Felix switch
Linux kernel
Layerscape LS1028A BSP User Guide, Rev. 0.3, 04/2019
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NXP Semiconductors
Summary of Contents for Layerscape LS1028A BSP
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