NXP Semiconductors Layerscape LS1028A BSP, User Manual, Page: 45 / 136

Source File Description
drivers/mmc/host/sdhci.c Linux SDHCI driver support
drivers/mmc/host/sdhci-pltfm.c Linux SDHCI platform devices support driver
drivers/mmc/host/sdhci-of-esdhc.c Linux eSDHC driver
Device Tree Binding
Property Type Status Description
compatible String Required Should be 'fsl,esdhc'
reg integer Required Register map
example:
esdhc: esdhc@1560000 {
compatible = "fsl,ls1046a-esdhc", "fsl,esdhc";
reg = <0x0 0x1560000 0x0 0x10000>;
interrupts = <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clockgen 2 1>;
voltage-ranges = <1800 1800 3300 3300>;
sdhci,auto-cmd12;
big-endian;
bus-width = <4>;
};
Verification in U-Boot
The U-Boot log
=> mmcinfo
Device: FSL_SDHC
Manufacturer ID: 74
OEM: 4a45
Name: SDC
Tran Speed: 50000000
Rd Block Len: 512
SD version 3.0
High Capacity: Yes
Capacity: 7.5 GiB
Bus Width: 4-bit
Erase Group Size: 512 Bytes
=> mw.l 81000000 11111111 100
=> mw.l 82000000 22222222 100
=> cmp.l 81000000 82000000 100
word at 0x0000000081000000 (0x11111111) != word at 0x0000000082000000 (0x22222222)
Total of 0 word(s) were the same
=> mmc write 81000000 0 2
MMC write: dev # 0, block # 0, count 2 ... 2 blocks written: OK
=> mmc read 82000000 0 2
MMC read: dev # 0, block # 0, count 2 ... 2 blocks read: OK
Device Drivers
Layerscape LS1028A BSP User Guide, Rev. 0.3, 04/2019
NXP Semiconductors
45