0001 * Freescale Enhanced Secure Digital Host Controller (eSDHC)
0002
0003 The Enhanced Secure Digital Host Controller provides an interface
0004 for MMC, SD, and SDIO types of memory cards.
0005
0006 This file documents differences between the core properties described
0007 by mmc.txt and the properties used by the sdhci-esdhc driver.
0008
0009 Required properties:
0010 - compatible : should be "fsl,esdhc", or "fsl,<chip>-esdhc".
0011 Possible compatibles for PowerPC:
0012 "fsl,mpc8536-esdhc"
0013 "fsl,mpc8378-esdhc"
0014 "fsl,p2020-esdhc"
0015 "fsl,p4080-esdhc"
0016 "fsl,t1040-esdhc"
0017 "fsl,t4240-esdhc"
0018 Possible compatibles for ARM:
0019 "fsl,ls1012a-esdhc"
0020 "fsl,ls1028a-esdhc"
0021 "fsl,ls1088a-esdhc"
0022 "fsl,ls1043a-esdhc"
0023 "fsl,ls1046a-esdhc"
0024 "fsl,ls2080a-esdhc"
0025 - clock-frequency : specifies eSDHC base clock frequency.
0026
0027 Optional properties:
0028 - sdhci,wp-inverted : specifies that eSDHC controller reports
0029 inverted write-protect state; New devices should use the generic
0030 "wp-inverted" property.
0031 - sdhci,1-bit-only : specifies that a controller can only handle
0032 1-bit data transfers. New devices should use the generic
0033 "bus-width = <1>" property.
0034 - sdhci,auto-cmd12: specifies that a controller can only handle auto
0035 CMD12.
0036 - voltage-ranges : two cells are required, first cell specifies minimum
0037 slot voltage (mV), second cell specifies maximum slot voltage (mV).
0038 Several ranges could be specified.
0039 - little-endian : If the host controller is little-endian mode, specify
0040 this property. The default endian mode is big-endian.
0041
0042 Example:
0043
0044 sdhci@2e000 {
0045 compatible = "fsl,mpc8378-esdhc", "fsl,esdhc";
0046 reg = <0x2e000 0x1000>;
0047 interrupts = <42 0x8>;
0048 interrupt-parent = <&ipic>;
0049 /* Filled in by U-Boot */
0050 clock-frequency = <0>;
0051 voltage-ranges = <3300 3300>;
0052 };
