| * Freescale Enhanced Secure Digital Host Controller (eSDHC) for i.MX |
| |
| The Enhanced Secure Digital Host Controller on Freescale i.MX family |
| provides an interface for MMC, SD, and SDIO types of memory cards. |
| |
| This file documents differences between the core properties described |
| by mmc.txt and the properties used by the sdhci-esdhc-imx driver. |
| |
| Required properties: |
| - compatible : Should be "fsl,<chip>-esdhc" |
| |
| Optional properties: |
| - fsl,cd-controller : Indicate to use controller internal card detection |
| - fsl,wp-controller : Indicate to use controller internal write protection |
| - fsl,delay-line : Specify the number of delay cells for override mode. |
| This is used to set the clock delay for DLL(Delay Line) on override mode |
| to select a proper data sampling window in case the clock quality is not good |
| due to signal path is too long on the board. Please refer to eSDHC/uSDHC |
| chapter, DLL (Delay Line) section in RM for details. |
| |
| Examples: |
| |
| esdhc@70004000 { |
| compatible = "fsl,imx51-esdhc"; |
| reg = <0x70004000 0x4000>; |
| interrupts = <1>; |
| fsl,cd-controller; |
| fsl,wp-controller; |
| }; |
| |
| esdhc@70008000 { |
| compatible = "fsl,imx51-esdhc"; |
| reg = <0x70008000 0x4000>; |
| interrupts = <2>; |
| cd-gpios = <&gpio1 6 0>; /* GPIO1_6 */ |
| wp-gpios = <&gpio1 5 0>; /* GPIO1_5 */ |
| }; |
