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- * TI Highspeed MMC host controller for OMAP
- The Highspeed MMC Host Controller on TI OMAP 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 omap_hsmmc driver.
- Required properties:
- - compatible:
- Should be "ti,omap2-hsmmc", for OMAP2 controllers
- Should be "ti,omap3-hsmmc", for OMAP3 controllers
- Should be "ti,omap4-hsmmc", for OMAP4 controllers
- - ti,hwmods: Must be "mmc<n>", n is controller instance starting 1
- Optional properties:
- ti,dual-volt: boolean, supports dual voltage cards
- <supply-name>-supply: phandle to the regulator device tree node
- "supply-name" examples are "vmmc", "vmmc_aux" etc
- ti,non-removable: non-removable slot (like eMMC)
- ti,needs-special-reset: Requires a special softreset sequence
- ti,needs-special-hs-handling: HSMMC IP needs special setting for handling High Speed
- dmas: List of DMA specifiers with the controller specific format
- as described in the generic DMA client binding. A tx and rx
- specifier is required.
- dma-names: List of DMA request names. These strings correspond
- 1:1 with the DMA specifiers listed in dmas. The string naming is
- to be "rx" and "tx" for RX and TX DMA requests, respectively.
- Examples:
- [hwmod populated DMA resources]
- mmc1: mmc@0x4809c000 {
- compatible = "ti,omap4-hsmmc";
- reg = <0x4809c000 0x400>;
- ti,hwmods = "mmc1";
- ti,dual-volt;
- bus-width = <4>;
- vmmc-supply = <&vmmc>; /* phandle to regulator node */
- ti,non-removable;
- };
- [generic DMA request binding]
- mmc1: mmc@0x4809c000 {
- compatible = "ti,omap4-hsmmc";
- reg = <0x4809c000 0x400>;
- ti,hwmods = "mmc1";
- ti,dual-volt;
- bus-width = <4>;
- vmmc-supply = <&vmmc>; /* phandle to regulator node */
- ti,non-removable;
- dmas = <&edma 24
- &edma 25>;
- dma-names = "tx", "rx";
- };
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