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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: DMA controller phandle and DMA request value ordered pair
One tx and one rx pair is required.
dma-names: DMA request names. These strings correspond 1:1 with
the ordered pairs in dmas. The RX request must be "rx" and the
TX request must be "tx".
caps2-mmc-hs200-1_8v: the controller supports HS200 mode
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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