59 lines
1.9 KiB
Plaintext
59 lines
1.9 KiB
Plaintext
* 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,omap3-pre-es3-hsmmc" for OMAP3 controllers pre ES3.0
|
|
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";
|
|
};
|