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Diffstat (limited to 'dts/Bindings/mmc/ti-omap-hsmmc.txt')
| -rw-r--r-- | dts/Bindings/mmc/ti-omap-hsmmc.txt | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/dts/Bindings/mmc/ti-omap-hsmmc.txt b/dts/Bindings/mmc/ti-omap-hsmmc.txt new file mode 100644 index 0000000000..ce8056116f --- /dev/null +++ b/dts/Bindings/mmc/ti-omap-hsmmc.txt @@ -0,0 +1,58 @@ +* 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"; + }; |