* Atmel SDHCI controller

This file documents the differences between the core properties in
Documentation/devicetree/bindings/mmc/mmc.txt and the properties used by the
sdhci-of-at91 driver.

Required properties:
- compatible:		Must be "atmel,sama5d2-sdhci".
- clocks:		Phandlers to the clocks.
- clock-names:		Must be "hclock", "multclk", "baseclk";

Optional properties:
- microchip,sdcal-inverted: when present, polarity on the SDCAL SoC pin is
  inverted. The default polarity for this signal is described in the datasheet.
  For instance on SAMA5D2, the pin is usually tied to the GND with a resistor
  and a capacitor (see "SDMMC I/O Calibration" chapter).

Example:

sdmmc0: sdio-host@a0000000 {
	compatible = "atmel,sama5d2-sdhci";
	reg = <0xa0000000 0x300>;
	interrupts = <31 IRQ_TYPE_LEVEL_HIGH 0>;
	clocks = <&sdmmc0_hclk>, <&sdmmc0_gclk>, <&main>;
	clock-names = "hclock", "multclk", "baseclk";
};