0001 * Atmel SDHCI controller
0002
0003 This file documents the differences between the core properties in
0004 Documentation/devicetree/bindings/mmc/mmc.txt and the properties used by the
0005 sdhci-of-at91 driver.
0006
0007 Required properties:
0008 - compatible: Must be "atmel,sama5d2-sdhci" or "microchip,sam9x60-sdhci".
0009 - clocks: Phandlers to the clocks.
0010 - clock-names: Must be "hclock", "multclk", "baseclk" for
0011 "atmel,sama5d2-sdhci".
0012 Must be "hclock", "multclk" for "microchip,sam9x60-sdhci".
0013
0014 Optional properties:
0015 - assigned-clocks: The same with "multclk".
0016 - assigned-clock-rates The rate of "multclk" in order to not rely on the
0017 gck configuration set by previous components.
0018 - microchip,sdcal-inverted: when present, polarity on the SDCAL SoC pin is
0019 inverted. The default polarity for this signal is described in the datasheet.
0020 For instance on SAMA5D2, the pin is usually tied to the GND with a resistor
0021 and a capacitor (see "SDMMC I/O Calibration" chapter).
0022
0023 Example:
0024
0025 mmc0: sdio-host@a0000000 {
0026 compatible = "atmel,sama5d2-sdhci";
0027 reg = <0xa0000000 0x300>;
0028 interrupts = <31 IRQ_TYPE_LEVEL_HIGH 0>;
0029 clocks = <&sdmmc0_hclk>, <&sdmmc0_gclk>, <&main>;
0030 clock-names = "hclock", "multclk", "baseclk";
0031 assigned-clocks = <&sdmmc0_gclk>;
0032 assigned-clock-rates = <480000000>;
0033 };
