Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / mmc / fsl-esdhc.txt

diff --git a/kernel/Documentation/devicetree/bindings/mmc/fsl-esdhc.txt b/kernel/Documentation/devicetree/bindings/mmc/fsl-esdhc.txt
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+* Freescale Enhanced Secure Digital Host Controller (eSDHC)
+
+The Enhanced Secure Digital Host Controller 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 sdhci-esdhc driver.
+
+Required properties:
+  - interrupt-parent : interrupt source phandle.
+  - clock-frequency : specifies eSDHC base clock frequency.
+
+Optional properties:
+  - sdhci,wp-inverted : specifies that eSDHC controller reports
+    inverted write-protect state; New devices should use the generic
+    "wp-inverted" property.
+  - sdhci,1-bit-only : specifies that a controller can only handle
+    1-bit data transfers. New devices should use the generic
+    "bus-width = <1>" property.
+  - sdhci,auto-cmd12: specifies that a controller can only handle auto
+    CMD12.
+  - voltage-ranges : two cells are required, first cell specifies minimum
+    slot voltage (mV), second cell specifies maximum slot voltage (mV).
+    Several ranges could be specified.
+
+Example:
+
+sdhci@2e000 {
+       compatible = "fsl,mpc8378-esdhc", "fsl,esdhc";
+       reg = <0x2e000 0x1000>;
+       interrupts = <42 0x8>;
+       interrupt-parent = <&ipic>;
+       /* Filled in by U-Boot */
+       clock-frequency = <0>;
+       voltage-ranges = <3300 3300>;
+};