--- /dev/null
-- reg : Should contain SD/MMC registers location and length
-- interrupts : Should contain SD/MMC interrupt
-- bus-width : Number of data lines, can be <1>, <4>, or <8>
+ * NVIDIA Tegra Secure Digital Host Controller
+
+ This controller on Tegra family SoCs 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-tegra driver.
++
+ Required properties:
+ - compatible : Should be "nvidia,<chip>-sdhci"
-- cd-gpios : Specify GPIOs for card detection
-- wp-gpios : Specify GPIOs for write protection
+
+ Optional properties:
+ - power-gpios : Specify GPIOs for power control
+
+ Example:
+
+ sdhci@c8000200 {
+ compatible = "nvidia,tegra20-sdhci";
+ reg = <0xc8000200 0x200>;
+ interrupts = <47>;
+ cd-gpios = <&gpio 69 0>; /* gpio PI5 */
+ wp-gpios = <&gpio 57 0>; /* gpio PH1 */
+ power-gpios = <&gpio 155 0>; /* gpio PT3 */
+ bus-width = <8>;
+ };