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authorGrant Likely <grant.likely@secretlab.ca>2011-08-23 12:15:33 -0600
committerChris Ball <cjb@laptop.org>2011-10-26 15:43:35 -0400
commit275173b225ae663e54d8dc5c93d79265aad19f89 (patch)
treece6cd20e8d888c74d0eaa3975acee705f239462a /Documentation
parent08da834a24312157f512224691ad1fddd11c1073 (diff)
downloadlinux-275173b225ae663e54d8dc5c93d79265aad19f89.tar.bz2
mmc: sdhci-tegra: Add Device Tree probing support
Add hooks to read gpio configuration out of the device tree node. [grant.likely: Rewrite of original patch from John Bonesio] Signed-off-by: Grant Likely <grant.likely@secretlab.ca> [swarren: Fixed tegra_sdhci_get_ro() to retrieve pdata correctly] [swarren: Reworked to avoid #ifdef CONFIG_OF] [swarren: Reworked binding based on fsl-imx-esdhc.txt] [swarren: Documented binding] Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt25
1 files changed, 25 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt b/Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt
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+++ b/Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt
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+* NVIDIA Tegra Secure Digital Host Controller
+
+This controller on Tegra family SoCs provides an interface for MMC, SD,
+and SDIO types of memory cards.
+
+Required properties:
+- compatible : Should be "nvidia,<chip>-sdhci"
+- reg : Should contain eSDHC registers location and length
+- interrupts : Should contain eSDHC interrupt
+
+Optional properties:
+- cd-gpios : Specify GPIOs for card detection
+- wp-gpios : Specify GPIOs for write protection
+- 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 */
+};