diff options
| author | Grant Likely <grant.likely@secretlab.ca> | 2011-08-23 22:15:33 +0400 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2011-10-26 23:43:35 +0400 |
| commit | 275173b225ae663e54d8dc5c93d79265aad19f89 (patch) | |
| tree | ce6cd20e8d888c74d0eaa3975acee705f239462a /Documentation | |
| parent | 08da834a24312157f512224691ad1fddd11c1073 (diff) | |
| download | linux-275173b225ae663e54d8dc5c93d79265aad19f89.tar.xz | |
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.txt | 25 |
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 new file mode 100644 index 000000000000..c87f66782726 --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt @@ -0,0 +1,25 @@ +* 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 */ +}; |