[PATCH v2 02/10] dt-bindings: mmc: tegra: Add nvidia,only-1-8-v property

[Aapo Vienamo]

Add a property to mark controllers which operate at a 1.8 V fixed I/O
voltage.

This feature of the hardware needs to be signaled this way because it
cannot be probed at runtime or reliably derived from other properties.

Signed-off-by: Aapo Vienamo <avienamo@xxxxxxxxxx>
---
 Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt b/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt
index 90c214d..95010cf 100644
--- a/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt
+++ b/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt
@@ -45,6 +45,8 @@ Optional properties for Tegra210 and Tegra186:
   for controllers supporting multiple voltage levels. The order of names
   should correspond to the pin configuration states in pinctrl-0 and
   pinctrl-1.
+- nvidia,only-1-8-v : The presence of this property indicates that the
+  controller operates at a 1.8 V fixed I/O voltage.
 
 Example:
 sdhci@700b0000 {
-- 
2.7.4