Document HS400 DQS trim value device tree property.
Signed-off-by: Aapo Vienamo <avienamo@xxxxxxxxxx>
---
Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt | 3 +++
1 file changed, 3 insertions(+)
diff --git a/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt b/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt
index 3c7960a..7d294f3 100644
--- a/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt
+++ b/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt
@@ -72,6 +72,7 @@ Optional properties for Tegra210 and Tegra186:
trimmer value for non-tunable modes.
- nvidia,default-trim : Specify the default outbound clock trimmer
value.
+- nvidia,dqs-trim : Specify DQS trim value for HS400 timing
Notes on the pad calibration pull up and pulldown offset values:
- The property values are drive codes which are programmed into the
@@ -88,6 +89,8 @@ Optional properties for Tegra210 and Tegra186:
- The values are programmed to the Vendor Clock Control Register.
Please refer to the reference manual of the SoC for correct
values.
+ - The DQS trim values are only used on controllers which support
+ HS400 timing.
Example:
sdhci@700b0000 {
--
2.7.4
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