The documentation was forgotten when the feature was added.

Fixes: 4717be73c284 ("i2c: core: Parse SDA hold time from firmware")
Signed-off-by: Wolfram Sang <wsa+rene...@sang-engineering.com>
---

To everyone on CC: I want to confirm here that you use the value really for
t(hd:sta) and not t(hd:dat). I'd be a little confused otherwise...

 Documentation/devicetree/bindings/i2c/i2c.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/i2c/i2c.txt 
b/Documentation/devicetree/bindings/i2c/i2c.txt
index 44efafdfd7f5..b7bc4c4cc2e6 100644
--- a/Documentation/devicetree/bindings/i2c/i2c.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c.txt
@@ -55,6 +55,10 @@ wants to support one of the below features, it should adapt 
the bindings below.
        Number of nanoseconds the SDA signal takes to fall; t(f) in the I2C
        specification.
 
+- i2c-sda-hold-time-ns
+       Number of nanoseconds the SDA signal needs to be held; t(hd:sta) in
+       the I2C specification.
+
 - interrupts
        interrupts used by the device.
 
-- 
2.11.0

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