From: Alan Tull <atull@xxxxxxxxxxxxxxxxxxxxx>
Add "speed-mode" Device Tree property to select between
standard and fast i2c mode. Previously, driver was hardwired
as fast mode. Default to fast mode if property is not
present.
Signed-off-by: Alan Tull <atull@xxxxxxxxxxxxxxxxxxxxx>
---
.../devicetree/bindings/i2c/i2c-designware.txt | 3 +++
1 file changed, 3 insertions(+)
diff --git a/Documentation/devicetree/bindings/i2c/i2c-designware.txt b/Documentation/devicetree/bindings/i2c/i2c-designware.txt
index 5199b0c..0e4cd21 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-designware.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-designware.txt
@@ -9,6 +9,8 @@ Required properties :
Recommended properties :
- clock-frequency : desired I2C bus clock frequency in Hz.
+ - speed-mode : 0 = standard (0 - 100Kb/s)
+ : 1 = fast (<= 400Kb/s) <== default
Optional properties :
- i2c-sda-hold-time-ns : should contain the SDA hold time in nanoseconds.
@@ -29,6 +31,7 @@ Example :
reg = <0xf0000 0x1000>;
interrupts = <11>;
clock-frequency = <400000>;
+ speed-mode = <0>;
};
i2c@1120000 {
--
1.7.9.5
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