Messages in this thread Patch in this message | | | From | <> | Subject | [PATCH 1/2] i2c: designware: device tree bindings for i2c speed mode | Date | Tue, 19 Aug 2014 13:34:35 -0500 |
| |
From: Alan Tull <atull@opensource.altera.com>
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@opensource.altera.com> --- .../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
| |