From: Eugen Hristev <eugen.hristev@xxxxxxxxxxxxx> Some i2c controllers have a built-in digital or analog filter. This is specifically required depending on the hardware PCB/board. Some controllers also allow specifying the maximum width of the spikes that can be filtered. The width length can be specified in nanoseconds. Signed-off-by: Eugen Hristev <eugen.hristev@xxxxxxxxxxxxx> --- Documentation/devicetree/bindings/i2c/i2c.txt | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/Documentation/devicetree/bindings/i2c/i2c.txt b/Documentation/devicetree/bindings/i2c/i2c.txt index 44efafd..a2d31aa 100644 --- a/Documentation/devicetree/bindings/i2c/i2c.txt +++ b/Documentation/devicetree/bindings/i2c/i2c.txt @@ -55,6 +55,17 @@ 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-ana-filter + Enable analog filter for i2c lines. + +- i2c-dig-filter + Enable digital filter for i2c lines. + +- i2c-filter-width-ns + Width of spikes which can be filtered by either digital or analog + filters (i2c-ana-filtr or i2c-dig-filtr). This width is specified + in nanoseconds. + - interrupts interrupts used by the device. -- 2.7.4
