Re: [PATCH v3 2/9] dt-bindings: i2c: add bindings for i2c analog and digital filter
From: Wolfram Sang <hidden>
Date: 2019-08-31 11:39:23
Also in:
linux-devicetree, linux-i2c, lkml
On Tue, Jul 09, 2019 at 01:19:33PM +0000, Eugen.Hristev@microchip.com wrote:
quoted hunk ↗ jump to hunk
From: Eugen Hristev <redacted> 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 <redacted> --- 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.
Would you be OK with writing out 'analog' and 'digital' in full form? The abrreviation doesn't save us much, I'd think, and I didn't find similar wording in existing bindings.
+ +- 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