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This patch implements the device tree binding changes required for the PPS ECHO functionality for pps-gpio, that sysfs claims is available already. It adds two DT properties for configuring the PPS ECHO functionality. This patch is provided separated from the rest of the patch per Documentation/devicetree/bindings/submitting-patches.txt. This patch was originally written by Lukas Senger as part of a masters thesis project and modified for inclusion into the linux kernel by Tom Burkart. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Tom Burkart <[email protected]> Signed-off-by: Lukas Senger <[email protected]> Acked-by: Rodolfo Giometti <[email protected]> Reviewed-by: Rob Herring <[email protected]> Cc: Philipp Zabel <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>