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Date:	Mon,  3 Feb 2014 15:36:50 +0100
From:	Stefan Sørensen 
Cc:	Stefan Sørensen 
Subject: [PATCH] net:phy:dp83640: Do not hardcode timestamping event edge

Currently the external timestamping code it hardcoded to use
the rising edge even though the hardware has configurable event
edge detection. This patch change the code to use falling edge
detection if PTP_FALLING_EDGE is set in the user supplied flags.

Signed-off-by: Stefan Sørensen <>
 drivers/net/phy/dp83640.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/dp83640.c b/drivers/net/phy/dp83640.c
index baa1a75..80c5fc8 100644
--- a/drivers/net/phy/dp83640.c
+++ b/drivers/net/phy/dp83640.c
@@ -440,7 +440,10 @@ static int ptp_dp83640_enable(struct ptp_clock_info *ptp,
 		if (on) {
 			gpio_num = extts_gpio[index];
 			evnt |= (gpio_num & EVNT_GPIO_MASK) << EVNT_GPIO_SHIFT;
-			evnt |= EVNT_RISE;
+			if (rq->extts.flags & PTP_FALLING_EDGE)
+				evnt |= EVNT_FALL;
+			else
+				evnt |= EVNT_RISE;
 		ext_write(0, phydev, PAGE5, PTP_EVNT, evnt);
 		return 0;

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