ptp: Added a clock driver for the IXP46x.

This patch adds a driver for the hardware time stamping unit found on the
IXP465. The basic clock operations and an external trigger are implemented.

Signed-off-by: Richard Cochran <richard.cochran@omicron.at>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: John Stultz <john.stultz@linaro.org>
Acked-by: Krzysztof Halasa <khc@pm.waw.pl>
Signed-off-by: John Stultz <john.stultz@linaro.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/ptp/Kconfig b/drivers/ptp/Kconfig
index 12eb8447c26b..fcfafd091fdd 100644
--- a/drivers/ptp/Kconfig
+++ b/drivers/ptp/Kconfig
@@ -40,4 +40,17 @@ config PTP_1588_CLOCK_GIANFAR
           To compile this driver as a module, choose M here: the module
           will be called gianfar_ptp.
 
+config PTP_1588_CLOCK_IXP46X
+        tristate "Intel IXP46x as PTP clock"
+        depends on PTP_1588_CLOCK
+        depends on IXP4XX_ETH
+        help
+          This driver adds support for using the IXP46X as a PTP
+          clock. This clock is only useful if your PTP programs are
+          getting hardware time stamps on the PTP Ethernet packets
+          using the SO_TIMESTAMPING API.
+
+          To compile this driver as a module, choose M here: the module
+          will be called ptp_ixp46x.
+
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