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authorMark Brown <broonie@kernel.org>2015-10-12 18:09:27 +0100
committerMark Brown <broonie@kernel.org>2015-10-12 18:09:27 +0100
commit79828b4fa835f73cdaf4bffa48696abdcbea9d02 (patch)
tree5e0fa7156acb75ba603022bc807df8f2fedb97a8 /include/uapi/linux/ethtool.h
parent721b51fcf91898299d96f4b72cb9434cda29dce6 (diff)
parent8c1a9d6323abf0fb1e5dad96cf3f1c783505ea5a (diff)
Merge remote-tracking branch 'asoc/fix/rt5645' into asoc-fix-rt5645
Diffstat (limited to 'include/uapi/linux/ethtool.h')
-rw-r--r--include/uapi/linux/ethtool.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index cd67aec187d9..cd1629170103 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -1093,6 +1093,11 @@ struct ethtool_sfeatures {
* the 'hwtstamp_tx_types' and 'hwtstamp_rx_filters' enumeration values,
* respectively. For example, if the device supports HWTSTAMP_TX_ON,
* then (1 << HWTSTAMP_TX_ON) in 'tx_types' will be set.
+ *
+ * Drivers should only report the filters they actually support without
+ * upscaling in the SIOCSHWTSTAMP ioctl. If the SIOCSHWSTAMP request for
+ * HWTSTAMP_FILTER_V1_SYNC is supported by HWTSTAMP_FILTER_V1_EVENT, then the
+ * driver should only report HWTSTAMP_FILTER_V1_EVENT in this op.
*/
struct ethtool_ts_info {
__u32 cmd;