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p54: improve TSF timestamp precision 

The LMAC API states that the TSF clock value of
every rx'ed frame is a "usec accurate timestamp
of the hardware clock at the end of frame
(before OFDM SIFS EOF padding)".

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Christian Lamparter 2012-11-24 14:23:25 +01:00 committed by John W. Linville
parent 1d815ef4b8
commit 725d255e70
1 changed files with 5 additions and 1 deletions
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6
drivers/net/wireless/p54/txrx.c
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@ -369,7 +369,11 @@ static int p54_rx_data(struct p54_common *priv, struct sk_buff *skb)
rx_status->mactime = ((u64)priv->tsf_high32) << 32 | tsf32;
priv->tsf_low32 = tsf32;
rx_status->flag |= RX_FLAG_MACTIME_START;
/* LMAC API Page 10/29 - s_lm_data_in - clock
* "usec accurate timestamp of hardware clock
* at end of frame (before OFDM SIFS EOF padding"
*/
rx_status->flag |= RX_FLAG_MACTIME_END;
if (hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
header_len += hdr->align[0];