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net: macb: Add separate definition for PPM fraction 

The scaled ppm parameter passed to _adjfine() contains a 16 bit
fraction. This just happens to be the same as SUBNSINCR_SIZE now.
Hence define this separately.

Signed-off-by: Harini Katakam <harini.katakam@xilinx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Harini Katakam 2019-06-27 11:50:59 +05:30 committed by David S. Miller
parent 79293f4967
commit a8ee4dc1b5
2 changed files with 4 additions and 1 deletions
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3
drivers/net/ethernet/cadence/macb.h
View File

@ -834,6 +834,9 @@ struct gem_tx_ts {
/* limit RX checksum offload to TCP and UDP packets */
#define GEM_RX_CSUM_CHECKED_MASK 2
/* Scaled PPM fraction */
#define PPM_FRACTION 16
/* struct macb_tx_skb - data about an skb which is being transmitted
* @skb: skb currently being transmitted, only set for the last buffer
* of the frame

2
drivers/net/ethernet/cadence/macb_ptp.c
View File

@ -135,7 +135,7 @@ static int gem_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
* (temp / USEC_PER_SEC) + 0.5
*/
adj += (USEC_PER_SEC >> 1);
adj >>= GEM_SUBNSINCR_SIZE; /* remove fractions */
adj >>= PPM_FRACTION; /* remove fractions */
adj = div_u64(adj, USEC_PER_SEC);
adj = neg_adj ? (word - adj) : (word + adj);