driver: eth_mcux: gptp: limit rate_adjust range

ainguraXmarquiegui · dleach02 · commit 62db8ca0e60c · 2022-02-11T10:03:05.000-06:00
Limit gptp range_adjust range for improved performance.

Signed-off-by: Hake Huang &lt;hake.huang@oss.nxp.com&gt;
Signed-off-by: Xabier Marquiegui &lt;xmarquiegui@ainguraiiot.com&gt;
diff --git a/drivers/ethernet/eth_mcux.c b/drivers/ethernet/eth_mcux.c
@@ -1656,7 +1656,8 @@ static int ptp_clock_mcux_rate_adjust(const struct device *dev, float ratio)
 	float val;
 
 	/* No change needed. */
-	if (ratio == 1.0f) {
+	if ((ratio > 1.0 && ratio - 1.0 < 0.00000001) ||
+	   (ratio < 1.0 && 1.0 - ratio < 0.00000001)) {
 		return 0;
 	}
 

Original file line number	Diff line number	Diff line change
`@@ -1656,7 +1656,8 @@ static int ptp_clock_mcux_rate_adjust(const struct device *dev, float ratio)`
`1656`	`1656`	`float val;`
`1657`	`1657`
`1658`	`1658`	`/* No change needed. */`
`1659`		`- if (ratio == 1.0f) {`
	`1659`	`+ if ((ratio > 1.0 && ratio - 1.0 < 0.00000001) \|\|`
	`1660`	`+ (ratio < 1.0 && 1.0 - ratio < 0.00000001)) {`
`1660`	`1661`	`return 0;`
`1661`	`1662`	`}`
`1662`	`1663`