[PATCH net RESEND 2/2] net: macb: Use all-frame timestamping for PTPv1 RX filters

gem_set_hwtst() accepts HWTSTAMP_FILTER_PTP_V1_L4_SYNC and
HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ without changing rx_bd_control from
TSTAMP_DISABLED. A successful request thus disables receive timestamping
while reporting the requested nonempty filter to userspace.

Handle these two filters through the existing all-frame fallback used
for HWTSTAMP_FILTER_PTP_V1_L4_EVENT. This enables receive timestamping
for a superset of the requested packets and returns HWTSTAMP_FILTER_ALL
to describe the configuration actually selected.

Fixes: ab91f0a9b5f4 ("net: macb: Add hardware PTP support")
Assisted-by: GPT-6 Astra
Signed-off-by: kimwooseok <redacted>
---
Resending as plain text because the previous webmail submission included
HTML and quoted and rewrapped the patch. No code changes; the Assisted-by
trailer now names the tool.

 drivers/net/ethernet/cadence/macb_ptp.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/cadence/macb_ptp.c b/drivers/net/ethernet/cadence/macb_ptp.c
index 51659bb..2ffc46b 100644
--- a/drivers/net/ethernet/cadence/macb_ptp.c
+++ b/drivers/net/ethernet/cadence/macb_ptp.c

@@ -430,10 +430,6 @@ int gem_set_hwtst(struct net_device *netdev,
 	switch (tstamp_config->rx_filter) {
 	case HWTSTAMP_FILTER_NONE:
 		break;
-	case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
-		break;
-	case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
-		break;
 	case HWTSTAMP_FILTER_PTP_V2_EVENT:
 	case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
 	case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:

@@ -448,6 +444,8 @@ int gem_set_hwtst(struct net_device *netdev,
 		regval = macb_readl(bp, NCR);
 		macb_writel(bp, NCR, (regval | MACB_BIT(SRTSM)));
 		break;
+	case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
+	case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
 	case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
 	case HWTSTAMP_FILTER_ALL:
 		rx_bd_control = TSTAMP_ALL_FRAMES;

-- 
2.53.0.windows.3