net: sparx5: add feature support

Lan969x supports a number of different features, depending on the
target. Add new field sparx5->features and initialize the features based
on the target. Also add the function sparx5_has_feature() and use it
throughout. For now, we only need to handle features: PSFP and PTP -
more will come in the future.

[1] https://www.microchip.com/en-us/product/lan9698

Reviewed-by: Steen Hegelund <Steen.Hegelund@microchip.com>
Signed-off-by: Daniel Machon <daniel.machon@microchip.com>
Link: https://patch.msgid.link/20241024-sparx5-lan969x-switch-driver-2-v2-15-a0b5fae88a0f@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/microchip/sparx5/sparx5_main.c

@@ -229,6 +229,40 @@ bool is_sparx5(struct sparx5 *sparx5)
 	}
 }
 
+static void sparx5_init_features(struct sparx5 *sparx5)
+{
+	switch (sparx5->target_ct) {
+	case SPX5_TARGET_CT_7546:
+	case SPX5_TARGET_CT_7549:
+	case SPX5_TARGET_CT_7552:
+	case SPX5_TARGET_CT_7556:
+	case SPX5_TARGET_CT_7558:
+	case SPX5_TARGET_CT_7546TSN:
+	case SPX5_TARGET_CT_7549TSN:
+	case SPX5_TARGET_CT_7552TSN:
+	case SPX5_TARGET_CT_7556TSN:
+	case SPX5_TARGET_CT_7558TSN:
+	case SPX5_TARGET_CT_LAN9691VAO:
+	case SPX5_TARGET_CT_LAN9694TSN:
+	case SPX5_TARGET_CT_LAN9694RED:
+	case SPX5_TARGET_CT_LAN9692VAO:
+	case SPX5_TARGET_CT_LAN9696TSN:
+	case SPX5_TARGET_CT_LAN9696RED:
+	case SPX5_TARGET_CT_LAN9693VAO:
+	case SPX5_TARGET_CT_LAN9698TSN:
+	case SPX5_TARGET_CT_LAN9698RED:
+		sparx5->features = (SPX5_FEATURE_PSFP | SPX5_FEATURE_PTP);
+		break;
+	default:
+		break;
+	}
+}
+
+bool sparx5_has_feature(struct sparx5 *sparx5, enum sparx5_feature feature)
+{
+	return sparx5->features & feature;
+}
+
 static int sparx5_create_targets(struct sparx5 *sparx5)
 {
 	const struct sparx5_main_io_resource *iomap = sparx5->data->iomap;
@@ -771,7 +805,8 @@ static int sparx5_start(struct sparx5 *sparx5)
 		sparx5->xtr_irq = -ENXIO;
 	}
 
-	if (sparx5->ptp_irq >= 0) {
+	if (sparx5->ptp_irq >= 0 &&
+	    sparx5_has_feature(sparx5, SPX5_FEATURE_PTP)) {
 		err = devm_request_threaded_irq(sparx5->dev, sparx5->ptp_irq,
 						NULL, ops->ptp_irq_handler,
 						IRQF_ONESHOT, "sparx5-ptp",
@@ -915,6 +950,9 @@ static int mchp_sparx5_probe(struct platform_device *pdev)
 	sparx5->target_ct = (enum spx5_target_chiptype)
 		GCB_CHIP_ID_PART_ID_GET(sparx5->chip_id);
 
+	/* Initialize the features based on the target */
+	sparx5_init_features(sparx5);
+
 	/* Initialize Switchcore and internal RAMs */
 	err = sparx5_init_switchcore(sparx5);
 	if (err) {

drivers/net/ethernet/microchip/sparx5/sparx5_main.h

@@ -75,6 +75,11 @@ enum sparx5_cal_bw {
 	SPX5_CAL_SPEED_12G5 = 7
 };
 
+enum sparx5_feature {
+	SPX5_FEATURE_PSFP = BIT(0),
+	SPX5_FEATURE_PTP  = BIT(1),
+};
+
 #define SPX5_PORTS             65
 #define SPX5_PORTS_ALL         70 /* Total number of ports */
 
@@ -337,6 +342,7 @@ struct sparx5 {
 	struct device *dev;
 	u32 chip_id;
 	enum spx5_target_chiptype target_ct;
+	u32 features;
 	void __iomem *regs[NUM_TARGETS];
 	int port_count;
 	struct mutex lock; /* MAC reg lock */
@@ -404,6 +410,7 @@ struct sparx5 {
 
 /* sparx5_main.c */
 bool is_sparx5(struct sparx5 *sparx5);
+bool sparx5_has_feature(struct sparx5 *sparx5, enum sparx5_feature feature);
 
 /* sparx5_switchdev.c */
 int sparx5_register_notifier_blocks(struct sparx5 *sparx5);

drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c

@@ -1284,6 +1284,11 @@ static int sparx5_tc_flower_replace(struct net_device *ndev,
 
 	/* Setup PSFP */
 	if (tc_sg_idx >= 0 || tc_pol_idx >= 0) {
+		if (!sparx5_has_feature(sparx5, SPX5_FEATURE_PSFP)) {
+			err = -EOPNOTSUPP;
+			goto out;
+		}
+
 		err = sparx5_tc_flower_psfp_setup(sparx5, vrule, tc_sg_idx,
 						  tc_pol_idx, &sg, &fm, &sf);
 		if (err)