net: stmmac: replace the ext_snapshot_en field with a flag

Drop the boolean field of the plat_stmmacenet_data structure in favor of a
simple bitfield flag.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Andrew Halaney <ahalaney@redhat.com>
Link: https://lore.kernel.org/r/20230710090001.303225-10-brgl@bgdev.pl
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c

@@ -326,7 +326,7 @@ static int intel_crosststamp(ktime_t *device,
 	/* Both internal crosstimestamping and external triggered event
 	 * timestamping cannot be run concurrently.
 	 */
-	if (priv->plat->ext_snapshot_en)
+	if (priv->plat->flags & STMMAC_FLAG_EXT_SNAPSHOT_EN)
 		return -EBUSY;
 
 	priv->plat->int_snapshot_en = 1;

drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c

@@ -195,7 +195,7 @@ static void timestamp_interrupt(struct stmmac_priv *priv)
 	 */
 	ts_status = readl(priv->ioaddr + GMAC_TIMESTAMP_STATUS);
 
-	if (!priv->plat->ext_snapshot_en)
+	if (priv->plat->flags & STMMAC_FLAG_EXT_SNAPSHOT_EN)
 		return;
 
 	num_snapshot = (ts_status & GMAC_TIMESTAMP_ATSNS_MASK) >>

drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c

@@ -192,7 +192,10 @@ static int stmmac_enable(struct ptp_clock_info *ptp,
 		write_unlock_irqrestore(&priv->ptp_lock, flags);
 		break;
 	case PTP_CLK_REQ_EXTTS:
-		priv->plat->ext_snapshot_en = on;
+		if (on)
+			priv->plat->flags |= STMMAC_FLAG_EXT_SNAPSHOT_EN;
+		else
+			priv->plat->flags &= ~STMMAC_FLAG_EXT_SNAPSHOT_EN;
 		mutex_lock(&priv->aux_ts_lock);
 		acr_value = readl(ptpaddr + PTP_ACR);
 		acr_value &= ~PTP_ACR_MASK;

include/linux/stmmac.h

@@ -212,6 +212,7 @@ struct dwmac4_addrs {
 #define STMMAC_FLAG_SERDES_UP_AFTER_PHY_LINKUP	BIT(5)
 #define STMMAC_FLAG_VLAN_FAIL_Q_EN		BIT(6)
 #define STMMAC_FLAG_MULTI_MSI_EN		BIT(7)
+#define STMMAC_FLAG_EXT_SNAPSHOT_EN		BIT(8)
 
 struct plat_stmmacenet_data {
 	int bus_id;
@@ -286,7 +287,6 @@ struct plat_stmmacenet_data {
 	int int_snapshot_num;
 	int ext_snapshot_num;
 	bool int_snapshot_en;
-	bool ext_snapshot_en;
 	int msi_mac_vec;
 	int msi_wol_vec;
 	int msi_lpi_vec;