ravb: Split delay handling in parsing and applying

Currently, full delay handling is done in both the probe and resume
paths.  Split it in two parts, so the resume path doesn't have to redo
the parsing part over and over again.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/renesas/ravb.h

@@ -1036,7 +1036,9 @@ struct ravb_private {
 	unsigned no_avb_link:1;
 	unsigned avb_link_active_low:1;
 	unsigned wol_enabled:1;
-	int num_tx_desc;	/* TX descriptors per packet */
+	unsigned rxcidm:1;		/* RX Clock Internal Delay Mode */
+	unsigned txcidm:1;		/* TX Clock Internal Delay Mode */
+	int num_tx_desc;		/* TX descriptors per packet */
 };
 
 static inline u32 ravb_read(struct net_device *ndev, enum ravb_reg reg)

drivers/net/ethernet/renesas/ravb_main.c

@@ -1999,23 +1999,32 @@ static const struct soc_device_attribute ravb_delay_mode_quirk_match[] = {
 };
 
 /* Set tx and rx clock internal delay modes */
-static void ravb_set_delay_mode(struct net_device *ndev)
+static void ravb_parse_delay_mode(struct net_device *ndev)
 {
 	struct ravb_private *priv = netdev_priv(ndev);
-	int set = 0;
 
 	if (priv->phy_interface == PHY_INTERFACE_MODE_RGMII_ID ||
 	    priv->phy_interface == PHY_INTERFACE_MODE_RGMII_RXID)
-		set |= APSR_DM_RDM;
+		priv->rxcidm = 1;
 
 	if (priv->phy_interface == PHY_INTERFACE_MODE_RGMII_ID ||
 	    priv->phy_interface == PHY_INTERFACE_MODE_RGMII_TXID) {
 		if (!WARN(soc_device_match(ravb_delay_mode_quirk_match),
 			  "phy-mode %s requires TX clock internal delay mode which is not supported by this hardware revision. Please update device tree",
 			  phy_modes(priv->phy_interface)))
-			set |= APSR_DM_TDM;
+			priv->txcidm = 1;
 	}
+}
 
+static void ravb_set_delay_mode(struct net_device *ndev)
+{
+	struct ravb_private *priv = netdev_priv(ndev);
+	u32 set = 0;
+
+	if (priv->rxcidm)
+		set |= APSR_DM_RDM;
+	if (priv->txcidm)
+		set |= APSR_DM_TDM;
 	ravb_modify(ndev, APSR, APSR_DM, set);
 }
 
@@ -2148,8 +2157,10 @@ static int ravb_probe(struct platform_device *pdev)
 	/* Request GTI loading */
 	ravb_modify(ndev, GCCR, GCCR_LTI, GCCR_LTI);
 
-	if (priv->chip_id != RCAR_GEN2)
+	if (priv->chip_id != RCAR_GEN2) {
+		ravb_parse_delay_mode(ndev);
 		ravb_set_delay_mode(ndev);
+	}
 
 	/* Allocate descriptor base address table */
 	priv->desc_bat_size = sizeof(struct ravb_desc) * DBAT_ENTRY_NUM;