ravb: Add internal delay hw feature to struct ravb_hw_info

R-Car Gen3 supports TX and RX clock internal delay modes, whereas R-Car
Gen2 and RZ/G2L do not support it.
Add an internal_delay hw feature bit to struct ravb_hw_info to enable this
only for R-Car Gen3.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index 85eb3c6..65a13ad 100644 (file)
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h
@@ -997,6 +997,9 @@ struct ravb_hw_info {
        int stats_len;
        size_t max_rx_len;
        unsigned aligned_tx: 1;
+
+       /* hardware features */
+       unsigned internal_delay:1;      /* AVB-DMAC has internal delays */
 };
 
 struct ravb_private {

diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 6b209ad..2fe4b92 100644 (file)
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -1936,6 +1936,7 @@ static const struct ravb_hw_info ravb_gen3_hw_info = {
        .chip_id = RCAR_GEN3,
        .stats_len = ARRAY_SIZE(ravb_gstrings_stats),
        .max_rx_len = RX_BUF_SZ + RAVB_ALIGN - 1,
+       .internal_delay = 1,
 };
 
 static const struct ravb_hw_info ravb_gen2_hw_info = {
@@ -2175,7 +2176,7 @@ 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 (info->internal_delay) {
                ravb_parse_delay_mode(np, ndev);
                ravb_set_delay_mode(ndev);
        }
@@ -2348,6 +2349,7 @@ static int __maybe_unused ravb_resume(struct device *dev)
 {
        struct net_device *ndev = dev_get_drvdata(dev);
        struct ravb_private *priv = netdev_priv(ndev);
+       const struct ravb_hw_info *info = priv->info;
        int ret = 0;
 
        /* If WoL is enabled set reset mode to rearm the WoL logic */
@@ -2370,7 +2372,7 @@ static int __maybe_unused ravb_resume(struct device *dev)
        /* Request GTI loading */
        ravb_modify(ndev, GCCR, GCCR_LTI, GCCR_LTI);
 
-       if (priv->chip_id != RCAR_GEN2)
+       if (info->internal_delay)
                ravb_set_delay_mode(ndev);
 
        /* Restore descriptor base address table */