linux-kernel - [PATCH net-next v2 11/21] net: ravb: Move DBAT configuration to the driver's ndo

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Message-Id: <20231214114600.2451162-12-claudiu.beznea.uj@bp.renesas.com>
Date:   Thu, 14 Dec 2023 13:45:50 +0200
From:   Claudiu <claudiu.beznea@...on.dev>
To:     s.shtylyov@....ru, davem@...emloft.net, edumazet@...gle.com,
        kuba@...nel.org, pabeni@...hat.com, richardcochran@...il.com,
        p.zabel@...gutronix.de, yoshihiro.shimoda.uh@...esas.com,
        wsa+renesas@...g-engineering.com, geert+renesas@...der.be
Cc:     netdev@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Subject: [PATCH net-next v2 11/21] net: ravb: Move DBAT configuration to the driver's ndo_open API

From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>

DBAT setup was done in the driver's probe API. As some IP variants switch
to reset mode (and thus registers' content is lost) when setting clocks
(due to module standby functionality) to be able to implement runtime PM
move the DBAT configuration in the driver's ndo_open API.

This commit prepares the code for the addition of runtime PM.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
---

Changes in v2:
- none; this patch is new

 drivers/net/ethernet/renesas/ravb_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 04eaa1967651..6b8ca08be35e 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -1822,6 +1822,7 @@ static int ravb_open(struct net_device *ndev)
 		napi_enable(&priv->napi[RAVB_NC]);
 
 	ravb_set_delay_mode(ndev);
+	ravb_write(ndev, priv->desc_bat_dma, DBAT);
 
 	/* Device init */
 	error = ravb_dmac_init(ndev);
@@ -2841,7 +2842,6 @@ static int ravb_probe(struct platform_device *pdev)
 	}
 	for (q = RAVB_BE; q < DBAT_ENTRY_NUM; q++)
 		priv->desc_bat[q].die_dt = DT_EOS;
-	ravb_write(ndev, priv->desc_bat_dma, DBAT);
 
 	/* Initialise HW timestamp list */
 	INIT_LIST_HEAD(&priv->ts_skb_list);
-- 
2.39.2