linux-kernel - [PATCH net-next v4 3/4] net: phy: smsc: LAN8710/20: add PHY_RST_AFTER_CLK

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Date:   Thu,  7 Dec 2017 15:43:57 +0100
From:   Richard Leitner <dev@...l1n.net>
To:     robh+dt@...nel.org, mark.rutland@....com, fugang.duan@....com,
        andrew@...n.ch, f.fainelli@...il.com, frowand.list@...il.com
Cc:     davem@...emloft.net, geert+renesas@...der.be,
        sergei.shtylyov@...entembedded.com, baruch@...s.co.il,
        david.wu@...k-chips.com, lukma@...x.de, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        richard.leitner@...data.com
Subject: [PATCH net-next v4 3/4] net: phy: smsc: LAN8710/20: add PHY_RST_AFTER_CLK_EN flag

From: Richard Leitner <richard.leitner@...data.com>

The Microchip/SMSC LAN8710/LAN8720 PHYs need (according to their
datasheet [1]) a continuous REF_CLK when configured to "REF_CLK In Mode".
Therefore set the PHY_RST_AFTER_CLK_EN flag for those PHYs to let the
ETH driver reset them after the REF_CLK is enabled.

[1] http://ww1.microchip.com/downloads/en/DeviceDoc/00002165B.pdf

Signed-off-by: Richard Leitner <richard.leitner@...data.com>
Reviewed-by: Andrew Lunn <andrew@...n.ch>
---
 drivers/net/phy/smsc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/phy/smsc.c b/drivers/net/phy/smsc.c
index a1961ba87e2b..be399d645224 100644
--- a/drivers/net/phy/smsc.c
+++ b/drivers/net/phy/smsc.c
@@ -312,7 +312,7 @@ static struct phy_driver smsc_phy_driver[] = {
 	.name		= "SMSC LAN8710/LAN8720",
 
 	.features	= PHY_BASIC_FEATURES,
-	.flags		= PHY_HAS_INTERRUPT,
+	.flags		= PHY_HAS_INTERRUPT | PHY_RST_AFTER_CLK_EN,
 
 	.probe		= smsc_phy_probe,
 
-- 
2.11.0