From 074c5b445e2544b110a16837e9cedb67ad31549d Mon Sep 17 00:00:00 2001
From: Antoine Tenart <antoine.tenart@bootlin.com>
Date: Fri, 26 Apr 2019 18:41:23 +0200
Subject: [PATCH 6/9] net: phy: micrel: make sure the factory test bit is
 cleared
Git-commit: 7a1d8390d015a13c42b1effa1f22fda0858fe6f9
Patch-mainline: v5.2-rc1
References: git-fixes

The KSZ8081 PHY has a factory test mode which is set at the de-assertion
of the reset line based on the RXER (KSZ8081RNA/RND) or TXC
(KSZ8081MNX/RNB) pin. If a pull-down is missing, or if the pin has a
pull-up, the factory test mode should be cleared by manually writing a 0
(according to the datasheet). This patch makes sure this factory test
bit is cleared in config_init().

Tested-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Denis Kirjanov <denis.kirjanov@suse.com>
---
 drivers/net/phy/micrel.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
index da5515342a02..c277a86f2f79 100644
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -33,6 +33,7 @@
 
 /* Operation Mode Strap Override */
 #define MII_KSZPHY_OMSO				0x16
+#define KSZPHY_OMSO_FACTORY_TEST		BIT(15)
 #define KSZPHY_OMSO_B_CAST_OFF			BIT(9)
 #define KSZPHY_OMSO_NAND_TREE_ON		BIT(5)
 #define KSZPHY_OMSO_RMII_OVERRIDE		BIT(1)
@@ -340,6 +341,18 @@ static int ksz8041_config_aneg(struct phy_device *phydev)
 	return genphy_config_aneg(phydev);
 }
 
+static int ksz8081_config_init(struct phy_device *phydev)
+{
+	/* KSZPHY_OMSO_FACTORY_TEST is set at de-assertion of the reset line
+	 * based on the RXER (KSZ8081RNA/RND) or TXC (KSZ8081MNX/RNB) pin. If a
+	 * pull-down is missing, the factory test mode should be cleared by
+	 * manually writing a 0.
+	 */
+	phy_clear_bits(phydev, MII_KSZPHY_OMSO, KSZPHY_OMSO_FACTORY_TEST);
+
+	return kszphy_config_init(phydev);
+}
+
 static int ksz8061_config_init(struct phy_device *phydev)
 {
 	int ret;
@@ -929,7 +942,7 @@ static struct phy_driver ksphy_driver[] = {
 	.flags		= PHY_HAS_INTERRUPT,
 	.driver_data	= &ksz8081_type,
 	.probe		= kszphy_probe,
-	.config_init	= kszphy_config_init,
+	.config_init	= ksz8081_config_init,
 	.ack_interrupt	= kszphy_ack_interrupt,
 	.config_intr	= kszphy_config_intr,
 	.get_sset_count = kszphy_get_sset_count,
-- 
2.16.4