linux-kernel - [PATCH net-next v2 6/9] net: phy: icplus: don't set APS

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Message-Id: <20210210164746.26336-7-michael@walle.cc>
Date:   Wed, 10 Feb 2021 17:47:43 +0100
From:   Michael Walle <michael@...le.cc>
To:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Michael Walle <michael@...le.cc>
Subject: [PATCH net-next v2 6/9] net: phy: icplus: don't set APS_EN bit on IP101G

This bit is reserved as 'always-write-1'. While this is not a particular
error, because we are only setting it, guard it by checking the model to
prevent errors in the future.

Signed-off-by: Michael Walle <michael@...le.cc>
---
Changes since v1:
 - dropped the model check. Instead use two different functions.

Andrew, I've dropped your Reviewed-by because of this.

 drivers/net/phy/icplus.c | 27 ++++++++++++++++++++-------
 1 file changed, 20 insertions(+), 7 deletions(-)

diff --git a/drivers/net/phy/icplus.c b/drivers/net/phy/icplus.c
index 1bc9baa9048f..2108f1dfa158 100644
--- a/drivers/net/phy/icplus.c
+++ b/drivers/net/phy/icplus.c
@@ -208,10 +208,10 @@ static int ip101a_g_probe(struct phy_device *phydev)
 	return 0;
 }
 
-static int ip101a_g_config_init(struct phy_device *phydev)
+static int ip101a_g_config_intr_pin(struct phy_device *phydev)
 {
 	struct ip101a_g_phy_priv *priv = phydev->priv;
-	int err, c;
+	int err;
 
 	/* configure the RXER/INTR_32 pin of the 32-pin IP101GR if needed: */
 	switch (priv->sel_intr32) {
@@ -241,11 +241,24 @@ static int ip101a_g_config_init(struct phy_device *phydev)
 		break;
 	}
 
+	return 0;
+}
+
+static int ip101a_config_init(struct phy_device *phydev)
+{
+	int ret;
+
 	/* Enable Auto Power Saving mode */
-	c = phy_read(phydev, IP10XX_SPEC_CTRL_STATUS);
-	c |= IP101A_G_APS_ON;
+	ret = phy_set_bits(phydev, IP10XX_SPEC_CTRL_STATUS, IP101A_G_APS_ON);
+	if (ret)
+		return ret;
 
-	return phy_write(phydev, IP10XX_SPEC_CTRL_STATUS, c);
+	return ip101a_g_config_intr_pin(phydev);
+}
+
+static int ip101g_config_init(struct phy_device *phydev)
+{
+	return ip101a_g_config_intr_pin(phydev);
 }
 
 static int ip101a_g_ack_interrupt(struct phy_device *phydev)
@@ -380,7 +393,7 @@ static struct phy_driver icplus_driver[] = {
 	.probe		= ip101a_g_probe,
 	.config_intr	= ip101a_g_config_intr,
 	.handle_interrupt = ip101a_g_handle_interrupt,
-	.config_init	= ip101a_g_config_init,
+	.config_init	= ip101a_config_init,
 	.soft_reset	= genphy_soft_reset,
 	.suspend	= genphy_suspend,
 	.resume		= genphy_resume,
@@ -391,7 +404,7 @@ static struct phy_driver icplus_driver[] = {
 	.probe		= ip101a_g_probe,
 	.config_intr	= ip101a_g_config_intr,
 	.handle_interrupt = ip101a_g_handle_interrupt,
-	.config_init	= ip101a_g_config_init,
+	.config_init	= ip101g_config_init,
 	.soft_reset	= genphy_soft_reset,
 	.suspend	= genphy_suspend,
 	.resume		= genphy_resume,
-- 
2.20.1