netdev - [PATCH v3 4/7] ARM i.MX6q: remove clk-out fixup for the Atheros AR8031 and AR8035 PHYs

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Date:   Tue, 11 May 2021 06:37:32 +0200
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>
Cc:     Oleksij Rempel <o.rempel@...gutronix.de>, kernel@...gutronix.de,
        netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-imx@....com,
        Fabio Estevam <festevam@...il.com>,
        David Jander <david@...tonic.nl>,
        Russell King <linux@...linux.org.uk>,
        Philippe Schenker <philippe.schenker@...adex.com>
Subject: [PATCH v3 4/7] ARM i.MX6q: remove clk-out fixup for the Atheros AR8031 and AR8035 PHYs

This configuration should be set over device tree.

If this patch breaks network functionality on your system, enable the
AT803X_PHY driver and set following device tree property in the PHY
node:

    qca,clk-out-frequency = <125000000>;

Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
---
 arch/arm/mach-imx/mach-imx6q.c | 30 ------------------------------
 1 file changed, 30 deletions(-)

diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c
index 4c840e116003..d12b571a61ac 100644
--- a/arch/arm/mach-imx/mach-imx6q.c
+++ b/arch/arm/mach-imx/mach-imx6q.c
@@ -68,25 +68,6 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8609, ventana_pciesw_early_fixup);
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8606, ventana_pciesw_early_fixup);
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8604, ventana_pciesw_early_fixup);
 
-static int ar8031_phy_fixup(struct phy_device *dev)
-{
-	u16 val;
-
-	/* To enable AR8031 output a 125MHz clk from CLK_25M */
-	phy_write(dev, 0xd, 0x7);
-	phy_write(dev, 0xe, 0x8016);
-	phy_write(dev, 0xd, 0x4007);
-
-	val = phy_read(dev, 0xe);
-	val &= 0xffe3;
-	val |= 0x18;
-	phy_write(dev, 0xe, val);
-
-	return 0;
-}
-
-#define PHY_ID_AR8031	0x004dd074
-
 static int ar8035_phy_fixup(struct phy_device *dev)
 {
 	u16 val;
@@ -101,15 +82,6 @@ static int ar8035_phy_fixup(struct phy_device *dev)
 	val = phy_read(dev, 0xe);
 	phy_write(dev, 0xe, val & ~(1 << 8));
 
-	/*
-	 * Enable 125MHz clock from CLK_25M on the AR8031.  This
-	 * is fed in to the IMX6 on the ENET_REF_CLK (V22) pad.
-	 * Also, introduce a tx clock delay.
-	 *
-	 * This is the same as is the AR8031 fixup.
-	 */
-	ar8031_phy_fixup(dev);
-
 	return 0;
 }
 
@@ -120,8 +92,6 @@ static void __init imx6q_enet_phy_init(void)
 	if (IS_BUILTIN(CONFIG_PHYLIB)) {
 		phy_register_fixup_for_uid(PHY_ID_KSZ9021, MICREL_PHY_ID_MASK,
 				ksz9021rn_phy_fixup);
-		phy_register_fixup_for_uid(PHY_ID_AR8031, 0xffffffef,
-				ar8031_phy_fixup);
 		phy_register_fixup_for_uid(PHY_ID_AR8035, 0xffffffef,
 				ar8035_phy_fixup);
 	}
-- 
2.29.2