linux-kernel - [RFC v6 net-next 4/9] net: mdio: mscc-miim: add ability to externally register phy reset control

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Message-Id: <20220129220221.2823127-5-colin.foster@in-advantage.com>
Date:   Sat, 29 Jan 2022 14:02:16 -0800
From:   Colin Foster <colin.foster@...advantage.com>
To:     linux-arm-kernel@...ts.infradead.org, linux-gpio@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Steen Hegelund <Steen.Hegelund@...rochip.com>,
        Lars Povlsen <lars.povlsen@...rochip.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Russell King <linux@...linux.org.uk>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Andrew Lunn <andrew@...n.ch>, UNGLinuxDriver@...rochip.com,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Vladimir Oltean <vladimir.oltean@....com>,
        Lee Jones <lee.jones@...aro.org>, katie.morris@...advantage.com
Subject: [RFC v6 net-next 4/9] net: mdio: mscc-miim: add ability to externally register phy reset control

The ocelot-ext driver requires the phys to be externally controlled by an
optional parameter. This commit exposes that variable so it can be
utilized.

Signed-off-by: Colin Foster <colin.foster@...advantage.com>
---
 drivers/net/dsa/ocelot/seville_vsc9953.c |  3 ++-
 drivers/net/mdio/mdio-mscc-miim.c        | 10 ++++++----
 include/linux/mdio/mdio-mscc-miim.h      |  3 ++-
 3 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/net/dsa/ocelot/seville_vsc9953.c b/drivers/net/dsa/ocelot/seville_vsc9953.c
index 8c1c9da61602..c6264e9f4c37 100644
--- a/drivers/net/dsa/ocelot/seville_vsc9953.c
+++ b/drivers/net/dsa/ocelot/seville_vsc9953.c
@@ -1021,7 +1021,8 @@ static int vsc9953_mdio_bus_alloc(struct ocelot *ocelot)
 
 	rc = mscc_miim_setup(dev, &bus, "VSC9953 internal MDIO bus",
 			     ocelot->targets[GCB],
-			     ocelot->map[GCB][GCB_MIIM_MII_STATUS & REG_MASK]);
+			     ocelot->map[GCB][GCB_MIIM_MII_STATUS & REG_MASK],
+			     NULL, 0);
 
 	if (rc) {
 		dev_err(dev, "failed to setup MDIO bus\n");
diff --git a/drivers/net/mdio/mdio-mscc-miim.c b/drivers/net/mdio/mdio-mscc-miim.c
index 6b14f3cf3891..07baf8390744 100644
--- a/drivers/net/mdio/mdio-mscc-miim.c
+++ b/drivers/net/mdio/mdio-mscc-miim.c
@@ -188,7 +188,8 @@ static const struct regmap_config mscc_miim_regmap_config = {
 };
 
 int mscc_miim_setup(struct device *dev, struct mii_bus **pbus, const char *name,
-		    struct regmap *mii_regmap, int status_offset)
+		    struct regmap *mii_regmap, int status_offset,
+		    struct regmap *phy_regmap, int phy_offset)
 {
 	struct mscc_miim_dev *miim;
 	struct mii_bus *bus;
@@ -210,6 +211,8 @@ int mscc_miim_setup(struct device *dev, struct mii_bus **pbus, const char *name,
 
 	miim->regs = mii_regmap;
 	miim->mii_status_offset = status_offset;
+	miim->phy_regs = phy_regmap;
+	miim->phy_reset_offset = phy_offset;
 
 	*pbus = bus;
 
@@ -257,15 +260,14 @@ static int mscc_miim_probe(struct platform_device *pdev)
 		}
 	}
 
-	ret = mscc_miim_setup(dev, &bus, "mscc_miim", mii_regmap, 0);
+	ret = mscc_miim_setup(&pdev->dev, &bus, "mscc_miim", mii_regmap, 0,
+			      phy_regmap, 0);
 	if (ret < 0) {
 		dev_err(dev, "Unable to setup the MDIO bus\n");
 		return ret;
 	}
 
 	miim = bus->priv;
-	miim->phy_regs = phy_regmap;
-	miim->phy_reset_offset = 0;
 
 	ret = of_mdiobus_register(bus, dev->of_node);
 	if (ret < 0) {
diff --git a/include/linux/mdio/mdio-mscc-miim.h b/include/linux/mdio/mdio-mscc-miim.h
index 5b4ed2c3cbb9..5a95e43f73f9 100644
--- a/include/linux/mdio/mdio-mscc-miim.h
+++ b/include/linux/mdio/mdio-mscc-miim.h
@@ -14,6 +14,7 @@
 
 int mscc_miim_setup(struct device *device, struct mii_bus **bus,
 		    const char *name, struct regmap *mii_regmap,
-		    int status_offset);
+		    int status_offset, struct regmap *phy_regmap,
+		    int phy_offset);
 
 #endif
-- 
2.25.1