From:   =?UTF-8?q?Cl=C3=A9ment=20L=C3=A9ger?= <clement.leger@bootlin.com>
To:     Sergey Shtylyov <s.shtylyov@omp.ru>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        Magnus Damm <magnus.damm@gmail.com>,
        Giuseppe Cavallaro <peppe.cavallaro@st.com>,
        Alexandre Torgue <alexandre.torgue@foss.st.com>,
        Jose Abreu <joabreu@synopsys.com>,
        Maxime Coquelin <mcoquelin.stm32@gmail.com>,
        Russell King <linux@armlinux.org.uk>,
        Wong Vee Khee <veekhee@apple.com>,
        =?UTF-8?q?Cl=C3=A9ment=20L=C3=A9ger?= <clement.leger@bootlin.com>,
        Kurt Kanzenbach <kurt@linutronix.de>,
        Revanth Kumar Uppala <ruppala@nvidia.com>,
        Tan Tee Min <tee.min.tan@linux.intel.com>
Cc:     Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
        Herve Codina <herve.codina@bootlin.com>,
        =?UTF-8?q?Miqu=C3=A8l=20Raynal?= <miquel.raynal@bootlin.com>,
        Milan Stevanovic <milan.stevanovic@se.com>,
        Jimmy Lalande <jimmy.lalande@se.com>,
        Pascal Eberhard <pascal.eberhard@se.com>,
        Mohammad Athari Bin Ismail <mohammad.athari.ismail@intel.com>,
        Jon Hunter <jonathanh@nvidia.com>, netdev@vger.kernel.org,
        linux-renesas-soc@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org,
        linux-stm32@st-md-mailman.stormreply.com,
        linux-arm-kernel@lists.infradead.org
Subject: [PATCH net-next v2 2/6] net: stmmac: add support to use a generic phylink_pcs as PCS
Date:   Wed,  8 Feb 2023 17:41:59 +0100
Message-Id: <20230208164203.378153-3-clement.leger@bootlin.com>
In-Reply-To: <20230208164203.378153-1-clement.leger@bootlin.com>
References: <20230208164203.378153-1-clement.leger@bootlin.com>
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Precedence: bulk

Currently, the PCS is set based on the presence of the xpcs field. In
order to allow supporting other PCS, add a phylink_pcs pcs field to struct
mac_device_info which is used in stmmac_mac_select_pcs() to select the
correct PCS.

Signed-off-by: Clément Léger <clement.leger@bootlin.com>
---
 drivers/net/ethernet/stmicro/stmmac/common.h      | 2 ++
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 5 +----
 drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c | 1 +
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/common.h b/drivers/net/ethernet/stmicro/stmmac/common.h
index 6b5d96bced47..79fd67e8ab90 100644
--- a/drivers/net/ethernet/stmicro/stmmac/common.h
+++ b/drivers/net/ethernet/stmicro/stmmac/common.h
@@ -15,6 +15,7 @@
 #include <linux/netdevice.h>
 #include <linux/stmmac.h>
 #include <linux/phy.h>
+#include <linux/phylink.h>
 #include <linux/pcs/pcs-xpcs.h>
 #include <linux/module.h>
 #if IS_ENABLED(CONFIG_VLAN_8021Q)
@@ -518,6 +519,7 @@ struct mac_device_info {
 	const struct stmmac_tc_ops *tc;
 	const struct stmmac_mmc_ops *mmc;
 	struct dw_xpcs *xpcs;
+	struct phylink_pcs *phylink_pcs;
 	struct mii_regs mii;	/* MII register Addresses */
 	struct mac_link link;
 	void __iomem *pcsr;     /* vpointer to device CSRs */
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index f44e4e4b4f16..9a8721227b17 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -937,10 +937,7 @@ static struct phylink_pcs *stmmac_mac_select_pcs(struct phylink_config *config,
 {
 	struct stmmac_priv *priv = netdev_priv(to_net_dev(config->dev));
 
-	if (!priv->hw->xpcs)
-		return NULL;
-
-	return &priv->hw->xpcs->pcs;
+	return priv->hw->phylink_pcs;
 }
 
 static void stmmac_mac_config(struct phylink_config *config, unsigned int mode,
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
index 21aaa2730ac8..68deda5c5fa9 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
@@ -513,6 +513,7 @@ int stmmac_xpcs_setup(struct mii_bus *bus)
 		}
 
 		priv->hw->xpcs = xpcs;
+		priv->hw->phylink_pcs = &xpcs->pcs;
 		break;
 	}
 
-- 
2.39.0