netdev - [PATCH net-next 04/13] net: pcs: xpcs: provide a helper to get the phylink pcs given xpcs

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Message-Id: <E1swfQe-006DfI-Mj@rmk-PC.armlinux.org.uk>
Date: Fri, 04 Oct 2024 11:20:56 +0100
From: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
To: Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>
Cc: Alexandre Torgue <alexandre.torgue@...s.st.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Jiawen Wu <jiawenwu@...stnetic.com>,
	Jose Abreu <joabreu@...opsys.com>,
	Jose Abreu <Jose.Abreu@...opsys.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-stm32@...md-mailman.stormreply.com,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Mengyuan Lou <mengyuanlou@...-swift.com>,
	netdev@...r.kernel.org,
	Paolo Abeni <pabeni@...hat.com>,
	Vladimir Oltean <olteanv@...il.com>
Subject: [PATCH net-next 04/13] net: pcs: xpcs: provide a helper to get the
 phylink pcs given xpcs

Provide a helper to provide the pointer to the phylink_pcs struct
given a valid xpcs pointer. This will be necessary when we make
struct dw_xpcs private to pcs-xpcs.c

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c | 2 +-
 drivers/net/pcs/pcs-xpcs.c                        | 6 ++++++
 include/linux/pcs/pcs-xpcs.h                      | 1 +
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c
index 83ad7c7935e3..48acba5eb178 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c
@@ -451,7 +451,7 @@ static struct phylink_pcs *intel_mgbe_select_pcs(struct stmmac_priv *priv,
 	 * should always be an XPCS. The original code would always
 	 * return this if present.
 	 */
-	return &priv->hw->xpcs->pcs;
+	return xpcs_to_phylink_pcs(priv->hw->xpcs);
 }
 
 static int intel_mgbe_common_data(struct pci_dev *pdev,
diff --git a/drivers/net/pcs/pcs-xpcs.c b/drivers/net/pcs/pcs-xpcs.c
index 8bde87ab971f..a7f6d56183a7 100644
--- a/drivers/net/pcs/pcs-xpcs.c
+++ b/drivers/net/pcs/pcs-xpcs.c
@@ -132,6 +132,12 @@ xpcs_find_compat(struct dw_xpcs *xpcs, phy_interface_t interface)
 	return NULL;
 }
 
+struct phylink_pcs *xpcs_to_phylink_pcs(struct dw_xpcs *xpcs)
+{
+	return &xpcs->pcs;
+}
+EXPORT_SYMBOL_GPL(xpcs_to_phylink_pcs);
+
 int xpcs_get_an_mode(struct dw_xpcs *xpcs, phy_interface_t interface)
 {
 	const struct dw_xpcs_compat *compat;
diff --git a/include/linux/pcs/pcs-xpcs.h b/include/linux/pcs/pcs-xpcs.h
index abda475111d1..868515f3cc88 100644
--- a/include/linux/pcs/pcs-xpcs.h
+++ b/include/linux/pcs/pcs-xpcs.h
@@ -64,6 +64,7 @@ struct dw_xpcs {
 	bool need_reset;
 };
 
+struct phylink_pcs *xpcs_to_phylink_pcs(struct dw_xpcs *xpcs);
 int xpcs_get_an_mode(struct dw_xpcs *xpcs, phy_interface_t interface);
 void xpcs_get_interfaces(struct dw_xpcs *xpcs, unsigned long *interfaces);
 int xpcs_config_eee(struct dw_xpcs *xpcs, int mult_fact_100ns,
-- 
2.30.2