linux-kernel - [PATCH net-next 1/2] net: pcs: xpcs: introduce xpcs

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Message-Id: <20210928041938.3936497-2-vee.khee.wong@linux.intel.com>
Date:   Tue, 28 Sep 2021 12:19:37 +0800
From:   Wong Vee Khee <vee.khee.wong@...ux.intel.com>
To:     Andrew Lunn <andrew@...n.ch>, Jose Abreu <Jose.Abreu@...opsys.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Vladimir Oltean <vladimir.oltean@....com>,
        Wong Vee Khee <veekhee@...il.com>
Subject: [PATCH net-next 1/2] net: pcs: xpcs: introduce xpcs_modify() helper function

In some cases we need to call mdiobus_modify() to avoid calling
mdiobus_write() when it is not required.

Introduce a xpcs_modify() helper function that allow us to call
mdiobus_modify() in the pcs-xpcs module.

Signed-off-by: Wong Vee Khee <vee.khee.wong@...ux.intel.com>
---
 drivers/net/pcs/pcs-xpcs.c | 9 +++++++++
 drivers/net/pcs/pcs-xpcs.h | 1 +
 2 files changed, 10 insertions(+)

diff --git a/drivers/net/pcs/pcs-xpcs.c b/drivers/net/pcs/pcs-xpcs.c
index fb0a83dc09ac..da8c81d25edd 100644
--- a/drivers/net/pcs/pcs-xpcs.c
+++ b/drivers/net/pcs/pcs-xpcs.c
@@ -191,6 +191,15 @@ int xpcs_write(struct dw_xpcs *xpcs, int dev, u32 reg, u16 val)
 	return mdiobus_write(bus, addr, reg_addr, val);
 }
 
+int xpcs_modify(struct dw_xpcs *xpcs, int dev, u32 reg, u16 mask, u16 set)
+{
+	u32 reg_addr = mdiobus_c45_addr(dev, reg);
+	struct mii_bus *bus = xpcs->mdiodev->bus;
+	int addr = xpcs->mdiodev->addr;
+
+	return mdiobus_modify(bus, addr, reg_addr, mask, set);
+}
+
 static int xpcs_read_vendor(struct dw_xpcs *xpcs, int dev, u32 reg)
 {
 	return xpcs_read(xpcs, dev, DW_VENDOR | reg);
diff --git a/drivers/net/pcs/pcs-xpcs.h b/drivers/net/pcs/pcs-xpcs.h
index 35651d32a224..fdb870333395 100644
--- a/drivers/net/pcs/pcs-xpcs.h
+++ b/drivers/net/pcs/pcs-xpcs.h
@@ -109,6 +109,7 @@
 
 int xpcs_read(struct dw_xpcs *xpcs, int dev, u32 reg);
 int xpcs_write(struct dw_xpcs *xpcs, int dev, u32 reg, u16 val);
+int xpcs_modify(struct dw_xpcs *xpcs, int dev, u32 reg, u16 mask, u16 set);
 
 int nxp_sja1105_sgmii_pma_config(struct dw_xpcs *xpcs);
 int nxp_sja1110_sgmii_pma_config(struct dw_xpcs *xpcs);
-- 
2.25.1