[PATCH RESEND net-next 0/4] enetc: code cleanups

[PATCH RESEND net-next 0/4] enetc: code cleanups

[Michael Walle]

This are some code cleanups in the MDIO part of the enetc. They are
intended to make the code more readable.

Michael Walle (4):
  enetc: drop unneeded indirection
  enetc: don't use macro magic for the readx_poll_timeout() callback
  enetc: drop MDIO_DATA() macro
  enetc: reorder macros and functions

 .../net/ethernet/freescale/enetc/enetc_mdio.c | 61 +++++++++----------
 1 file changed, 29 insertions(+), 32 deletions(-)

-- 
2.20.1

[PATCH RESEND net-next 1/4] enetc: drop unneeded indirection

[Michael Walle]

Before commit 6517798dd343 ("enetc: Make MDIO accessors more generic and
export to include/linux/fsl") these macros actually had some benefits.
But after the commit it just makes the code hard to read. Drop the macro
indirections.

Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 .../net/ethernet/freescale/enetc/enetc_mdio.c | 32 ++++++++-----------
 1 file changed, 14 insertions(+), 18 deletions(-)

diff --git a/drivers/net/ethernet/freescale/enetc/enetc_mdio.c b/drivers/net/ethernet/freescale/enetc/enetc_mdio.c
index ee0116ed4738..94fcc76dc590 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_mdio.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_mdio.c
@@ -14,21 +14,17 @@
 #define	ENETC_MDIO_DATA	0x8	/* MDIO data */
 #define	ENETC_MDIO_ADDR	0xc	/* MDIO address */
 
-static inline u32 _enetc_mdio_rd(struct enetc_mdio_priv *mdio_priv, int off)
+static inline u32 enetc_mdio_rd(struct enetc_mdio_priv *mdio_priv, int off)
 {
 	return enetc_port_rd_mdio(mdio_priv->hw, mdio_priv->mdio_base + off);
 }
 
-static inline void _enetc_mdio_wr(struct enetc_mdio_priv *mdio_priv, int off,
-				  u32 val)
+static inline void enetc_mdio_wr(struct enetc_mdio_priv *mdio_priv, int off,
+				 u32 val)
 {
 	enetc_port_wr_mdio(mdio_priv->hw, mdio_priv->mdio_base + off, val);
 }
 
-#define enetc_mdio_rd(mdio_priv, off) \
-	_enetc_mdio_rd(mdio_priv, ENETC_##off)
-#define enetc_mdio_wr(mdio_priv, off, val) \
-	_enetc_mdio_wr(mdio_priv, ENETC_##off, val)
 #define enetc_mdio_rd_reg(off)	enetc_mdio_rd(mdio_priv, off)
 
 #define MDIO_CFG_CLKDIV(x)	((((x) >> 1) & 0xff) << 8)
@@ -54,7 +50,7 @@ static int enetc_mdio_wait_complete(struct enetc_mdio_priv *mdio_priv)
 {
 	u32 val;
 
-	return readx_poll_timeout(enetc_mdio_rd_reg, MDIO_CFG, val,
+	return readx_poll_timeout(enetc_mdio_rd_reg, ENETC_MDIO_CFG, val,
 				  !(val & MDIO_CFG_BSY), 10, 10 * TIMEOUT);
 }
 
@@ -75,7 +71,7 @@ int enetc_mdio_write(struct mii_bus *bus, int phy_id, int regnum, u16 value)
 		mdio_cfg &= ~MDIO_CFG_ENC45;
 	}
 
-	enetc_mdio_wr(mdio_priv, MDIO_CFG, mdio_cfg);
+	enetc_mdio_wr(mdio_priv, ENETC_MDIO_CFG, mdio_cfg);
 
 	ret = enetc_mdio_wait_complete(mdio_priv);
 	if (ret)
@@ -83,11 +79,11 @@ int enetc_mdio_write(struct mii_bus *bus, int phy_id, int regnum, u16 value)
 
 	/* set port and dev addr */
 	mdio_ctl = MDIO_CTL_PORT_ADDR(phy_id) | MDIO_CTL_DEV_ADDR(dev_addr);
-	enetc_mdio_wr(mdio_priv, MDIO_CTL, mdio_ctl);
+	enetc_mdio_wr(mdio_priv, ENETC_MDIO_CTL, mdio_ctl);
 
 	/* set the register address */
 	if (regnum & MII_ADDR_C45) {
-		enetc_mdio_wr(mdio_priv, MDIO_ADDR, regnum & 0xffff);
+		enetc_mdio_wr(mdio_priv, ENETC_MDIO_ADDR, regnum & 0xffff);
 
 		ret = enetc_mdio_wait_complete(mdio_priv);
 		if (ret)
@@ -95,7 +91,7 @@ int enetc_mdio_write(struct mii_bus *bus, int phy_id, int regnum, u16 value)
 	}
 
 	/* write the value */
-	enetc_mdio_wr(mdio_priv, MDIO_DATA, MDIO_DATA(value));
+	enetc_mdio_wr(mdio_priv, ENETC_MDIO_DATA, MDIO_DATA(value));
 
 	ret = enetc_mdio_wait_complete(mdio_priv);
 	if (ret)
@@ -121,7 +117,7 @@ int enetc_mdio_read(struct mii_bus *bus, int phy_id, int regnum)
 		mdio_cfg &= ~MDIO_CFG_ENC45;
 	}
 
-	enetc_mdio_wr(mdio_priv, MDIO_CFG, mdio_cfg);
+	enetc_mdio_wr(mdio_priv, ENETC_MDIO_CFG, mdio_cfg);
 
 	ret = enetc_mdio_wait_complete(mdio_priv);
 	if (ret)
@@ -129,11 +125,11 @@ int enetc_mdio_read(struct mii_bus *bus, int phy_id, int regnum)
 
 	/* set port and device addr */
 	mdio_ctl = MDIO_CTL_PORT_ADDR(phy_id) | MDIO_CTL_DEV_ADDR(dev_addr);
-	enetc_mdio_wr(mdio_priv, MDIO_CTL, mdio_ctl);
+	enetc_mdio_wr(mdio_priv, ENETC_MDIO_CTL, mdio_ctl);
 
 	/* set the register address */
 	if (regnum & MII_ADDR_C45) {
-		enetc_mdio_wr(mdio_priv, MDIO_ADDR, regnum & 0xffff);
+		enetc_mdio_wr(mdio_priv, ENETC_MDIO_ADDR, regnum & 0xffff);
 
 		ret = enetc_mdio_wait_complete(mdio_priv);
 		if (ret)
@@ -141,21 +137,21 @@ int enetc_mdio_read(struct mii_bus *bus, int phy_id, int regnum)
 	}
 
 	/* initiate the read */
-	enetc_mdio_wr(mdio_priv, MDIO_CTL, mdio_ctl | MDIO_CTL_READ);
+	enetc_mdio_wr(mdio_priv, ENETC_MDIO_CTL, mdio_ctl | MDIO_CTL_READ);
 
 	ret = enetc_mdio_wait_complete(mdio_priv);
 	if (ret)
 		return ret;
 
 	/* return all Fs if nothing was there */
-	if (enetc_mdio_rd(mdio_priv, MDIO_CFG) & MDIO_CFG_RD_ER) {
+	if (enetc_mdio_rd(mdio_priv, ENETC_MDIO_CFG) & MDIO_CFG_RD_ER) {
 		dev_dbg(&bus->dev,
 			"Error while reading PHY%d reg at %d.%hhu\n",
 			phy_id, dev_addr, regnum);
 		return 0xffff;
 	}
 
-	value = enetc_mdio_rd(mdio_priv, MDIO_DATA) & 0xffff;
+	value = enetc_mdio_rd(mdio_priv, ENETC_MDIO_DATA) & 0xffff;
 
 	return value;
 }
-- 
2.20.1

[PATCH RESEND net-next 2/4] enetc: don't use macro magic for the readx_poll_timeout() callback

[Michael Walle]

The macro enetc_mdio_rd_reg() is just used in that particular case and
has a hardcoded parameter name "mdio_priv". Define a specific function
to use for readx_poll_timeout() instead. Also drop the TIMEOUT macro
since it is used just once.

Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Tested-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 drivers/net/ethernet/freescale/enetc/enetc_mdio.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/freescale/enetc/enetc_mdio.c b/drivers/net/ethernet/freescale/enetc/enetc_mdio.c
index 94fcc76dc590..665f7a0c71cb 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_mdio.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_mdio.c
@@ -25,8 +25,6 @@ static inline void enetc_mdio_wr(struct enetc_mdio_priv *mdio_priv, int off,
 	enetc_port_wr_mdio(mdio_priv->hw, mdio_priv->mdio_base + off, val);
 }
 
-#define enetc_mdio_rd_reg(off)	enetc_mdio_rd(mdio_priv, off)
-
 #define MDIO_CFG_CLKDIV(x)	((((x) >> 1) & 0xff) << 8)
 #define MDIO_CFG_BSY		BIT(0)
 #define MDIO_CFG_RD_ER		BIT(1)
@@ -45,13 +43,17 @@ static inline void enetc_mdio_wr(struct enetc_mdio_priv *mdio_priv, int off,
 #define MDIO_CTL_READ		BIT(15)
 #define MDIO_DATA(x)		((x) & 0xffff)
 
-#define TIMEOUT	1000
+static bool enetc_mdio_is_busy(struct enetc_mdio_priv *mdio_priv)
+{
+	return enetc_mdio_rd(mdio_priv, ENETC_MDIO_CFG) & MDIO_CFG_BSY;
+}
+
 static int enetc_mdio_wait_complete(struct enetc_mdio_priv *mdio_priv)
 {
-	u32 val;
+	bool is_busy;
 
-	return readx_poll_timeout(enetc_mdio_rd_reg, ENETC_MDIO_CFG, val,
-				  !(val & MDIO_CFG_BSY), 10, 10 * TIMEOUT);
+	return readx_poll_timeout(enetc_mdio_is_busy, mdio_priv,
+				  is_busy, !is_busy, 10, 10 * 1000);
 }
 
 int enetc_mdio_write(struct mii_bus *bus, int phy_id, int regnum, u16 value)
-- 
2.20.1

[PATCH RESEND net-next 3/4] enetc: drop MDIO_DATA() macro

[Michael Walle]

value is u16, masking with 0xffff is a nop. Drop it.

Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Tested-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 drivers/net/ethernet/freescale/enetc/enetc_mdio.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/freescale/enetc/enetc_mdio.c b/drivers/net/ethernet/freescale/enetc/enetc_mdio.c
index 665f7a0c71cb..591b16f01507 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_mdio.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_mdio.c
@@ -41,7 +41,6 @@ static inline void enetc_mdio_wr(struct enetc_mdio_priv *mdio_priv, int off,
 #define MDIO_CTL_DEV_ADDR(x)	((x) & 0x1f)
 #define MDIO_CTL_PORT_ADDR(x)	(((x) & 0x1f) << 5)
 #define MDIO_CTL_READ		BIT(15)
-#define MDIO_DATA(x)		((x) & 0xffff)
 
 static bool enetc_mdio_is_busy(struct enetc_mdio_priv *mdio_priv)
 {
@@ -93,7 +92,7 @@ int enetc_mdio_write(struct mii_bus *bus, int phy_id, int regnum, u16 value)
 	}
 
 	/* write the value */
-	enetc_mdio_wr(mdio_priv, ENETC_MDIO_DATA, MDIO_DATA(value));
+	enetc_mdio_wr(mdio_priv, ENETC_MDIO_DATA, value);
 
 	ret = enetc_mdio_wait_complete(mdio_priv);
 	if (ret)
-- 
2.20.1

[PATCH RESEND net-next 4/4] enetc: reorder macros and functions

[Michael Walle]

Now that there aren't any more macros with parameters, move the macros
above any functions.

Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 .../net/ethernet/freescale/enetc/enetc_mdio.c | 22 +++++++++----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/freescale/enetc/enetc_mdio.c b/drivers/net/ethernet/freescale/enetc/enetc_mdio.c
index 591b16f01507..70e6d97b380f 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_mdio.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_mdio.c
@@ -14,17 +14,6 @@
 #define	ENETC_MDIO_DATA	0x8	/* MDIO data */
 #define	ENETC_MDIO_ADDR	0xc	/* MDIO address */
 
-static inline u32 enetc_mdio_rd(struct enetc_mdio_priv *mdio_priv, int off)
-{
-	return enetc_port_rd_mdio(mdio_priv->hw, mdio_priv->mdio_base + off);
-}
-
-static inline void enetc_mdio_wr(struct enetc_mdio_priv *mdio_priv, int off,
-				 u32 val)
-{
-	enetc_port_wr_mdio(mdio_priv->hw, mdio_priv->mdio_base + off, val);
-}
-
 #define MDIO_CFG_CLKDIV(x)	((((x) >> 1) & 0xff) << 8)
 #define MDIO_CFG_BSY		BIT(0)
 #define MDIO_CFG_RD_ER		BIT(1)
@@ -42,6 +31,17 @@ static inline void enetc_mdio_wr(struct enetc_mdio_priv *mdio_priv, int off,
 #define MDIO_CTL_PORT_ADDR(x)	(((x) & 0x1f) << 5)
 #define MDIO_CTL_READ		BIT(15)
 
+static inline u32 enetc_mdio_rd(struct enetc_mdio_priv *mdio_priv, int off)
+{
+	return enetc_port_rd_mdio(mdio_priv->hw, mdio_priv->mdio_base + off);
+}
+
+static inline void enetc_mdio_wr(struct enetc_mdio_priv *mdio_priv, int off,
+				 u32 val)
+{
+	enetc_port_wr_mdio(mdio_priv->hw, mdio_priv->mdio_base + off, val);
+}
+
 static bool enetc_mdio_is_busy(struct enetc_mdio_priv *mdio_priv)
 {
 	return enetc_mdio_rd(mdio_priv, ENETC_MDIO_CFG) & MDIO_CFG_BSY;
-- 
2.20.1

Re: [PATCH RESEND net-next 0/4] enetc: code cleanups

[David Miller]

From: Michael Walle <michael@walle.cc>
Date: Mon, 28 Dec 2020 14:00:30 +0100

> This are some code cleanups in the MDIO part of the enetc. They are
> intended to make the code more readable.

Series applied, thank you.