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From: Oleksij Rempel <o.rempel@pengutronix.de>
To: Woojung Huh <woojung.huh@microchip.com>,
	UNGLinuxDriver@microchip.com, Andrew Lunn <andrew@lunn.ch>,
	Vivien Didelot <vivien.didelot@gmail.com>,
	Florian Fainelli <f.fainelli@gmail.com>,
	Vladimir Oltean <olteanv@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>
Cc: Oleksij Rempel <o.rempel@pengutronix.de>,
	kernel@pengutronix.de, linux-kernel@vger.kernel.org,
	netdev@vger.kernel.org
Subject: [PATCH net-next v1 02/10] net: dsa: microchip: allow to pass return values for PHY read/write accesses
Date: Fri, 29 Jul 2022 15:03:38 +0200	[thread overview]
Message-ID: <20220729130346.2961889-3-o.rempel@pengutronix.de> (raw)
In-Reply-To: <20220729130346.2961889-1-o.rempel@pengutronix.de>

PHY access may end with errors on different levels. So, allow to forward
return values where possible.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
 drivers/net/dsa/microchip/ksz8.h         |  4 ++--
 drivers/net/dsa/microchip/ksz8795.c      |  9 +++++++--
 drivers/net/dsa/microchip/ksz9477.c      | 12 ++++++++----
 drivers/net/dsa/microchip/ksz9477.h      |  4 ++--
 drivers/net/dsa/microchip/ksz_common.c   | 10 ++++++++--
 drivers/net/dsa/microchip/ksz_common.h   |  4 ++--
 drivers/net/dsa/microchip/lan937x.h      |  4 ++--
 drivers/net/dsa/microchip/lan937x_main.c |  8 ++++----
 8 files changed, 35 insertions(+), 20 deletions(-)

diff --git a/drivers/net/dsa/microchip/ksz8.h b/drivers/net/dsa/microchip/ksz8.h
index 42c50cc4d853..8582b4b67d98 100644
--- a/drivers/net/dsa/microchip/ksz8.h
+++ b/drivers/net/dsa/microchip/ksz8.h
@@ -17,8 +17,8 @@ u32 ksz8_get_port_addr(int port, int offset);
 void ksz8_cfg_port_member(struct ksz_device *dev, int port, u8 member);
 void ksz8_flush_dyn_mac_table(struct ksz_device *dev, int port);
 void ksz8_port_setup(struct ksz_device *dev, int port, bool cpu_port);
-void ksz8_r_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 *val);
-void ksz8_w_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 val);
+int ksz8_r_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 *val);
+int ksz8_w_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 val);
 int ksz8_r_dyn_mac_table(struct ksz_device *dev, u16 addr, u8 *mac_addr,
 			 u8 *fid, u8 *src_port, u8 *timestamp, u16 *entries);
 int ksz8_r_sta_mac_table(struct ksz_device *dev, u16 addr,
diff --git a/drivers/net/dsa/microchip/ksz8795.c b/drivers/net/dsa/microchip/ksz8795.c
index c79a5128235f..4b39666cfc9c 100644
--- a/drivers/net/dsa/microchip/ksz8795.c
+++ b/drivers/net/dsa/microchip/ksz8795.c
@@ -552,7 +552,7 @@ static void ksz8_w_vlan_table(struct ksz_device *dev, u16 vid, u16 vlan)
 	ksz8_w_table(dev, TABLE_VLAN, addr, buf);
 }
 
-void ksz8_r_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 *val)
+int ksz8_r_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 *val)
 {
 	u8 restart, speed, ctrl, link;
 	int processed = true;
@@ -674,9 +674,11 @@ void ksz8_r_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 *val)
 	}
 	if (processed)
 		*val = data;
+
+	return 0;
 }
 
-void ksz8_w_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 val)
+int ksz8_w_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 val)
 {
 	u8 restart, speed, ctrl, data;
 	const u16 *regs;
@@ -787,6 +789,9 @@ void ksz8_w_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 val)
 	default:
 		break;
 	}
+
+
+	return 0;
 }
 
 void ksz8_cfg_port_member(struct ksz_device *dev, int port, u8 member)
diff --git a/drivers/net/dsa/microchip/ksz9477.c b/drivers/net/dsa/microchip/ksz9477.c
index 841f0d2b15c9..9d749537cf01 100644
--- a/drivers/net/dsa/microchip/ksz9477.c
+++ b/drivers/net/dsa/microchip/ksz9477.c
@@ -280,7 +280,7 @@ static void ksz9477_r_phy_quirks(struct ksz_device *dev, u16 addr, u16 reg,
 		*data &= ~(BMSR_ESTATEN | BMSR_ERCAP);
 }
 
-void ksz9477_r_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 *data)
+int ksz9477_r_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 *data)
 {
 	u16 val = 0xffff;
 
@@ -328,19 +328,23 @@ void ksz9477_r_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 *data)
 	}
 
 	*data = val;
+
+	return 0;
 }
 
-void ksz9477_w_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 val)
+int ksz9477_w_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 val)
 {
 	/* No real PHY after this. */
 	if (addr >= dev->phy_port_cnt)
-		return;
+		return 0;
 
 	/* No gigabit support.  Do not write to this register. */
 	if (!(dev->features & GBIT_SUPPORT) && reg == MII_CTRL1000)
-		return;
+		return 0;
 
 	ksz_pwrite16(dev, addr, 0x100 + (reg << 1), val);
+
+	return 0;
 }
 
 void ksz9477_cfg_port_member(struct ksz_device *dev, int port, u8 member)
diff --git a/drivers/net/dsa/microchip/ksz9477.h b/drivers/net/dsa/microchip/ksz9477.h
index cd278b307b3c..ce87e4e09ada 100644
--- a/drivers/net/dsa/microchip/ksz9477.h
+++ b/drivers/net/dsa/microchip/ksz9477.h
@@ -16,8 +16,8 @@ u32 ksz9477_get_port_addr(int port, int offset);
 void ksz9477_cfg_port_member(struct ksz_device *dev, int port, u8 member);
 void ksz9477_flush_dyn_mac_table(struct ksz_device *dev, int port);
 void ksz9477_port_setup(struct ksz_device *dev, int port, bool cpu_port);
-void ksz9477_r_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 *data);
-void ksz9477_w_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 val);
+int ksz9477_r_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 *data);
+int ksz9477_w_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 val);
 void ksz9477_r_mib_cnt(struct ksz_device *dev, int port, u16 addr, u64 *cnt);
 void ksz9477_r_mib_pkt(struct ksz_device *dev, int port, u16 addr,
 		       u64 *dropped, u64 *cnt);
diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index ed7d137cba99..71b5349d006a 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -1089,8 +1089,11 @@ static int ksz_phy_read16(struct dsa_switch *ds, int addr, int reg)
 {
 	struct ksz_device *dev = ds->priv;
 	u16 val = 0xffff;
+	int ret;
 
-	dev->dev_ops->r_phy(dev, addr, reg, &val);
+	ret = dev->dev_ops->r_phy(dev, addr, reg, &val);
+	if (ret)
+		return ret;
 
 	return val;
 }
@@ -1098,8 +1101,11 @@ static int ksz_phy_read16(struct dsa_switch *ds, int addr, int reg)
 static int ksz_phy_write16(struct dsa_switch *ds, int addr, int reg, u16 val)
 {
 	struct ksz_device *dev = ds->priv;
+	int ret;
 
-	dev->dev_ops->w_phy(dev, addr, reg, val);
+	ret = dev->dev_ops->w_phy(dev, addr, reg, val);
+	if (ret)
+		return ret;
 
 	return 0;
 }
diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h
index 764ada3a0f42..a06b9bf5938b 100644
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h
@@ -258,8 +258,8 @@ struct ksz_dev_ops {
 	void (*flush_dyn_mac_table)(struct ksz_device *dev, int port);
 	void (*port_cleanup)(struct ksz_device *dev, int port);
 	void (*port_setup)(struct ksz_device *dev, int port, bool cpu_port);
-	void (*r_phy)(struct ksz_device *dev, u16 phy, u16 reg, u16 *val);
-	void (*w_phy)(struct ksz_device *dev, u16 phy, u16 reg, u16 val);
+	int (*r_phy)(struct ksz_device *dev, u16 phy, u16 reg, u16 *val);
+	int (*w_phy)(struct ksz_device *dev, u16 phy, u16 reg, u16 val);
 	void (*r_mib_cnt)(struct ksz_device *dev, int port, u16 addr,
 			  u64 *cnt);
 	void (*r_mib_pkt)(struct ksz_device *dev, int port, u16 addr,
diff --git a/drivers/net/dsa/microchip/lan937x.h b/drivers/net/dsa/microchip/lan937x.h
index 4e0b1dccec27..5d78d034a62f 100644
--- a/drivers/net/dsa/microchip/lan937x.h
+++ b/drivers/net/dsa/microchip/lan937x.h
@@ -12,8 +12,8 @@ void lan937x_port_setup(struct ksz_device *dev, int port, bool cpu_port);
 void lan937x_config_cpu_port(struct dsa_switch *ds);
 int lan937x_switch_init(struct ksz_device *dev);
 void lan937x_switch_exit(struct ksz_device *dev);
-void lan937x_r_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 *data);
-void lan937x_w_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 val);
+int lan937x_r_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 *data);
+int lan937x_w_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 val);
 int lan937x_change_mtu(struct ksz_device *dev, int port, int new_mtu);
 void lan937x_phylink_get_caps(struct ksz_device *dev, int port,
 			      struct phylink_config *config);
diff --git a/drivers/net/dsa/microchip/lan937x_main.c b/drivers/net/dsa/microchip/lan937x_main.c
index daedd2bf20c1..7b464f1fb5d8 100644
--- a/drivers/net/dsa/microchip/lan937x_main.c
+++ b/drivers/net/dsa/microchip/lan937x_main.c
@@ -128,14 +128,14 @@ static int lan937x_internal_phy_read(struct ksz_device *dev, int addr, int reg,
 	return ksz_read16(dev, REG_VPHY_IND_DATA__2, val);
 }
 
-void lan937x_r_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 *data)
+int lan937x_r_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 *data)
 {
-	lan937x_internal_phy_read(dev, addr, reg, data);
+	return lan937x_internal_phy_read(dev, addr, reg, data);
 }
 
-void lan937x_w_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 val)
+int lan937x_w_phy(struct ksz_device *dev, u16 addr, u16 reg, u16 val)
 {
-	lan937x_internal_phy_write(dev, addr, reg, val);
+	return lan937x_internal_phy_write(dev, addr, reg, val);
 }
 
 static int lan937x_sw_mdio_read(struct mii_bus *bus, int addr, int regnum)
-- 
2.30.2


  parent reply	other threads:[~2022-07-29 13:04 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-07-29 13:03 [PATCH net-next v1 00/10] net: dsa: microchip: add error handling and register access validation Oleksij Rempel
2022-07-29 13:03 ` [PATCH net-next v1 01/10] net: dsa: microchip: don't announce extended register support on non Gbit chips Oleksij Rempel
2022-07-29 13:03 ` Oleksij Rempel [this message]
2022-08-02 11:19   ` [PATCH net-next v1 02/10] net: dsa: microchip: allow to pass return values for PHY read/write accesses Vladimir Oltean
2022-07-29 13:03 ` [PATCH net-next v1 03/10] net: dsa: microchip: forward error value on all ksz_pread/ksz_pwrite functions Oleksij Rempel
2022-08-02 11:19   ` Vladimir Oltean
2022-07-29 13:03 ` [PATCH net-next v1 04/10] net: dsa: microchip: ksz9477: add error handling to ksz9477_r/w_phy Oleksij Rempel
2022-08-02 11:24   ` Vladimir Oltean
2022-07-29 13:03 ` [PATCH net-next v1 05/10] net: dsa: microchip: ksz8795: add error handling to ksz8_r/w_phy Oleksij Rempel
2022-08-02 11:29   ` Vladimir Oltean
2022-07-29 13:03 ` [PATCH net-next v1 06/10] net: dsa: microchip: KSZ9893: do not write to not supported Output Clock Control Register Oleksij Rempel
2022-07-29 13:03 ` [PATCH net-next v1 07/10] net: dsa: microchip: warn about not supported synclko properties on KSZ9893 chips Oleksij Rempel
2022-08-02 11:36   ` Vladimir Oltean
2022-08-05 11:56     ` Oleksij Rempel
2022-08-05 13:42       ` Vladimir Oltean
2022-08-13 14:32         ` Oleksij Rempel
2022-08-13 15:11           ` Andrew Lunn
2022-08-13 16:18             ` Oleksij Rempel
2022-08-13 20:42               ` Andrew Lunn
2022-08-14  4:26                 ` Oleksij Rempel
2022-08-14  8:04                   ` Vladimir Oltean
2022-07-29 13:03 ` [PATCH net-next v1 08/10] net: dsa: microchip: add support for regmap_access_tables Oleksij Rempel
2022-07-29 13:03 ` [PATCH net-next v1 09/10] net: dsa: microchip: add regmap_range for KSZ8563 chip Oleksij Rempel
2022-08-01  5:11   ` Oleksij Rempel
2022-07-29 13:03 ` [PATCH net-next v1 10/10] net: dsa: microchip: ksz9477: remove MII_CTRL1000 check from ksz9477_w_phy() Oleksij Rempel

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