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Message-Id: <20220822110358.2310055-5-o.rempel@pengutronix.de> Date: Mon, 22 Aug 2022 13:03:45 +0200 From: Oleksij Rempel <o.rempel@...gutronix.de> To: Woojung Huh <woojung.huh@...rochip.com>, UNGLinuxDriver@...rochip.com, Andrew Lunn <andrew@...n.ch>, Vivien Didelot <vivien.didelot@...il.com>, Florian Fainelli <f.fainelli@...il.com>, Vladimir Oltean <olteanv@...il.com>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com> Cc: Oleksij Rempel <o.rempel@...gutronix.de>, kernel@...gutronix.de, linux-kernel@...r.kernel.org, netdev@...r.kernel.org Subject: [PATCH net-next v2 04/17] net: dsa: microchip: allow to pass return values for PHY read/write accesses PHY access may end with errors on different levels. So, allow to forward return values where possible. Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de> --- drivers/net/dsa/microchip/ksz8.h | 4 ++-- drivers/net/dsa/microchip/ksz8795.c | 8 ++++++-- 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, 34 insertions(+), 20 deletions(-) diff --git a/drivers/net/dsa/microchip/ksz8.h b/drivers/net/dsa/microchip/ksz8.h index 42c50cc4d8536..8582b4b67d989 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 c79a5128235f9..f2dd75ee0e075 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 +789,8 @@ 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 e1702ff04b858..d986be78183c4 100644 --- a/drivers/net/dsa/microchip/ksz9477.c +++ b/drivers/net/dsa/microchip/ksz9477.c @@ -275,7 +275,7 @@ 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; @@ -323,19 +323,23 @@ 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 cd278b307b3c7..ce87e4e09ada8 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 816438d2ed640..089570e18fb7c 100644 --- a/drivers/net/dsa/microchip/ksz_common.c +++ b/drivers/net/dsa/microchip/ksz_common.c @@ -1117,8 +1117,11 @@ 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; } @@ -1126,8 +1129,11 @@ 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 aaa6a910d0819..baaeb60533faf 100644 --- a/drivers/net/dsa/microchip/ksz_common.h +++ b/drivers/net/dsa/microchip/ksz_common.h @@ -261,8 +261,8 @@ 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 4e0b1dccec270..5d78d034a62f1 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 daedd2bf20c1b..7b464f1fb5d88 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
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