target/linux/generic/backport-6.6/790-22-v6.9-net-dsa-mt7530-get-rid-of-useless-error-returns-on-p.patch

   1 From 58670652cacb7c5752e01f29979d0ca4cdbfcc0a Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Ar=C4=B1n=C3=A7=20=C3=9CNAL?= <arinc.unal@arinc9.com>
   3 Date: Fri, 1 Mar 2024 12:43:00 +0200
   4 Subject: [PATCH 22/30] net: dsa: mt7530: get rid of useless error returns on
   5  phylink code path
   6 MIME-Version: 1.0
   7 Content-Type: text/plain; charset=UTF-8
   8 Content-Transfer-Encoding: 8bit
   9
  10 Remove error returns on the cases where they are already handled with the
  11 function the mac_port_get_caps member in mt753x_table points to.
  12
  13 mt7531_mac_config() is also called from mt7531_cpu_port_config() outside of
  14 phylink but the port and interface modes are already handled there.
  15
  16 Change the functions and the mac_port_config function pointer to void now
  17 that there're no error returns anymore.
  18
  19 Remove mt753x_is_mac_port() that used to help the said error returns.
  20
  21 On mt7531_mac_config(), switch to if statements to simplify the code.
  22
  23 Remove internal phy cases from mt753x_phylink_mac_config(), there is no
  24 need to check the interface mode as that's already handled with the
  25 function the mac_port_get_caps member in mt753x_table points to.
  26
  27 Acked-by: Daniel Golle <daniel@makrotopia.org>
  28 Tested-by: Daniel Golle <daniel@makrotopia.org>
  29 Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
  30 Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
  31 Signed-off-by: Paolo Abeni <pabeni@redhat.com>
  32 ---
  33  drivers/net/dsa/mt7530.c | 81 ++++++++--------------------------------
  34  drivers/net/dsa/mt7530.h |  6 +--
  35  2 files changed, 19 insertions(+), 68 deletions(-)
  36
  37 --- a/drivers/net/dsa/mt7530.c
  38 +++ b/drivers/net/dsa/mt7530.c
  39 @@ -2623,7 +2623,7 @@ static void mt7988_mac_port_get_caps(str
  40         }
  41  }
  42
  43 -static int
  44 +static void
  45  mt7530_mac_config(struct dsa_switch *ds, int port, unsigned int mode,
  46                   phy_interface_t interface)
  47  {
  48 @@ -2633,22 +2633,14 @@ mt7530_mac_config(struct dsa_switch *ds,
  49                 mt7530_setup_port5(priv->ds, interface);
  50         else if (port == 6)
  51                 mt7530_setup_port6(priv->ds, interface);
  52 -
  53 -       return 0;
  54  }
  55
  56 -static int mt7531_rgmii_setup(struct mt7530_priv *priv, u32 port,
  57 -                             phy_interface_t interface,
  58 -                             struct phy_device *phydev)
  59 +static void mt7531_rgmii_setup(struct mt7530_priv *priv, u32 port,
  60 +                              phy_interface_t interface,
  61 +                              struct phy_device *phydev)
  62  {
  63         u32 val;
  64
  65 -       if (priv->p5_sgmii) {
  66 -               dev_err(priv->dev, "RGMII mode is not available for port %d\n",
  67 -                       port);
  68 -               return -EINVAL;
  69 -       }
  70 -
  71         val = mt7530_read(priv, MT7531_CLKGEN_CTRL);
  72         val |= GP_CLK_EN;
  73         val &= ~GP_MODE_MASK;
  74 @@ -2676,20 +2668,14 @@ static int mt7531_rgmii_setup(struct mt7
  75                 case PHY_INTERFACE_MODE_RGMII_ID:
  76                         break;
  77                 default:
  78 -                       return -EINVAL;
  79 +                       break;
  80                 }
  81         }
  82 -       mt7530_write(priv, MT7531_CLKGEN_CTRL, val);
  83
  84 -       return 0;
  85 -}
  86 -
  87 -static bool mt753x_is_mac_port(u32 port)
  88 -{
  89 -       return (port == 5 || port == 6);
  90 +       mt7530_write(priv, MT7531_CLKGEN_CTRL, val);
  91  }
  92
  93 -static int
  94 +static void
  95  mt7531_mac_config(struct dsa_switch *ds, int port, unsigned int mode,
  96                   phy_interface_t interface)
  97  {
  98 @@ -2697,42 +2683,21 @@ mt7531_mac_config(struct dsa_switch *ds,
  99         struct phy_device *phydev;
 100         struct dsa_port *dp;
 101
 102 -       if (!mt753x_is_mac_port(port)) {
 103 -               dev_err(priv->dev, "port %d is not a MAC port\n", port);
 104 -               return -EINVAL;
 105 -       }
 106 -
 107 -       switch (interface) {
 108 -       case PHY_INTERFACE_MODE_RGMII:
 109 -       case PHY_INTERFACE_MODE_RGMII_ID:
 110 -       case PHY_INTERFACE_MODE_RGMII_RXID:
 111 -       case PHY_INTERFACE_MODE_RGMII_TXID:
 112 +       if (phy_interface_mode_is_rgmii(interface)) {
 113                 dp = dsa_to_port(ds, port);
 114                 phydev = dp->slave->phydev;
 115 -               return mt7531_rgmii_setup(priv, port, interface, phydev);
 116 -       case PHY_INTERFACE_MODE_SGMII:
 117 -       case PHY_INTERFACE_MODE_NA:
 118 -       case PHY_INTERFACE_MODE_1000BASEX:
 119 -       case PHY_INTERFACE_MODE_2500BASEX:
 120 -               /* handled in SGMII PCS driver */
 121 -               return 0;
 122 -       default:
 123 -               return -EINVAL;
 124 +               mt7531_rgmii_setup(priv, port, interface, phydev);
 125         }
 126 -
 127 -       return -EINVAL;
 128  }
 129
 130 -static int
 131 +static void
 132  mt753x_mac_config(struct dsa_switch *ds, int port, unsigned int mode,
 133                   const struct phylink_link_state *state)
 134  {
 135         struct mt7530_priv *priv = ds->priv;
 136
 137 -       if (!priv->info->mac_port_config)
 138 -               return 0;
 139 -
 140 -       return priv->info->mac_port_config(ds, port, mode, state->interface);
 141 +       if (priv->info->mac_port_config)
 142 +               priv->info->mac_port_config(ds, port, mode, state->interface);
 143  }
 144
 145  static struct phylink_pcs *
 146 @@ -2761,17 +2726,11 @@ mt753x_phylink_mac_config(struct dsa_swi
 147         u32 mcr_cur, mcr_new;
 148
 149         switch (port) {
 150 -       case 0 ... 4:
 151 -               if (state->interface != PHY_INTERFACE_MODE_GMII &&
 152 -                   state->interface != PHY_INTERFACE_MODE_INTERNAL)
 153 -                       goto unsupported;
 154 -               break;
 155         case 5:
 156                 if (priv->p5_interface == state->interface)
 157                         break;
 158
 159 -               if (mt753x_mac_config(ds, port, mode, state) < 0)
 160 -                       goto unsupported;
 161 +               mt753x_mac_config(ds, port, mode, state);
 162
 163                 if (priv->p5_intf_sel != P5_DISABLED)
 164                         priv->p5_interface = state->interface;
 165 @@ -2780,16 +2739,10 @@ mt753x_phylink_mac_config(struct dsa_swi
 166                 if (priv->p6_interface == state->interface)
 167                         break;
 168
 169 -               if (mt753x_mac_config(ds, port, mode, state) < 0)
 170 -                       goto unsupported;
 171 +               mt753x_mac_config(ds, port, mode, state);
 172
 173                 priv->p6_interface = state->interface;
 174                 break;
 175 -       default:
 176 -unsupported:
 177 -               dev_err(ds->dev, "%s: unsupported %s port: %i\n",
 178 -                       __func__, phy_modes(state->interface), port);
 179 -               return;
 180         }
 181
 182         mcr_cur = mt7530_read(priv, MT7530_PMCR_P(port));
 183 @@ -2872,7 +2825,6 @@ mt7531_cpu_port_config(struct dsa_switch
 184         struct mt7530_priv *priv = ds->priv;
 185         phy_interface_t interface;
 186         int speed;
 187 -       int ret;
 188
 189         switch (port) {
 190         case 5:
 191 @@ -2897,9 +2849,8 @@ mt7531_cpu_port_config(struct dsa_switch
 192         else
 193                 speed = SPEED_1000;
 194
 195 -       ret = mt7531_mac_config(ds, port, MLO_AN_FIXED, interface);
 196 -       if (ret)
 197 -               return ret;
 198 +       mt7531_mac_config(ds, port, MLO_AN_FIXED, interface);
 199 +
 200         mt7530_write(priv, MT7530_PMCR_P(port),
 201                      PMCR_CPU_PORT_SETTING(priv->id));
 202         mt753x_phylink_mac_link_up(ds, port, MLO_AN_FIXED, interface, NULL,
 203 --- a/drivers/net/dsa/mt7530.h
 204 +++ b/drivers/net/dsa/mt7530.h
 205 @@ -750,9 +750,9 @@ struct mt753x_info {
 206         void (*mac_port_validate)(struct dsa_switch *ds, int port,
 207                                   phy_interface_t interface,
 208                                   unsigned long *supported);
 209 -       int (*mac_port_config)(struct dsa_switch *ds, int port,
 210 -                              unsigned int mode,
 211 -                              phy_interface_t interface);
 212 +       void (*mac_port_config)(struct dsa_switch *ds, int port,
 213 +                               unsigned int mode,
 214 +                               phy_interface_t interface);
 215  };
 216
 217  /* struct mt7530_priv -        This is the main data structure for holding the state