target/linux/generic/backport-6.1/706-v6.6-02-net-phy-at803x-merge-qca8081-slave-seed-function.patch

   1 From f3db55ae860a82e1224a909072783ef850e5d228 Mon Sep 17 00:00:00 2001
   2 From: Luo Jie <quic_luoj@quicinc.com>
   3 Date: Sun, 16 Jul 2023 16:49:20 +0800
   4 Subject: [PATCH 2/6] net: phy: at803x: merge qca8081 slave seed function
   5
   6 merge the seed enablement and seed value configuration into
   7 one function, since the random seed value is needed to be
   8 configured when the seed is enabled.
   9
  10 Signed-off-by: Luo Jie <quic_luoj@quicinc.com>
  11 Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
  12 Signed-off-by: David S. Miller <davem@davemloft.net>
  13 ---
  14  drivers/net/phy/at803x.c | 29 +++++++++--------------------
  15  1 file changed, 9 insertions(+), 20 deletions(-)
  16
  17 --- a/drivers/net/phy/at803x.c
  18 +++ b/drivers/net/phy/at803x.c
  19 @@ -1730,24 +1730,19 @@ static int qca808x_phy_fast_retrain_conf
  20         return 0;
  21  }
  22
  23 -static int qca808x_phy_ms_random_seed_set(struct phy_device *phydev)
  24 -{
  25 -       u16 seed_value = prandom_u32_max(QCA808X_MASTER_SLAVE_SEED_RANGE);
  26 -
  27 -       return at803x_debug_reg_mask(phydev, QCA808X_PHY_DEBUG_LOCAL_SEED,
  28 -                       QCA808X_MASTER_SLAVE_SEED_CFG,
  29 -                       FIELD_PREP(QCA808X_MASTER_SLAVE_SEED_CFG, seed_value));
  30 -}
  31 -
  32  static int qca808x_phy_ms_seed_enable(struct phy_device *phydev, bool enable)
  33  {
  34 -       u16 seed_enable = 0;
  35 +       u16 seed_value;
  36
  37 -       if (enable)
  38 -               seed_enable = QCA808X_MASTER_SLAVE_SEED_ENABLE;
  39 +       if (!enable)
  40 +               return at803x_debug_reg_mask(phydev, QCA808X_PHY_DEBUG_LOCAL_SEED,
  41 +                               QCA808X_MASTER_SLAVE_SEED_ENABLE, 0);
  42
  43 +       seed_value = prandom_u32_max(QCA808X_MASTER_SLAVE_SEED_RANGE);
  44         return at803x_debug_reg_mask(phydev, QCA808X_PHY_DEBUG_LOCAL_SEED,
  45 -                       QCA808X_MASTER_SLAVE_SEED_ENABLE, seed_enable);
  46 +                       QCA808X_MASTER_SLAVE_SEED_CFG | QCA808X_MASTER_SLAVE_SEED_ENABLE,
  47 +                       FIELD_PREP(QCA808X_MASTER_SLAVE_SEED_CFG, seed_value) |
  48 +                       QCA808X_MASTER_SLAVE_SEED_ENABLE);
  49  }
  50
  51  static int qca808x_config_init(struct phy_device *phydev)
  52 @@ -1771,12 +1766,7 @@ static int qca808x_config_init(struct ph
  53         if (ret)
  54                 return ret;
  55
  56 -       /* Configure lower ramdom seed to make phy linked as slave mode */
  57 -       ret = qca808x_phy_ms_random_seed_set(phydev);
  58 -       if (ret)
  59 -               return ret;
  60 -
  61 -       /* Enable seed */
  62 +       /* Enable seed and configure lower ramdom seed to make phy linked as slave mode */
  63         ret = qca808x_phy_ms_seed_enable(phydev, true);
  64         if (ret)
  65                 return ret;
  66 @@ -1821,7 +1811,6 @@ static int qca808x_read_status(struct ph
  67                 if (phydev->master_slave_state == MASTER_SLAVE_STATE_ERR) {
  68                         qca808x_phy_ms_seed_enable(phydev, false);
  69                 } else {
  70 -                       qca808x_phy_ms_random_seed_set(phydev);
  71                         qca808x_phy_ms_seed_enable(phydev, true);
  72                 }
  73         }