git.openwrt.org Git - openwrt/staging/jow.git/blob

   1 From 955cc76d8074df943d59d559895007f91de8eed5 Mon Sep 17 00:00:00 2001
   2 From: Weijie Gao <weijie.gao@mediatek.com>
   3 Date: Fri, 20 May 2022 11:23:37 +0800
   4 Subject: [PATCH 18/25] net: mediatek: use regmap api to modify ethsys
   5  registers
   6
   7 The address returned by regmap_get_range() is not remapped. Directly r/w
   8 to this address is ok for ARM platforms since it's idential to the virtual
   9 address.
  10
  11 But for MIPS platform only virtual address should be used for access.
  12 To solve this issue, the regmap api regmap_read/regmap_write should be used
  13 since they will remap address before accessing.
  14
  15 Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
  16 Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
  17 ---
  18  drivers/net/mtk_eth.c | 22 +++++++++++-----------
  19  1 file changed, 11 insertions(+), 11 deletions(-)
  20
  21 --- a/drivers/net/mtk_eth.c
  22 +++ b/drivers/net/mtk_eth.c
  23 @@ -159,9 +159,10 @@ struct mtk_eth_priv {
  24
  25         void __iomem *fe_base;
  26         void __iomem *gmac_base;
  27 -       void __iomem *ethsys_base;
  28         void __iomem *sgmii_base;
  29
  30 +       struct regmap *ethsys_regmap;
  31 +
  32         struct mii_dev *mdio_bus;
  33         int (*mii_read)(struct mtk_eth_priv *priv, u8 phy, u8 reg);
  34         int (*mii_write)(struct mtk_eth_priv *priv, u8 phy, u8 reg, u16 val);
  35 @@ -233,7 +234,12 @@ static void mtk_gmac_rmw(struct mtk_eth_
  36  static void mtk_ethsys_rmw(struct mtk_eth_priv *priv, u32 reg, u32 clr,
  37                            u32 set)
  38  {
  39 -       clrsetbits_le32(priv->ethsys_base + reg, clr, set);
  40 +       uint val;
  41 +
  42 +       regmap_read(priv->ethsys_regmap, reg, &val);
  43 +       val &= ~clr;
  44 +       val |= set;
  45 +       regmap_write(priv->ethsys_regmap, reg, val);
  46  }
  47
  48  /* Direct MDIO clause 22/45 access via SoC */
  49 @@ -1427,15 +1433,9 @@ static int mtk_eth_of_to_plat(struct ude
  50         if (ret)
  51                 return ret;
  52
  53 -       regmap = syscon_node_to_regmap(args.node);
  54 -       if (IS_ERR(regmap))
  55 -               return PTR_ERR(regmap);
  56 -
  57 -       priv->ethsys_base = regmap_get_range(regmap, 0);
  58 -       if (!priv->ethsys_base) {
  59 -               dev_err(dev, "Unable to find ethsys\n");
  60 -               return -ENODEV;
  61 -       }
  62 +       priv->ethsys_regmap = syscon_node_to_regmap(args.node);
  63 +       if (IS_ERR(priv->ethsys_regmap))
  64 +               return PTR_ERR(priv->ethsys_regmap);
  65
  66         /* Reset controllers */
  67         ret = reset_get_by_name(dev, "fe", &priv->rst_fe);