target/linux/generic/backport-5.15/743-v6.3-0005-net-dsa-b53-mmap-add-phy-ops.patch

   1 From 45977e58ce65ed0459edc9a0466d9dfea09463f5 Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= <noltari@gmail.com>
   3 Date: Thu, 23 Mar 2023 20:48:41 +0100
   4 Subject: [PATCH] net: dsa: b53: mmap: add phy ops
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 Implement phy_read16() and phy_write16() ops for B53 MMAP to avoid accessing
  10 B53_PORT_MII_PAGE registers which hangs the device.
  11 This access should be done through the MDIO Mux bus controller.
  12
  13 Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
  14 Acked-by: Florian Fainelli <f.fainelli@gmail.com>
  15 Signed-off-by: David S. Miller <davem@davemloft.net>
  16 ---
  17  drivers/net/dsa/b53/b53_mmap.c | 14 ++++++++++++++
  18  1 file changed, 14 insertions(+)
  19
  20 --- a/drivers/net/dsa/b53/b53_mmap.c
  21 +++ b/drivers/net/dsa/b53/b53_mmap.c
  22 @@ -216,6 +216,18 @@ static int b53_mmap_write64(struct b53_d
  23         return 0;
  24  }
  25
  26 +static int b53_mmap_phy_read16(struct b53_device *dev, int addr, int reg,
  27 +                              u16 *value)
  28 +{
  29 +       return -EIO;
  30 +}
  31 +
  32 +static int b53_mmap_phy_write16(struct b53_device *dev, int addr, int reg,
  33 +                               u16 value)
  34 +{
  35 +       return -EIO;
  36 +}
  37 +
  38  static const struct b53_io_ops b53_mmap_ops = {
  39         .read8 = b53_mmap_read8,
  40         .read16 = b53_mmap_read16,
  41 @@ -227,6 +239,8 @@ static const struct b53_io_ops b53_mmap_
  42         .write32 = b53_mmap_write32,
  43         .write48 = b53_mmap_write48,
  44         .write64 = b53_mmap_write64,
  45 +       .phy_read16 = b53_mmap_phy_read16,
  46 +       .phy_write16 = b53_mmap_phy_write16,
  47  };
  48
  49  static int b53_mmap_probe_of(struct platform_device *pdev,