target/linux/generic/pending-5.15/776-net-dsa-b53-mmap-add-phy-ops.patch

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  64 From: =?utf-8?q?=C3=81lvaro_Fern=C3=A1ndez_Rojas?=  <noltari@gmail.com>
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  69 Cc: =?utf-8?q?=C3=81lvaro_Fern=C3=A1ndez_Rojas?=  <noltari@gmail.com>
  70 Subject: [PATCH] net: dsa: b53: mmap: add phy ops
  71 Date: Thu, 23 Mar 2023 20:48:41 +0100
  72 Message-Id: <20230323194841.1431878-1-noltari@gmail.com>
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  76 List-ID: <netdev.vger.kernel.org>
  77 X-Mailing-List: netdev@vger.kernel.org
  78 X-Patchwork-Delegate: kuba@kernel.org
  79
  80 Implement phy_read16() and phy_write16() ops for B53 MMAP to avoid accessing
  81 B53_PORT_MII_PAGE registers which hangs the device.
  82 This access should be done through the MDIO Mux bus controller.
  83
  84 Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
  85 ---
  86  drivers/net/dsa/b53/b53_mmap.c | 14 ++++++++++++++
  87  1 file changed, 14 insertions(+)
  88
  89 --- a/drivers/net/dsa/b53/b53_mmap.c
  90 +++ b/drivers/net/dsa/b53/b53_mmap.c
  91 @@ -216,6 +216,18 @@ static int b53_mmap_write64(struct b53_d
  92         return 0;
  93  }
  94
  95 +static int b53_mmap_phy_read16(struct b53_device *dev, int addr, int reg,
  96 +                              u16 *value)
  97 +{
  98 +       return -EIO;
  99 +}
 100 +
 101 +static int b53_mmap_phy_write16(struct b53_device *dev, int addr, int reg,
 102 +                               u16 value)
 103 +{
 104 +       return -EIO;
 105 +}
 106 +
 107  static const struct b53_io_ops b53_mmap_ops = {
 108         .read8 = b53_mmap_read8,
 109         .read16 = b53_mmap_read16,
 110 @@ -227,6 +239,8 @@ static const struct b53_io_ops b53_mmap_
 111         .write32 = b53_mmap_write32,
 112         .write48 = b53_mmap_write48,
 113         .write64 = b53_mmap_write64,
 114 +       .phy_read16 = b53_mmap_phy_read16,
 115 +       .phy_write16 = b53_mmap_phy_write16,
 116  };
 117
 118  static int b53_mmap_probe_of(struct platform_device *pdev,