target/linux/generic/backport-5.15/733-v6.2-04-net-mtk_eth_soc-add-pcs_get_state-implementation.patch

   1 From c000dca098002da193b98099df051c9ead0cacb4 Mon Sep 17 00:00:00 2001
   2 From: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
   3 Date: Thu, 27 Oct 2022 14:10:52 +0100
   4 Subject: [PATCH 03/10] net: mtk_eth_soc: add pcs_get_state() implementation
   5
   6 Add a pcs_get_state() implementation which uses the advertisements
   7 to compute the resulting link modes, and BMSR contents to determine
   8 negotiation and link status.
   9
  10 Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
  11 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
  12 ---
  13  drivers/net/ethernet/mediatek/mtk_sgmii.c | 15 +++++++++++++++
  14  1 file changed, 15 insertions(+)
  15
  16 --- a/drivers/net/ethernet/mediatek/mtk_sgmii.c
  17 +++ b/drivers/net/ethernet/mediatek/mtk_sgmii.c
  18 @@ -19,6 +19,20 @@ static struct mtk_pcs *pcs_to_mtk_pcs(st
  19         return container_of(pcs, struct mtk_pcs, pcs);
  20  }
  21
  22 +static void mtk_pcs_get_state(struct phylink_pcs *pcs,
  23 +                             struct phylink_link_state *state)
  24 +{
  25 +       struct mtk_pcs *mpcs = pcs_to_mtk_pcs(pcs);
  26 +       unsigned int bm, adv;
  27 +
  28 +       /* Read the BMSR and LPA */
  29 +       regmap_read(mpcs->regmap, SGMSYS_PCS_CONTROL_1, &bm);
  30 +       regmap_read(mpcs->regmap, SGMSYS_PCS_ADVERTISE, &adv);
  31 +
  32 +       phylink_mii_c22_pcs_decode_state(state, FIELD_GET(SGMII_BMSR, bm),
  33 +                                        FIELD_GET(SGMII_LPA, adv));
  34 +}
  35 +
  36  /* For SGMII interface mode */
  37  static void mtk_pcs_setup_mode_an(struct mtk_pcs *mpcs)
  38  {
  39 @@ -117,6 +131,7 @@ static void mtk_pcs_link_up(struct phyli
  40  }
  41
  42  static const struct phylink_pcs_ops mtk_pcs_ops = {
  43 +       .pcs_get_state = mtk_pcs_get_state,
  44         .pcs_config = mtk_pcs_config,
  45         .pcs_an_restart = mtk_pcs_restart_an,
  46         .pcs_link_up = mtk_pcs_link_up,