target/linux/generic/pending-6.1/795-15-net-dsa-mt7530-explain-exposing-MDIO-bus-of-MT7531AE.patch

   1 From c45832fe783f468aaaace09ae95a30cbf0acf724 Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Ar=C4=B1n=C3=A7=20=C3=9CNAL?= <arinc.unal@arinc9.com>
   3 Date: Mon, 22 Apr 2024 10:15:22 +0300
   4 Subject: [PATCH 15/15] net: dsa: mt7530: explain exposing MDIO bus of MT7531AE
   5  better
   6 MIME-Version: 1.0
   7 Content-Type: text/plain; charset=UTF-8
   8 Content-Transfer-Encoding: 8bit
   9
  10 Unlike MT7531BE, the GPIO 6-12 pins are not used for RGMII on MT7531AE.
  11 Therefore, the GPIO 11-12 pins are set to function as MDC and MDIO to
  12 expose the MDIO bus of the switch. Replace the comment with a better
  13 explanation.
  14
  15 Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
  16 ---
  17  drivers/net/dsa/mt7530.c | 5 ++++-
  18  1 file changed, 4 insertions(+), 1 deletion(-)
  19
  20 --- a/drivers/net/dsa/mt7530.c
  21 +++ b/drivers/net/dsa/mt7530.c
  22 @@ -2626,7 +2626,10 @@ mt7531_setup(struct dsa_switch *ds)
  23         if (!priv->p5_sgmii) {
  24                 mt7531_pll_setup(priv);
  25         } else {
  26 -               /* Let ds->slave_mii_bus be able to access external phy. */
  27 +               /* Unlike MT7531BE, the GPIO 6-12 pins are not used for RGMII on
  28 +                * MT7531AE. Set the GPIO 11-12 pins to function as MDC and MDIO
  29 +                * to expose the MDIO bus of the switch.
  30 +                */
  31                 mt7530_rmw(priv, MT7531_GPIO_MODE1, MT7531_GPIO11_RG_RXD2_MASK,
  32                            MT7531_EXT_P_MDC_11);
  33                 mt7530_rmw(priv, MT7531_GPIO_MODE1, MT7531_GPIO12_RG_RXD3_MASK,