target/linux/generic/backport-5.10/735-v5.14-19-net-dsa-qca8k-enlarge-mdio-delay-and-timeout.patch

   1 From 617960d72e93de0f3fa52407e2d39e8c43e73b0a Mon Sep 17 00:00:00 2001
   2 From: Ansuel Smith <ansuelsmth@gmail.com>
   3 Date: Fri, 14 May 2021 23:00:09 +0200
   4 Subject: [PATCH] net: dsa: qca8k: enlarge mdio delay and timeout
   5
   6 The witch require some extra delay after setting page or the next
   7 read/write can use still use the old page. Add a delay after the
   8 set_page function to address this as it's done in QSDK legacy driver.
   9 Some timeouts were notice with VLAN and phy function, enlarge the
  10 mdio busy wait timeout to fix these problems.
  11
  12 Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
  13 Signed-off-by: David S. Miller <davem@davemloft.net>
  14 ---
  15  drivers/net/dsa/qca8k.c | 1 +
  16  drivers/net/dsa/qca8k.h | 2 +-
  17  2 files changed, 2 insertions(+), 1 deletion(-)
  18
  19 --- a/drivers/net/dsa/qca8k.c
  20 +++ b/drivers/net/dsa/qca8k.c
  21 @@ -143,6 +143,7 @@ qca8k_set_page(struct mii_bus *bus, u16
  22         }
  23
  24         qca8k_current_page = page;
  25 +       usleep_range(1000, 2000);
  26         return 0;
  27  }
  28
  29 --- a/drivers/net/dsa/qca8k.h
  30 +++ b/drivers/net/dsa/qca8k.h
  31 @@ -20,7 +20,7 @@
  32  #define PHY_ID_QCA8337                                 0x004dd036
  33  #define QCA8K_ID_QCA8337                               0x13
  34
  35 -#define QCA8K_BUSY_WAIT_TIMEOUT                                20
  36 +#define QCA8K_BUSY_WAIT_TIMEOUT                                2000
  37
  38  #define QCA8K_NUM_FDB_RECORDS                          2048
  39