target/linux/ipq40xx/patches-5.15/705-net-dsa-add-Qualcomm-IPQ4019-built-in-switch-support.patch

   1 From b5f71652b85a85ea53162e9e2b760b84fd0d254f Mon Sep 17 00:00:00 2001
   2 From: Robert Marko <robert.marko@sartura.hr>
   3 Date: Mon, 1 Nov 2021 18:10:28 +0100
   4 Subject: [PATCH] net: dsa: add Qualcomm IPQ4019 built-in switch support
   5
   6 Qualcomm IPQ40xx SoC-s have a variant of QCA8337N switch built-in.
   7
   8 It shares most of the stuff with its external counterpart, however it is
   9 modified for the SoC.
  10 Namely, it doesn't have second CPU port (Port 6), so it has 6 ports
  11 instead of 7.
  12 It also has no built-in PHY-s but rather requires external PSGMII based
  13 companion PHY-s (QCA8072 and QCA8075) for which it first needs to carry
  14 out calibration before using them.
  15 PSGMII has a SoC built-in PHY that is used to connect to the PHY-s which
  16 unfortunately requires some magic values as the datasheet doesnt document
  17 the bits that are being set or the register at all.
  18
  19 Since its built-in it is MMIO like other peripherals and doesn't have its
  20 own MDIO bus but depends on the SoC provided one.
  21
  22 CPU connection is at Port 0 and it uses some kind of a internal connection
  23 and no traditional RGMII/SGMII.
  24 It also doesn't use in-band tagging like other qca8k switches so a shinfo
  25 based tagger is used.
  26
  27 Signed-off-by: Robert Marko <robert.marko@sartura.hr>
  28 ---
  29  drivers/net/dsa/qca/Kconfig  | 9 +++++++++
  30  drivers/net/dsa/qca/Makefile | 1 +
  31  2 files changed, 10 insertions(+)
  32
  33 --- a/drivers/net/dsa/qca/Kconfig
  34 +++ b/drivers/net/dsa/qca/Kconfig
  35 @@ -23,3 +23,13 @@ config NET_DSA_QCA8K_LEDS_SUPPORT
  36         help
  37           This enabled support for LEDs present on the Qualcomm Atheros
  38           QCA8K Ethernet switch chips.
  39 +
  40 +config NET_DSA_QCA8K_IPQ4019
  41 +       tristate "Qualcomm Atheros IPQ4019 built-in Ethernet switch support"
  42 +       depends on HAS_IOMEM && NET_DSA
  43 +       select NET_DSA_TAG_IPQ4019
  44 +       select REGMAP
  45 +       help
  46 +         This enables support for the Qualcomm Atheros IPQ4019 SoC built-in
  47 +         Ethernet switch.
  48 +
  49 --- a/drivers/net/dsa/qca/Makefile
  50 +++ b/drivers/net/dsa/qca/Makefile
  51 @@ -1,5 +1,6 @@
  52  # SPDX-License-Identifier: GPL-2.0-only
  53  obj-$(CONFIG_NET_DSA_AR9331)   += ar9331.o
  54 +obj-$(CONFIG_NET_DSA_QCA8K_IPQ4019)    += qca8k-ipq4019.o
  55  obj-$(CONFIG_NET_DSA_QCA8K)    += qca8k.o
  56  qca8k-y                        += qca8k-common.o qca8k-8xxx.o
  57  ifdef CONFIG_NET_DSA_QCA8K_LEDS_SUPPORT