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From b5f71652b85a85ea53162e9e2b760b84fd0d254f Mon Sep 17 00:00:00 2001
From: Robert Marko <robert.marko@sartura.hr>
Date: Mon, 1 Nov 2021 18:10:28 +0100
Subject: [PATCH] net: dsa: add Qualcomm IPQ4019 built-in switch support
Qualcomm IPQ40xx SoC-s have a variant of QCA8337N switch built-in.
It shares most of the stuff with its external counterpart, however it is
modified for the SoC.
Namely, it doesn't have second CPU port (Port 6), so it has 6 ports
instead of 7.
It also has no built-in PHY-s but rather requires external PSGMII based
companion PHY-s (QCA8072 and QCA8075) for which it first needs to carry
out calibration before using them.
PSGMII has a SoC built-in PHY that is used to connect to the PHY-s which
unfortunately requires some magic values as the datasheet doesnt document
the bits that are being set or the register at all.
Since its built-in it is MMIO like other peripherals and doesn't have its
own MDIO bus but depends on the SoC provided one.
CPU connection is at Port 0 and it uses some kind of a internal connection
and no traditional RGMII/SGMII.
It also doesn't use in-band tagging like other qca8k switches so a shinfo
based tagger is used.
Signed-off-by: Robert Marko <robert.marko@sartura.hr>
---
drivers/net/dsa/qca/Kconfig | 9 +++++++++
drivers/net/dsa/qca/Makefile | 1 +
2 files changed, 10 insertions(+)
--- a/drivers/net/dsa/qca/Kconfig
+++ b/drivers/net/dsa/qca/Kconfig
@@ -15,3 +15,13 @@ config NET_DSA_QCA8K
help
This enables support for the Qualcomm Atheros QCA8K Ethernet
switch chips.
+
+config NET_DSA_QCA8K_IPQ4019
+ tristate "Qualcomm Atheros IPQ4019 built-in Ethernet switch support"
+ depends on HAS_IOMEM && NET_DSA
+ select NET_DSA_TAG_IPQ4019
+ select REGMAP
+ help
+ This enables support for the Qualcomm Atheros IPQ4019 SoC built-in
+ Ethernet switch.
+
--- a/drivers/net/dsa/qca/Makefile
+++ b/drivers/net/dsa/qca/Makefile
@@ -1,4 +1,5 @@
# SPDX-License-Identifier: GPL-2.0-only
obj-$(CONFIG_NET_DSA_AR9331) += ar9331.o
+obj-$(CONFIG_NET_DSA_QCA8K_IPQ4019) += qca8k-ipq4019.o
obj-$(CONFIG_NET_DSA_QCA8K) += qca8k.o
qca8k-y += qca8k-common.o qca8k-8xxx.o
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