[PATCH v2] ARM: at91: add basic support for new SoC lan966x

[<kavyasree.kotagiri@microchip.com>]

From: Kavyasree Kotagiri <Kavyasree.Kotagiri@microchip.com>

This patch introduces Microchip LAN966X ARMv7 based SoC family
of multiport gigabit AVB/TSN-capable ethernet switches.
It supports two SKUs: 4-port LAN9662 with multiprotocol
processing support and 8-port LAN9668 switch.

LAN966X includes copper and serial ethernet interfaces,
peripheral interfaces such as PCIe, USB, TWI, SPI, UART, QSPI,
SD/eMMC, Parallel Interface (PI) as well as synchronization
and trigger inputs/outputs.

Signed-off-by: Kavya Sree Kotagiri <kavyasree.kotagiri@microchip.com>
---
v1 -> v2:
- Removed lan966x_dt_device_init().
  System boots fine without this function.

 arch/arm/mach-at91/Kconfig   | 13 +++++++++++++
 arch/arm/mach-at91/Makefile  |  1 +
 arch/arm/mach-at91/lan966x.c | 25 +++++++++++++++++++++++++
 3 files changed, 39 insertions(+)
 create mode 100644 arch/arm/mach-at91/lan966x.c

diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index ccd7e80ce943..06cb425af761 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -122,6 +122,14 @@ config SOC_SAM9X60
 	help
 	  Select this if you are using Microchip's SAM9X60 SoC
 
+config SOC_LAN966X
+	bool "ARMv7 based Microchip LAN966X SoC family"
+	depends on ARCH_MULTI_V7
+	select SOC_LAN966
+	select DW_APB_TIMER_OF
+	help
+	  This enables support for ARMv7 based Microchip LAN966X SoC family.
+
 comment "Clocksource driver selection"
 
 config ATMEL_CLOCKSOURCE_PIT
@@ -188,6 +196,11 @@ config SOC_SAMA5
 	select SOC_SAM_V7
 	select SRAM if PM
 
+config SOC_LAN966
+	bool
+	select ARM_GIC
+	select MEMORY
+
 config ATMEL_PM
 	bool
 
diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile
index f565490f1b70..93cfd5b4e6d4 100644
--- a/arch/arm/mach-at91/Makefile
+++ b/arch/arm/mach-at91/Makefile
@@ -6,6 +6,7 @@
 # CPU-specific support
 obj-$(CONFIG_SOC_AT91RM9200)	+= at91rm9200.o
 obj-$(CONFIG_SOC_AT91SAM9)	+= at91sam9.o
+obj-$(CONFIG_SOC_LAN966X)	+= lan966x.o
 obj-$(CONFIG_SOC_SAM9X60)	+= sam9x60.o
 obj-$(CONFIG_SOC_SAMA5)		+= sama5.o
 obj-$(CONFIG_SOC_SAMV7)		+= samv7.o
diff --git a/arch/arm/mach-at91/lan966x.c b/arch/arm/mach-at91/lan966x.c
new file mode 100644
index 000000000000..154d616569ae
--- /dev/null
+++ b/arch/arm/mach-at91/lan966x.c
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Setup code for LAN966X
+ *
+ * Copyright (C) 2021 Microchip Technology, Inc. and its subsidiaries
+ *
+ */
+
+#include <linux/of.h>
+#include <linux/of_platform.h>
+
+#include <asm/mach/arch.h>
+#include <asm/system_misc.h>
+
+#include "generic.h"
+
+static const char *const lan966x_dt_board_compat[] __initconst = {
+	"microchip,lan966x",
+	NULL
+};
+
+DT_MACHINE_START(lan966x_dt, "Microchip LAN966X")
+	/* Maintainer: Microchip */
+	.dt_compat	= lan966x_dt_board_compat,
+MACHINE_END
-- 
2.17.1