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

Subsystems: arm port, arm/microchip (at91) soc support, the rest

STALE1812d

2 messages, 2 authors, 2021-08-27 · open the first message on its own page

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

From: <hidden>
Date: 2021-08-27 09:26:47 

From: Kavyasree Kotagiri <redacted>

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 <redacted>
---
 arch/arm/mach-at91/Kconfig   | 13 +++++++++++++
 arch/arm/mach-at91/Makefile  |  1 +
 arch/arm/mach-at91/lan966x.c | 31 +++++++++++++++++++++++++++++++
 3 files changed, 45 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..de689f854068
--- /dev/null
+++ b/arch/arm/mach-at91/lan966x.c
@@ -0,0 +1,31 @@
+// 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 void __init lan966x_dt_device_init(void)
+{
+	of_platform_default_populate(NULL, NULL, NULL);
+}
+
+static const char *const lan966x_dt_board_compat[] __initconst = {
+	"microchip,lan966x",
+	NULL
+};
+
+DT_MACHINE_START(lan966x_dt, "Microchip LAN966X")
+	/* Maintainer: Microchip */
+	.init_machine	= lan966x_dt_device_init,
+	.dt_compat	= lan966x_dt_board_compat,
+MACHINE_END
--
2.17.1


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

From: Alexandre Belloni <alexandre.belloni@bootlin.com>
Date: 2021-08-27 20:17:56 

Hello Kavya,

Thank you for the patch and the upstreaming effort!

On 27/08/2021 14:56:23+0530, kavyasree.kotagiri@microchip.com wrote:
quoted hunk
From: Kavyasree Kotagiri <redacted>

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 <redacted>
---
 arch/arm/mach-at91/Kconfig   | 13 +++++++++++++
 arch/arm/mach-at91/Makefile  |  1 +
 arch/arm/mach-at91/lan966x.c | 31 +++++++++++++++++++++++++++++++
 3 files changed, 45 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..de689f854068
--- /dev/null
+++ b/arch/arm/mach-at91/lan966x.c
@@ -0,0 +1,31 @@
+// 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 void __init lan966x_dt_device_init(void)
+{
+	of_platform_default_populate(NULL, NULL, NULL);
Are you sure this is needed? This is a workaround that is there on the
other platforms because of the at91 pinctrl driver. Ideally, you should
be able to boot without that. Can you confirm?

+}
+
+static const char *const lan966x_dt_board_compat[] __initconst = {
+	"microchip,lan966x",
+	NULL
+};
+
+DT_MACHINE_START(lan966x_dt, "Microchip LAN966X")
+	/* Maintainer: Microchip */
+	.init_machine	= lan966x_dt_device_init,
+	.dt_compat	= lan966x_dt_board_compat,
+MACHINE_END
--
2.17.1
-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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