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
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Hello Kavya, Thank you for the patch and the upstreaming effort! On 27/08/2021 14:56:23+0530, kavyasree.kotagiri@microchip.com wrote:
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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.cdiff --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 booldiff --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.odiff --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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel