linux-kernel - Re: [PATCH 22/24] ARM: at91: sama7: introduce sama7 SoC family

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Date:   Wed, 31 Mar 2021 18:01:24 +0200
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Claudiu Beznea <claudiu.beznea@...rochip.com>
Cc:     nicolas.ferre@...rochip.com, ludovic.desroches@...rochip.com,
        robh+dt@...nel.org, linux@...linux.org.uk,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Eugen Hristev <eugen.hristev@...rochip.com>
Subject: Re: [PATCH 22/24] ARM: at91: sama7: introduce sama7 SoC family

On 31/03/2021 13:59:06+0300, Claudiu Beznea wrote:
> From: Eugen Hristev <eugen.hristev@...rochip.com>
> 
> Introduce new family of SoCs, sama7, and first SoC, sama7g5.
> 
> Signed-off-by: Eugen Hristev <eugen.hristev@...rochip.com>
> Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
> ---
>  arch/arm/mach-at91/Makefile |  1 +
>  arch/arm/mach-at91/sama7.c  | 48 +++++++++++++++++++++++++++++++++++++
>  2 files changed, 49 insertions(+)
>  create mode 100644 arch/arm/mach-at91/sama7.c
> 
> diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile
> index f565490f1b70..6cc6624cddac 100644
> --- a/arch/arm/mach-at91/Makefile
> +++ b/arch/arm/mach-at91/Makefile
> @@ -9,6 +9,7 @@ obj-$(CONFIG_SOC_AT91SAM9)	+= at91sam9.o
>  obj-$(CONFIG_SOC_SAM9X60)	+= sam9x60.o
>  obj-$(CONFIG_SOC_SAMA5)		+= sama5.o
>  obj-$(CONFIG_SOC_SAMV7)		+= samv7.o
> +obj-$(CONFIG_SOC_SAMA7)		+= sama7.o
>  
>  # Power Management
>  obj-$(CONFIG_ATMEL_PM)		+= pm.o pm_suspend.o
> diff --git a/arch/arm/mach-at91/sama7.c b/arch/arm/mach-at91/sama7.c
> new file mode 100644
> index 000000000000..e04cadb569ad
> --- /dev/null
> +++ b/arch/arm/mach-at91/sama7.c
> @@ -0,0 +1,48 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * Setup code for SAMA7
> + *
> + * 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 sama7_common_init(void)
> +{
> +	of_platform_default_populate(NULL, NULL, NULL);

Is this necessary? This is left as a workaround for the old SoCs using
pinctrl-at91. I guess this will be using pio4 so this has to be removed.

> +}
> +
> +static void __init sama7_dt_device_init(void)
> +{
> +	sama7_common_init();
> +}
> +
> +static const char *const sama7_dt_board_compat[] __initconst = {
> +	"microchip,sama7",
> +	NULL
> +};
> +
> +DT_MACHINE_START(sama7_dt, "Microchip SAMA7")
> +	/* Maintainer: Microchip */
> +	.init_machine	= sama7_dt_device_init,
> +	.dt_compat	= sama7_dt_board_compat,
> +MACHINE_END
> +
> +static const char *const sama7g5_dt_board_compat[] __initconst = {
> +	"microchip,sama7g5",
> +	NULL
> +};
> +
> +DT_MACHINE_START(sama7g5_dt, "Microchip SAMA7G5")
> +	/* Maintainer: Microchip */
> +	.init_machine	= sama7_dt_device_init,
> +	.dt_compat	= sama7g5_dt_board_compat,
> +MACHINE_END
> +
> -- 
> 2.25.1
> 

-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com