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

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Date:   Thu, 8 Apr 2021 17:30:14 +0200
From:   Nicolas Ferre <nicolas.ferre@...rochip.com>
To:     Claudiu Beznea <claudiu.beznea@...rochip.com>,
        <alexandre.belloni@...tlin.com>, <ludovic.desroches@...rochip.com>,
        <robh+dt@...nel.org>, <linux@...linux.org.uk>
CC:     <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

Hi,

On 31/03/2021 at 12:59, 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

Nit: alphabetic order tells that it should be before samv7

>   
>   # 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);
> +}
> +
> +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

I'm not sure we need two DT_MACHINE_START() entries and associated 
functions right now. Probably the most generic one is sufficient.
We can add such distinction in the future if the need arises.

Regards,
   Nicolas

-- 
Nicolas Ferre