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

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Date:   Thu, 1 Apr 2021 09:38:56 +0000
From:   <Claudiu.Beznea@...rochip.com>
To:     <alexandre.belloni@...tlin.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@...rochip.com>
Subject: Re: [PATCH 22/24] ARM: at91: sama7: introduce sama7 SoC family

On 31.03.2021 19:01, Alexandre Belloni wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> 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.

OK, I'll have a look. BTW, SAMA5D2 which is also using PIO4 calls
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
>> +
>> --
>> 2.25.1
>>
> 
> --
> Alexandre Belloni, co-owner and COO, Bootlin
> Embedded Linux and Kernel engineering
> https://bootlin.com
>