Message-ID: <3908fa6f-dc33-4aac-c21f-4a676a3a6b23@microchip.com>
Date:   Tue, 24 Jan 2023 13:42:03 +0100
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Subject: Re: [PATCH] ARM: at91: remove unnecessary
 of_platform_default_populate calls
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From:   Nicolas Ferre <nicolas.ferre@microchip.com>
To:     <robh@kernel.org>,
        Alexandre Belloni <alexandre.belloni@bootlin.com>,
        <ryan.wanner@microchip.com>
CC:     <linux-kernel@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>
References: <20180711161443.GY16084@piout.net>
 <20230124112348.74198-1-nicolas.ferre@microchip.com>
Organization: microchip
In-Reply-To: <20230124112348.74198-1-nicolas.ferre@microchip.com>
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On 24/01/2023 at 12:23, nicolas.ferre@microchip.com wrote:
> From: Rob Herring <robh@kernel.org>
> 
> DO NOT APPLY: breaking boot on at91 (sama5d3 xplained / NAND at least)
> 
> The DT core will call of_platform_default_populate, so it is not
> necessary for machine specific code to call it unless there are custom
> match entries, auxdata or parent device. Neither of those apply here, so
> remove the call.
> 
> Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
> Cc: linux-arm-kernel@lists.infradead.org
> Signed-off-by: Rob Herring <robh@kernel.org>
> [nicolas.ferre@microchip.com: update to newest kernel, add sama7.c file]
> Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
> ---
> Rob, Alexandre,
> 
> This is the updated patch by Rob.
> Tested on sama5d3 xplained platform it fails at least with NAND and, as you
> observed Alexandre, SRAM.
> 
> The pinctrl patch [1] applied seem to solve the problem with GPIO/pinctrl.

Ref. missing:
[1] https://lore.kernel.org/all/20180712192222.32481-1-robh@kernel.org/

> 
> So, this move is not ready now, but we can make progress, little by little.
> 
> Best regards,
>    Nicolas
> 
>   arch/arm/mach-at91/at91rm9200.c | 5 -----
>   arch/arm/mach-at91/at91sam9.c   | 5 -----
>   arch/arm/mach-at91/sama5.c      | 7 +------
>   arch/arm/mach-at91/sama7.c      | 4 ----
>   4 files changed, 1 insertion(+), 20 deletions(-)
> 
> diff --git a/arch/arm/mach-at91/at91rm9200.c b/arch/arm/mach-at91/at91rm9200.c
> index 4f8186211619..e262f5459c76 100644
> --- a/arch/arm/mach-at91/at91rm9200.c
> +++ b/arch/arm/mach-at91/at91rm9200.c
> @@ -7,17 +7,12 @@
>    *                2012 Joachim Eastwood <manabian@gmail.com>
>    */
> 
> -#include <linux/of.h>
> -#include <linux/of_platform.h>
> -
>   #include <asm/mach/arch.h>
> 
>   #include "generic.h"
> 
>   static void __init at91rm9200_dt_device_init(void)
>   {
> -       of_platform_default_populate(NULL, NULL, NULL);
> -
>          at91rm9200_pm_init();
>   }
> 
> diff --git a/arch/arm/mach-at91/at91sam9.c b/arch/arm/mach-at91/at91sam9.c
> index 7e572189a5eb..74b4dd8403a2 100644
> --- a/arch/arm/mach-at91/at91sam9.c
> +++ b/arch/arm/mach-at91/at91sam9.c
> @@ -6,9 +6,6 @@
>    *                2011 Nicolas Ferre <nicolas.ferre@atmel.com>
>    */
> 
> -#include <linux/of.h>
> -#include <linux/of_platform.h>
> -
>   #include <asm/mach/arch.h>
>   #include <asm/system_misc.h>
> 
> @@ -16,8 +13,6 @@
> 
>   static void __init at91sam9_init(void)
>   {
> -       of_platform_default_populate(NULL, NULL, NULL);
> -
>          at91sam9_pm_init();
>   }
> 
> diff --git a/arch/arm/mach-at91/sama5.c b/arch/arm/mach-at91/sama5.c
> index bf2b5c6a18c6..79dfa257b3b4 100644
> --- a/arch/arm/mach-at91/sama5.c
> +++ b/arch/arm/mach-at91/sama5.c
> @@ -6,14 +6,11 @@
>    *                2013 Ludovic Desroches <ludovic.desroches@atmel.com>
>    */
> 
> -#include <linux/of.h>
> -#include <linux/of_platform.h>
> -
> -#include <asm/hardware/cache-l2x0.h>
>   #include <asm/mach/arch.h>
>   #include <asm/mach/map.h>
>   #include <asm/outercache.h>
>   #include <asm/system_misc.h>
> +#include <asm/hardware/cache-l2x0.h>
> 
>   #include "generic.h"
>   #include "sam_secure.h"
> @@ -32,7 +29,6 @@ static void __init sama5_secure_cache_init(void)
> 
>   static void __init sama5_dt_device_init(void)
>   {
> -       of_platform_default_populate(NULL, NULL, NULL);
>          sama5_pm_init();
>   }
> 
> @@ -61,7 +57,6 @@ MACHINE_END
> 
>   static void __init sama5d2_init(void)
>   {
> -       of_platform_default_populate(NULL, NULL, NULL);
>          sama5d2_pm_init();
>   }
> 
> diff --git a/arch/arm/mach-at91/sama7.c b/arch/arm/mach-at91/sama7.c
> index bd43733ede18..5faccfe9a9bb 100644
> --- a/arch/arm/mach-at91/sama7.c
> +++ b/arch/arm/mach-at91/sama7.c
> @@ -6,9 +6,6 @@
>    *
>    */
> 
> -#include <linux/of.h>
> -#include <linux/of_platform.h>
> -
>   #include <asm/mach/arch.h>
>   #include <asm/system_misc.h>
> 
> @@ -16,7 +13,6 @@
> 
>   static void __init sama7_dt_device_init(void)
>   {
> -       of_platform_default_populate(NULL, NULL, NULL);
>          sama7_pm_init();
>   }
> 
> --
> 2.34.1
> 
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

-- 
Nicolas Ferre