linux-kernel - Re: [PATCH 2/2] ARM: dts: at91: sama5d2: map securam as device

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Message-ID: <c27ce6d6-ee64-af8b-7cd7-2f263653b5f9@microchip.com>
Date:   Wed, 2 Dec 2020 11:27:45 +0100
From:   Nicolas Ferre <nicolas.ferre@...rochip.com>
To:     Claudiu Beznea <claudiu.beznea@...rochip.com>,
        <robh+dt@...nel.org>, <alexandre.belloni@...tlin.com>,
        <ludovic.desroches@...rochip.com>
CC:     <sandeepsheriker.mallikarjun@...rochip.com>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] ARM: dts: at91: sama5d2: map securam as device

On 02/12/2020 at 10:57, Claudiu Beznea wrote:
> Due to strobe signal not being propagated from CPU to securam
> the securam needs to be mapped as device or strongly ordered memory
> to work properly. Otherwise, updating to one offset may affect
> the adjacent locations in securam.
> 
> Fixes: d4ce5f44d4409 ("ARM: dts: at91: sama5d2: Add securam node")
> Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>

Acked-by: Nicolas Ferre <nicolas.ferre@...rochip.com>

> ---
>   arch/arm/boot/dts/sama5d2.dtsi | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm/boot/dts/sama5d2.dtsi b/arch/arm/boot/dts/sama5d2.dtsi
> index 2ddc85dff8ce..6d399ac0385d 100644
> --- a/arch/arm/boot/dts/sama5d2.dtsi
> +++ b/arch/arm/boot/dts/sama5d2.dtsi
> @@ -656,6 +656,7 @@
>   				clocks = <&pmc PMC_TYPE_PERIPHERAL 51>;
>   				#address-cells = <1>;
>   				#size-cells = <1>;
> +				no-memory-wc;
>   				ranges = <0 0xf8044000 0x1420>;
>   			};
>   
> 


-- 
Nicolas Ferre