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f12mr153746wro.207.1585325755799; Fri, 27 Mar 2020 09:15:55 -0700 (PDT) Received: from ziggy.stardust ([213.195.113.243]) by smtp.gmail.com with ESMTPSA id p13sm9121613wru.3.2020.03.27.09.15.54 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 27 Mar 2020 09:15:54 -0700 (PDT) Subject: Re: [PATCH] ARM: dts: bcm283x: Add cells encoding format to firmware bus To: Nicolas Saenz Julienne , Rob Herring , Florian Fainelli , Ray Jui , Scott Branden , bcm-kernel-feedback-list@broadcom.com Cc: devicetree@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20200326134413.12298-1-nsaenzjulienne@suse.de> From: Matthias Brugger Autocrypt: addr=matthias.bgg@gmail.com; prefer-encrypt=mutual; keydata= mQINBFP1zgUBEAC21D6hk7//0kOmsUrE3eZ55kjc9DmFPKIz6l4NggqwQjBNRHIMh04BbCMY fL3eT7ZsYV5nur7zctmJ+vbszoOASXUpfq8M+S5hU2w7sBaVk5rpH9yW8CUWz2+ZpQXPJcFa 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NMDbxcY26CMPK204jhRm9RG687qq6691hbiuAtWABeAsl1AS+mdS7aP/4uOM4kFCvXYgIHxP /BoVz9CZTMEVAZVzbRKyYCLUf1wLhcHzugTiONz9fWMBLLskKvq7m1tlr61mNgY9nVwwClMU uE7i1H9r/2/UXLd+pY82zcXhFrfmKuCDmOkB5xPsOMVQJH8I0/lbqfLAqfsxSb/X1VKaP243 jzi+DzD9cvj2K6eD5j5kcKJJQactXqfJvF1Eb+OnxlB1BCLE8D1rNkPO5O742Mq3MgDmq19l +abzEL6QDAAxn9md8KwrA3RtucNh87cHlDXfUBKa7SRvBjTczDg+HEPNk2u3hrz1j3l2rliQ y1UfYx7Vk/TrdwUIJgKS8QAr8Lw9WuvY2hSqL9vEjx8VAkPWNWPwrQ== Message-ID: <015ad553-86a2-c6ac-e515-f14df83cec26@gmail.com> Date: Fri, 27 Mar 2020 17:15:53 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: <20200326134413.12298-1-nsaenzjulienne@suse.de> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On 26/03/2020 14:44, Nicolas Saenz Julienne wrote: > With the introduction of 55c7c0621078 ("ARM: dts: bcm283x: Fix vc4's > firmware bus DMA limitations") the firmware bus has to comply with > /soc's DMA limitations. Ultimately linking both buses to a same > dma-ranges property. The patch (and author) missed the fact that a bus' > #address-cells and #size-cells properties are not inherited, but set to > a fixed value which, in this case, doesn't match /soc's. This, although > not breaking Linux's DMA mapping functionality, generates ugly dtc > warnings. > > Fix the issue by adding the correct address and size cells properties > under the firmware bus. > > Fixes: 55c7c0621078 ("ARM: dts: bcm283x: Fix vc4's firmware bus DMA limitations") > Signed-off-by: Nicolas Saenz Julienne Reviewed-by: Matthias Brugger > --- > arch/arm/boot/dts/bcm2835-rpi.dtsi | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/arch/arm/boot/dts/bcm2835-rpi.dtsi b/arch/arm/boot/dts/bcm2835-rpi.dtsi > index fd2c766e0f71..f7ae5a4530b8 100644 > --- a/arch/arm/boot/dts/bcm2835-rpi.dtsi > +++ b/arch/arm/boot/dts/bcm2835-rpi.dtsi > @@ -14,6 +14,9 @@ act { > soc { > firmware: firmware { > compatible = "raspberrypi,bcm2835-firmware", "simple-bus"; > + #address-cells = <1>; > + #size-cells = <1>; > + > mboxes = <&mailbox>; > dma-ranges; > }; >