Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Subject: Re: [PATCH] ARM: bcm2835_defconfig: add minimal support for Raspberry
 Pi4
To:     Marek Szyprowski <m.szyprowski@samsung.com>,
        Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
        linux-rpi-kernel@lists.infradead.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
References: <CGME20200212102022eucas1p1c49daf15d3e63eda9a56124bc4eafb57@eucas1p1.samsung.com>
 <20200212102009.17428-1-m.szyprowski@samsung.com>
 <a1d66025baa13b2276b12405544fc7107aac8d6c.camel@suse.de>
 <5adcb2de-3570-9c4d-5e5b-726b94fb2029@samsung.com>
From:   Stefan Wahren <stefan.wahren@i2se.com>
Message-ID: <916c0113-9910-26cd-3720-15399fde507b@i2se.com>
Date:   Thu, 13 Feb 2020 10:59:46 +0100
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101
 Thunderbird/60.9.0
MIME-Version: 1.0
In-Reply-To: <5adcb2de-3570-9c4d-5e5b-726b94fb2029@samsung.com>
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
Content-Language: en-US
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Hi Marek,

On 13.02.20 08:35, Marek Szyprowski wrote:
> Hi Nicolas
>
> On 12.02.2020 19:31, Nicolas Saenz Julienne wrote:
>> Hi Marek,
>> On Wed, 2020-02-12 at 11:20 +0100, Marek Szyprowski wrote:
>>> Add drivers for the minimal set of devices needed to boot Raspberry Pi4
>>> board.
>>>
>>> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
>> Just so you know, the amount of support on the RPi4 you might be able to get
>> updating bcm2835_defconfig's config is very limited. Only 1GB of ram and no
>> PCIe (so no USBs).
> Yes, I know. A lots of core features is missing: SMP, HIGHMEM, LPAE, PCI 
> and so on, but having a possibility to boot RPi4 with this defconfig 
> increases the test coverage.

in case you want to increase test coverage, we better enable all
Raspberry Pi 4 relevant hardware parts (hwrng, thermal, PCI ...). This
is what we did for older Pi boards.

SMP, HIGHMEM, LPAE are different and shouldn't be enabled in
bcm2835_defconfig from my PoV.

Best regards
Stefan