Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Subject: Re: [PATCH 2/3] ARM: dts: bcm2711: Update SPI nodes compatible
 strings
To:     Lukas Wunner <lukas@wunner.de>,
        Florian Fainelli <f.fainelli@gmail.com>
Cc:     linux-kernel@vger.kernel.org, Mark Brown <broonie@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
        Ray Jui <rjui@broadcom.com>,
        Scott Branden <sbranden@broadcom.com>,
        "maintainer:BROADCOM BCM281XX/BCM11XXX/BCM216XX ARM ARCHITE..." 
        <bcm-kernel-feedback-list@broadcom.com>,
        "open list:SPI SUBSYSTEM" <linux-spi@vger.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@vger.kernel.org>,
        "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" 
        <linux-rpi-kernel@lists.infradead.org>,
        "moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE" 
        <linux-arm-kernel@lists.infradead.org>,
        Martin Sperl <kernel@martin.sperl.org>
References: <20200604034655.15930-1-f.fainelli@gmail.com>
 <20200604034655.15930-3-f.fainelli@gmail.com>
 <20200604042038.jzolu6k7q3d6bsvq@wunner.de>
From:   Florian Fainelli <f.fainelli@gmail.com>
Message-ID: <15c3995e-87de-0f2b-3424-5dd698b181d3@gmail.com>
Date:   Thu, 4 Jun 2020 09:40:12 -0700
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101
 Firefox/68.0 Thunderbird/68.8.1
MIME-Version: 1.0
In-Reply-To: <20200604042038.jzolu6k7q3d6bsvq@wunner.de>
Content-Type: text/plain; charset=utf-8
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk


On 6/3/2020 9:20 PM, Lukas Wunner wrote:
> On Wed, Jun 03, 2020 at 08:46:54PM -0700, Florian Fainelli wrote:
>> The BCM2711 SoC features 5 SPI controllers which all share the same
>> interrupt line, the SPI driver needs to support interrupt sharing,
>> therefore use the chip specific compatible string to help with that.
> 
> You're saying above that the 5 controllers all share the interrupt
> but below you're only changing the compatible string of 4 controllers.
> 
> So I assume spi0 still has its own interrupt and only the additional
> 4 controllers present on the BCM2711/BCM7211 share their interrupt?

Correct, there are 5 instances, but only the 4 that were added for 2711
actually share the interrupt line, I will correct that in the next patch
version.
-- 
Florian