Re: [PATCH 2/3] ARM: dts: bcm2711: Update SPI nodes compatible strings

From: Florian Fainelli
Date: Thu Jun 04 2020 - 12:56:38 EST

On 6/4/2020 9:54 AM, Stefan Wahren wrote:
> Am 04.06.20 um 18:40 schrieb Florian Fainelli:
>> 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.
> No, all 5 instances uses the same interrupt line. Please see my comment
> before.

OK, but this is not going to be needed, I have another solution that
does not involve device tree changes.