Re: [PATCH 2/3] ARM: dts: bcm2711: Update SPI nodes compatible strings
From: Stefan Wahren <hidden>
Date: 2020-06-04 16:54:59
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linux-arm-kernel, linux-spi, lkml
Am 04.06.20 um 18:40 schrieb Florian Fainelli:
On 6/3/2020 9:20 PM, Lukas Wunner wrote:quoted
On Wed, Jun 03, 2020 at 08:46:54PM -0700, Florian Fainelli wrote:quoted
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. Regards